2004 Workhorse P42 Transmission Parts
Find Your Specific 2004 Workhorse P42 Transmission Parts
Below you will find various in-demand Workhorse Transmission Parts, components and accessories for your 2004 P42. Advance Auto Parts has popular P42 parts like Transmission Connectors, Transmission Bearings, Automatic Transmission Parts and more. You’ll also find aftermarket and OEM Transmission Parts for other P42 model years including
1999,
2000,
2001,
2002,
2003,
2005 and more. Select a category of 2004 Workhorse P42 Transmission Parts below and start saving instantly.
Popular 2004 Workhorse P42 Transmission Parts Categories
Essential Transmission Parts for 2004 Workhorse P42s
National – Tapered Roller Bearing Cone (Part No.LM501349)
from
$21.99
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
Product Features:
See More
Product Features:
- PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
- SMOOTH ROTATION – Crowned raceways and rollers for even load distribution
- OE-STYLE DESIGN – Engineered to meet OE specifications
- COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
- RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on
National – Multi-Purpose Bearing (Part No.A-35)
from
$35.99
Product Features:
See More
- CONSISTENT PERFORMANCE: Matched cup and cone components ensure consistent performance
- PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
- SMOOTH ROTATION: Crowned raceways and rollers for even load distribution
- OE-STYLE DESIGN: Engineered to meet OE specifications
- COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
- RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on
Dorman – Transmission Line Connector (Part No.800-755)
from
$12.99
Made of quality materials, this automatic transmission oil cooler line connector matches the fit and function of a damaged original equipment connector to restore leak-free performance between the transmission and the oil cooler.
Product Features:
See More
Product Features:
- Quality replacement – this transmission cooler connector matches the fit and function of the original equipment connector
- Durable construction – this oil cooler line connector is made of quality materials for a precise fit and leak-free durability
- Performance tested – this connector has been rigorously pressure tested to ensure reliable performance
- Ideal shop supply – this connector is recommended to have on hand any time service is being performed on the transmission oil cooler line
Dorman – Transmission Line Connector (Part No.800-759)
from
$14.49
Made of quality materials, this automatic transmission oil cooler line connector matches the fit and function of a damaged original equipment connector to restore leak-free performance between the transmission and the oil cooler.
Product Features:
See More
Product Features:
- Quality replacement – this transmission cooler connector matches the fit and function of the original equipment connector
- Durable construction – this oil cooler line connector is made of quality materials for a precise fit and leak-free durability
- Performance tested – this connector has been rigorously pressure tested to ensure reliable performance
- Ideal shop supply – this connector is recommended to have on hand any time service is being performed on the transmission oil cooler line
Dorman – Transmission Line Connector with 3/8 Tube X 1/4-18 In. Thread (Part No.800-604)
from
$8.99
Made of quality materials, this automatic transmission oil cooler line connector matches the fit and function of a damaged original equipment connector to restore leak-free performance between the transmission and the oil cooler.
Product Features:
See More
Product Features:
- Quality replacement – this transmission cooler connector matches the fit and function of the original equipment connector
- Durable construction – this oil cooler line connector is made of quality materials for a precise fit and leak-free durability
- Performance tested – this connector has been rigorously pressure tested to ensure reliable performance
- Ideal shop supply – this connector is recommended to have on hand any time service is being performed on the transmission oil cooler line
Dorman – Oil Cooler Line Connector with A 3/8-18 in. Thread (Part No.800-603)
from
$15.99
Made of quality materials, this automatic transmission oil cooler line connector matches the fit and function of a damaged original equipment connector to restore leak-free performance between the transmission and the oil cooler.
Product Features:
See More
Product Features:
- Quality replacement – this transmission cooler connector matches the fit and function of the original equipment connector
- Durable construction – this oil cooler line connector is made of quality materials for a precise fit and leak-free durability
- Performance tested – this connector has been rigorously pressure tested to ensure reliable performance
- Ideal shop supply – this connector is recommended to have on hand any time service is being performed on the transmission oil cooler line
Dorman – 4 Wire Multipurpose Connector (Part No.645-578)
from
$62.99
This neutral safety switch connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable performance and durability.
Product Features:
See More
Product Features:
- Direct replacement – this neutral safety switch connector matches the appearance and function of the factory hardware on specified applications
- Ideal solution – this connector is a reliable replacement for an original part that is missing or has failed due to fatigue
- Durable construction – this part is made from quality materials to ensure reliable performance and long service life
- Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
Spartan – Automatic Transmission Assembly; GM RWD 4L80E 4-Spd (Part No.1661A-81)
from
$2399.00
Our remanufactured transmissions have improved torque converters included with every transmission to eliminate the possibility of front seal leaks, vibration or premature bushing wear, All torque converters are tested for leaks, lock-up, concentricity & balance. Every fully remanufactured valve body, with complete system correction & recalibration kit, is tested independently & includes updated throttle valve, manual valve, 4-spool switch valve, pressure regulator valve & governor plugs for improved shifting, lubrication & performance. All wear-prone valves are restored to stringent specifications & vacuum tested to confirm proper function. Each remanufactured transmission is hot, cold, load & simulated road testing. All remanufactured transmissions are backed by the industry’s best, no-hassle nationwide warranty(limited).
Product Features:
See More
Product Features:
- Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
- Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
- Transmissions are securely packaged in a recyclable container that will also protect your core on the return trip. Our nationwide warehouse network means speedy delivery.
- All of our transmissions are Dyno tested to ensure the highest standard of trouble free service and longevity.
Spartan – Automatic Transmission Assembly; GM RWD 4L80E 4-Spd (Part No.1661B-81)
from
$2399.00
Our remanufactured transmissions have improved torque converters included with every transmission to eliminate the possibility of front seal leaks, vibration or premature bushing wear, All torque converters are tested for leaks, lock-up, concentricity & balance. Every fully remanufactured valve body, with complete system correction & recalibration kit, is tested independently & includes updated throttle valve, manual valve, 4-spool switch valve, pressure regulator valve & governor plugs for improved shifting, lubrication & performance. All wear-prone valves are restored to stringent specifications & vacuum tested to confirm proper function. Each remanufactured transmission is hot, cold, load & simulated road testing. All remanufactured transmissions are backed by the industry’s best, no-hassle nationwide warranty(limited).
Product Features:
See More
Product Features:
- Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
- Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
- Transmissions are securely packaged in a recyclable container that will also protect your core on the return trip. Our nationwide warehouse network means speedy delivery.
- All of our transmissions are Dyno tested to ensure the highest standard of trouble free service and longevity.
Premium Drive Train – Premium Remanufactured Automatic Transmission (Part No.T4L80E6502P)
from
$2534.99
All transmissions are completely disassembled and cleaned. All cases are media-blasted. Internal parts are inspected for wear or damage and replaced as required. All bushings are inspected and replaced as necessary. All friction components are replaced with upgraded heavy-duty parts. Drum assemblies are air-checked and side play is measured to ensure proper clearance. All seals, O-rings, and gaskets are replaced. All solenoids are tested and replaced if they do not pass duty-cycle specifications. Internal wiring harnesses are inspected and replaced as necessary. Valve bodies are disassembled, cleaned, and measured for wear. Valves and valve bores are inspected, and bores are machined as required. Completed valve bodies are tested for proper operation prior to dyno testing.
Product Features:
See More
Product Features:
- Each transmission undergoes rigorous dyno testing to verify precise hydraulic pressures, smooth shifting, torque converter function, and park lock operation-guaranteeing reliable, trouble-free driving.
- Every transmission is fully disassembled, cleaned, and rebuilt using 100% upgraded heavy-duty seals, friction components, solenoids, and torque converter parts to ensure maximum durability and performance.
- Drum assemblies are air checked and side play is checked to assure proper clearance. 100% of seals, oft.rings and gaskets are replaced.
- 100% of solenoids are checked and replaced if they do not pass duty cycle tests. Internal wiring harness are checked and replaced as necessary. Valve bodies are disassembled, cleaned, and measured for wear.
- Transmissions are assembled, end plays are set and fasteners are torqued to the required specification.
- Torque Converter: 100% of converters are dynamic balanced. 100% of pumps are furnaced brazed. 100% new bearings and oft.rings. 100% new springs and rollers in stator. 100% new thrust washers. 100% new friction liners in overdrive lockup converters.
- 100% of transmissions are dynamometer tested to ensure proper pressures and shift quality throughout the operating range. All upshifts and downshifts are checked against preset parameters. Torque converter stall speed and lockup is verified on the dyno
Premium Drive Train – Premium Remanufactured Automatic Transmission (Part No.T4L80E659912P)
from
$2534.99
All transmissions are completely disassembled and cleaned. All cases are media-blasted. Internal parts are inspected for wear or damage and replaced as required. All bushings are inspected and replaced as necessary. All friction components are replaced with upgraded heavy-duty parts. Drum assemblies are air-checked and side play is measured to ensure proper clearance. All seals, O-rings, and gaskets are replaced. All solenoids are tested and replaced if they do not pass duty-cycle specifications. Internal wiring harnesses are inspected and replaced as necessary. Valve bodies are disassembled, cleaned, and measured for wear. Valves and valve bores are inspected, and bores are machined as required. Completed valve bodies are tested for proper operation prior to dyno testing.
Product Features:
See More
Product Features:
- Each transmission undergoes rigorous dyno testing to verify precise hydraulic pressures, smooth shifting, torque converter function, and park lock operation-guaranteeing reliable, trouble-free driving.
- Every transmission is fully disassembled, cleaned, and rebuilt using 100% upgraded heavy-duty seals, friction components, solenoids, and torque converter parts to ensure maximum durability and performance.
- Drum assemblies are air checked and side play is checked to assure proper clearance. 100% of seals, oft.rings and gaskets are replaced.
- 100% of solenoids are checked and replaced if they do not pass duty cycle tests. Internal wiring harness are checked and replaced as necessary. Valve bodies are disassembled, cleaned, and measured for wear.
- Transmissions are assembled, end plays are set and fasteners are torqued to the required specification.
- Torque Converter: 100% of converters are dynamic balanced. 100% of pumps are furnaced brazed. 100% new bearings and oft.rings. 100% new springs and rollers in stator. 100% new thrust washers. 100% new friction liners in overdrive lockup converters.
- 100% of transmissions are dynamometer tested to ensure proper pressures and shift quality throughout the operating range. All upshifts and downshifts are checked against preset parameters. Torque converter stall speed and lockup is verified on the dyno
Upgrade your 2004 Workhorse P42 with Top-Quality Transmission Parts
When it comes to maintaining or upgrading your 2004 Workhorse P42, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Workhorse or enhancing its overall performance, Transmission Parts are key to keeping your P42 functioning at its best. At Advance Auto Parts, we offer a wide selection of 6 Transmission Parts for the 2004 Workhorse P42, designed to meet your needs without breaking the bank.
From
Transmission Connector
replacements to
Transmission Bearings
upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.
Affordable Prices and Wide Selection
Shopping for Transmission Parts for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Transmission Parts for your 2004 Workhorse P42 at great prices.
Our Transmission Parts inventory for this model
ranges from just $8.99 to $2,458.00, with
an average price of $273.09.
Our 6 Transmission Parts in stock come from 3 trusted brands, so you’re sure to find the right part for your 2004 Workhorse P42 without overspending.
Top Brands and High Customer Satisfaction
Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 2004 Workhorse P42, we stock popular OEM and aftermarket Transmission Parts from top names
like National Dorman, and more.
National Transmission Parts
start at just $35.99 and boast an impressive 4.3 stars average rating from customers.
With 69 customer reviews and counting, our 2004 Workhorse P42 Transmission Parts have a strong track record of reliability, ensuring you can trust your purchase.
Explore Related Parts and More
While you’re here, don’t forget to check out other essential categories that go hand in hand with Transmission Part upgrades. Explore related part types like Batteries and Chargers, Fluids and Chemicals
and more to make sure your 2004 Workhorse P42 is always ready to roll. We’re committed to providing you with everything you need to keep your P42 in top shape, all in one place.
Start shopping confidently below for your 2004 Workhorse P42!
Best-Selling Transmission Connectors for 2004 Workhorse P42s
Enhance the driving experience in your Workhorse with 2 quality Transmission Connector components, starting at $8.99.
Dorman – Transmission Line Connector (Part No.800-755)
from
$12.99
Made of quality materials, this automatic transmission oil cooler line connector matches the fit and function of a damaged original equipment connector to restore leak-free performance between the transmission and the oil cooler.
Product Features:
See More
Product Features:
- Quality replacement – this transmission cooler connector matches the fit and function of the original equipment connector
- Durable construction – this oil cooler line connector is made of quality materials for a precise fit and leak-free durability
- Performance tested – this connector has been rigorously pressure tested to ensure reliable performance
- Ideal shop supply – this connector is recommended to have on hand any time service is being performed on the transmission oil cooler line
Dorman – Transmission Line Connector with 3/8 Tube X 1/4-18 In. Thread (Part No.800-604)
from
$8.99
Made of quality materials, this automatic transmission oil cooler line connector matches the fit and function of a damaged original equipment connector to restore leak-free performance between the transmission and the oil cooler.
Product Features:
See More
Product Features:
- Quality replacement – this transmission cooler connector matches the fit and function of the original equipment connector
- Durable construction – this oil cooler line connector is made of quality materials for a precise fit and leak-free durability
- Performance tested – this connector has been rigorously pressure tested to ensure reliable performance
- Ideal shop supply – this connector is recommended to have on hand any time service is being performed on the transmission oil cooler line
Most Popular 2004 Workhorse P42 Transmission Bearings
Customize your Workhorse with 1 Transmission Bearings products
like Automatic Transmission Differential Bearings, all
priced under $21.99.
National – Tapered Roller Bearing Cone (Part No.LM501349)
from
$21.99
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
Product Features:
See More
Product Features:
- PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
- SMOOTH ROTATION – Crowned raceways and rollers for even load distribution
- OE-STYLE DESIGN – Engineered to meet OE specifications
- COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
- RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on
Top Picks for 2004 Workhorse P42 Automatic Transmission Parts
Upgrade Workhorse P42s with top-quality Automatic Transmission Parts parts, including 1 OEM and aftermarket selections for your 2004 model.
Spartan – Automatic Transmission Assembly; GM RWD 4L80E 4-Spd (Part No.1653A-81)
from
$2458.00
Our remanufactured transmissions have improved torque converters included with every transmission to eliminate the possibility of front seal leaks, vibration or premature bushing wear, All torque converters are tested for leaks, lock-up, concentricity & balance. Every fully remanufactured valve body, with complete system correction & recalibration kit, is tested independently & includes updated throttle valve, manual valve, 4-spool switch valve, pressure regulator valve & governor plugs for improved shifting, lubrication & performance. All wear-prone valves are restored to stringent specifications & vacuum tested to confirm proper function. Each remanufactured transmission is hot, cold, load & simulated road testing. All remanufactured transmissions are backed by the industry’s best, no-hassle nationwide warranty(limited).
Product Features:
See More
Product Features:
- Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
- Our Remanufactured Transmissions include torque convertors, trans is completely disassembled & checked then reassembled to spec for tolerances, vacuum, seal & balance, all wear parts replaced & sim tested.
- Transmissions are securely packaged in a recyclable container that will also protect your core on the return trip. Our nationwide warehouse network means speedy delivery.
- All of our transmissions are Dyno tested to ensure the highest standard of trouble free service and longevity.
In-Demand Automatic Transmission Differential for 2004 Workhorse P42s
Select from 1 premium Automatic Transmission Differential parts for your 2004 Workhorse P42.
National – Multi-Purpose Bearing (Part No.A-35)
from
$35.99
Product Features:
See More
- CONSISTENT PERFORMANCE: Matched cup and cone components ensure consistent performance
- PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
- SMOOTH ROTATION: Crowned raceways and rollers for even load distribution
- OE-STYLE DESIGN: Engineered to meet OE specifications
- COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
- RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on
Most Sold 2004 Workhorse P42 Back Up Neutral Safety Parts
Explore our best-selling Workhorse parts for the 2004 P42 among 1 OEM and aftermarket options starting from $62.99.
Dorman – 4 Wire Multipurpose Connector (Part No.645-578)
from
$62.99
This neutral safety switch connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable performance and durability.
Product Features:
See More
Product Features:
- Direct replacement – this neutral safety switch connector matches the appearance and function of the factory hardware on specified applications
- Ideal solution – this connector is a reliable replacement for an original part that is missing or has failed due to fatigue
- Durable construction – this part is made from quality materials to ensure reliable performance and long service life
- Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
Top-Rated Transmission Parts Brands For Your 2004 Workhorse P42
Shop for the best-rated brands offering Transmission Parts and other products for your 2004 Workhorse P42s. Below you’ll find some of our best rated Transmission Parts from National and Dorman, and more. Transmission Parts from these brands that fit a 2004 P42 start at just $8.99 and are rated as high as 4.3 stars. OEM and aftermarket Transmission Parts don’t get more top quality, durable, and affordable than from the brands below.
Popular National 2004 Workhorse P42 Transmission Parts
When it comes to maintaining or upgrading your 2004 Workhorse P42, using quality Transmission Parts is essential to ensure durability and a perfect fit. National ticks all of those boxes. We offer a wide selection of National Transmission Parts, specifically designed for the 2004 Workhorse P42. With over 1 National brand Transmission Parts in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $35.99. Plus, with over 23 customer reviews and an average rating of 4.3 stars, you can trust that our National Transmission Parts will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.
Popular Dorman 2004 Workhorse P42 Transmission Parts
Dorman auto parts is one of the highest quality Transmission Part brands in the market. Any 2004 Workhorse P42 owner should feel confident when installing genuine Dorman parts in their vehicle. To ensure the best fit and performance for your 2004 P42, Advance Auto Parts carries a full inventory of 2 Dorman Transmission Parts. Plus you will be keeping your Workhorse in peak condition while saving money because prices on these Dorman Transmission Parts range from $8.99 to $12.99, plus, with more than 10 customer reviews and an impressive 4.2 stars average rating, you can be confident the Fram Transmission Parts below will deliver on both quality and value.
from
$8.99
(9)
Transmission Line Connector with 3/8 Tube X 1/4-18 In. Thread
“Fit perfectly in my 4L60”
from
$12.99
(1)
Transmission Line Connector
“Fits 700r transmission perfect for hooking steel transmission lines”
FAQs for 2004 Workhorse P42 Transmission Parts
Which Transmission Parts are best-sellers for 2004 Workhorse P42s?
Out of 6 Transmission Parts that fit 2004 Workhorse P42s, the following parts are the top sellers:
- 4 Wire Multipurpose Connector (10717310) – $62.99
- Automatic Transmission Assembly; GM RWD 4L80E 4-Spd (50014628) – $2,458.00
What’s the price range for 2004 Workhorse P42 Transmission Parts?
Transmission Part prices for the 2004 Workhorse P42 start at $8.99 and go up to $2,458.00 for the most premium parts.
What’s the average price of a Transmission Part for a 2004 Workhorse P42?
The average price for Transmission Parts for the 2004 Workhorse P42 is $273.09. Keep in mind the variety of part types within our Transmission Part category so you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Transmission Parts for other Workhorse P42 model years?
What are the cheapest Transmission Parts for my 2004 Workhorse P42?
The cheapest 2004 Workhorse P42 Transmission Parts we carry in stock are:
- Transmission Line Connector with 3/8 Tube X 1/4-18 In. Thread (9110042) – $8.99
- Transmission Line Connector (20230066) – $12.99
- Tapered Roller Bearing Cone (3277410) – $21.99
- Multi-Purpose Bearing (3275876) – $35.99
- 4 Wire Multipurpose Connector (10717310) – $62.99
What are the top-rated Transmission Parts that fit the 2004 Workhorse P42?
Out of 69 reviews by customers, our 2004 Workhorse P42 Transmission Parts have an average customer rating of . These are some of the highest-rated Transmission Part types for the 2004 Workhorse P42 and their top-rated products:
- Automatic Transmission Differential
- Multi-Purpose Bearing (3275876) – $35.99
- Transmission Connectors
- Multi-Purpose Bearing (3275876) – $35.99
What types of Transmission Parts do you sell for my 2004 Workhorse P42?
As of 3/1/26, these are some of the most in-demand types of Transmission Parts for a 2004 Workhorse P42:
Can I get help with 2004 Workhorse P42 Transmission Part orders?
Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Workhorse Transmission Parts and more.
What is your return policy for Workhorse P42 Transmission Parts?
Advance Auto Parts keeps returns simple. For new Workhorse P42 Transmission Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.
