1978 GMC C35 Automatic Transmission Parts

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Keep Your 1978 GMC C35 in Top Shape with Quality Automatic Transmission Parts

Whether you’re repairing or upgrading your Automatic Transmission Part, using high-quality parts is key to keeping your 1978 GMC C35 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Transmission Solenoids, Detent Cables, and Transmission Bushings. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Automatic Transmission Parts from Trusted Brands

Looking for a reliable Automatic Transmission Part? We’ve got you covered with options from brands you know and trust like Dorman and Pro-King. For example, Dorman Automatic Transmission Parts start at just $7.49 with an average 4.2 star rating. Pro-King offer similar pricing and quality, backed by strong customer feedback. With over 211 reviews and a solid 4 star average, you can shop with confidence knowing other GMC C35 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1978 GMC C35 Automatic Transmission Part at Advance Auto Parts is around $43.17, with a range that starts at $4.29 and goes up to $118.99. With 21 options in stock from 6 trusted brands, finding the right fit is easy. Popular picks like Chrome Automatic Transmission Dipstick & Tube – 27" Length, ATP Automatic Transmission Detent Cable, and AT SOLENOID SEAL start at just $4.29 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Automatic Transmission Part, don’t forget to check out other key components like Torque Converter and Related Products and Transmission Cooler and Parts. At Advance Auto Parts, we’re here to help you keep your 1978 GMC C35 in peak condition, inside and out.

Looking for the perfect Automatic Transmission Part for your 1978 GMC C35? You’re in the right place. Below, you’ll find links to various types of Automatic Transmission Parts that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Automatic Transmission Parts, ensuring durability and a precise fit for your GMC C35. Whether you’re driving a 1978 model or another popular model year like 1975, 1976, and 1977, we’ve got you covered. Purchasing Automatic Transmission Parts from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Automatic Transmission Parts that fit your vehicle.

Essential 1978 GMC C35 Automatic Transmission Parts

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$11.99

This clutch pilot bushing is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

Direct replacement – this clutch pilot bushing matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this bushing is a reliable replacement for an original part that 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

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$11.79

AT FRT PUMP BUSHING

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$99.99

When swapping the TH400 transmission into any vehicle, this kit makes installation of the transmission’s kickdown feature a snap. This switch mounts to either a TH700R4, TH200, TH200-R4 or TH350 throttle cable bracket.

Product Features:

Allows High Speed Cruise
Cruise In Overdrive
Prevents Part Throttle Kickdown
Quick Installation

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$118.99

AT CONTR SOLENOID

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$7.49

This transfer case vent is designed to match the fit and function of the original vent on specified vehicles, and is engineered for durability and reliable performance.

Product Features:

Direct replacement – this transfer case vent is designed to match the fit and function of the original vent on specified vehicles
Restores functionality – reliable replacement for an original vent that has failed due to blockage or 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

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$95.99

Billet aluminum handle with flexible braded steel tube mounts to the firewall. 29-3/4 inch long.

Product Features:

Braided Stainless Steel
Firewall Mounting
Includes Oil Fill Tube

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$34.49

Includes dipstick with chromed steel handle and chromed steel dipstick tube with mounting tab. 27 inch long.

Product Features:

Fits GM Th350 – Chevy Specific. Modify For Others
27 In Length
Chrome Plated Steel

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$33.99

Cable Bracket, GM (Bandit style shifters only) APPLICATION: For TH-400, 350, 250, 200, 700R4, 200-4R with 80797, 80798 or 81050 shifter.

Product Features:

Shifter Service Parts
Steel
Natural Finish
Sold individually
Replacement for Bandit shifters

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$49.99

ATP Universal Fit Detent Cables are designed to cover many applications and are no compromise replacement parts

Product Features:

Includes brackets, grommets, etc to match original
Fits many GM transmissions
Adjustable

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$32.99

Detent cables connect the throttle mechanism to the transmission. Old cables can bind, break, or just become sluggish. The best repair is to replace the old cable with a new one. ATP Detent cables are designed to fit and function just like the original part to ensure durability and long life.

Product Features:

Includes brackets, grommets, etc to match original
Helps transmission determine ideal downshift
Improves vehicle performance

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$23.99

Detent cables connect the throttle mechanism to the transmission. Old cables can bind, break, or just become sluggish. The best repair is to replace the old cable with a new one. ATP Detent cables are designed to fit And function just like the original part to ensure durability And long life.

Product Features:

Includes brackets, grommets, etc to match original
Helps transmission determine ideal downshift
Improves vehicle performance

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$51.99

AT MODULATOR VALVE

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$21.99

Fully adjustable vacuum modulator to maintain accurate shift points.

Product Features:

Meets or exceeds OE fit, form and function

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$49.99

B&M’s vacuum modulator is fully adjustable, this allows you to tailor your shift points to within a range of 2-4 mph. Comes preadjusted for normal shift points. For TH350 and TH400.

Product Features:

Fully Adjustable
Allows You To Tailor Shift Points
Comes Supplied Pre-Adjusted

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$29.99

AUTO TRANS BAND

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$9.59

AT OIL PUMP ORING

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$4.29

AT SOLENOID SEAL

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$13.79

AT CLUTCH PLATE

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$9.59

AT CLUTCH PLATE

Popular 1978 GMC C35 Automatic Transmission Parts Categories

Transmission Solenoids

Transmission Dipsticks

Transmission Bushings

Detent Cables

Transmission Modulator Valves

Automatic Transmission Case Vents

Transmission Bands

Automatic Transmission Fluid Filler Tube Seals

Automatic Transmission Oil Pump O-Rings

Automatic Transmission Shifter Cable Brackets

Automatic Transmission Friction Discs

Best-Selling 1978 GMC C35 Detent Cables

Upgrade your C35 with one of our 2 best-selling Detent Cables, earning an average 1 stars rating across 1 reviews.

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$23.99

Detent cables connect the throttle mechanism to the transmission. Old cables can bind, break, or just become sluggish. The best repair is to replace the old cable with a new one. ATP Detent cables are designed to fit And function just like the original part to ensure durability And long life.

Product Features:

Includes brackets, grommets, etc to match original
Helps transmission determine ideal downshift
Improves vehicle performance

from

$49.99

ATP Universal Fit Detent Cables are designed to cover many applications and are no compromise replacement parts

Product Features:

Includes brackets, grommets, etc to match original
Fits many GM transmissions
Adjustable

Top-Quality Transmission Bushings for 1978 GMC C35s

Choose a high-quality OEM or aftermarket Transmission Bushing for GMC C35s and enjoy top-notch performance from $11.79.

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$11.99

Direct replacement – this clutch pilot bushing matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this bushing is a reliable replacement for an original part that 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

from

$11.79

AT FRT PUMP BUSHING

Top Picks for 1978 GMC C35 Transmission Modulator Valves

Invest in one of our 6 durable Transmission Modulator Valves for your 1978 GMC, knowing you’re getting trusted brands and expert craftsmanship.

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$21.99

Fully adjustable vacuum modulator to maintain accurate shift points.

Product Features:

Meets or exceeds OE fit, form and function

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$33.99

Fully adjustable vacuum modulator to maintain accurate shift points.

Product Features:

Meets or exceeds OE specifications

from

$49.99

Fully Adjustable
Allows You To Tailor Shift Points
Comes Supplied Pre-Adjusted

from

$51.99

AT MODULATOR VALVE

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$21.99

AT MODULATOR VALVE

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$48.99

The transmission modulator valve is a vacuum operated mechanical device located on the transmission case. This valve will have a actuator rod extended into the transmission valve body inside the transmission which will control the flow of transmission fluid within the transmission to place the transmission in the most optimal forward gear selection.

Product Features:

Application matched component ensures the transmission gear position system can be returned to like new condition.
Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
This part will look and function just like the original unit being replaced.

Top-Rated Transmission Dipsticks for 1978 GMC C35s

Make a smart move for your 1978 GMC C35 with products all priced from $34.49 to $95.99.

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from

$34.49

Includes dipstick with chromed steel handle and chromed steel dipstick tube with mounting tab. 27 inch long.

Product Features:

Fits GM Th350 – Chevy Specific. Modify For Others
27 In Length
Chrome Plated Steel

from

$95.99

Billet aluminum handle with flexible braded steel tube mounts to the firewall. 29-3/4 inch long.

Product Features:

Braided Stainless Steel
Firewall Mounting
Includes Oil Fill Tube

Top-Rated Automatic Transmission Part Brands For Your 1978 GMC C35

When it comes to finding the perfect Automatic Transmission Part for your 1978 GMC C35, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 6 trusted brands. We carry the most popular Automatic Transmission Part brands including Dorman and Pro-King, and more, all known for their exceptional customer ratings (average brand rating of 4.2 stars) and competitive prices, as low as $7.49. Purchasing a Automatic Transmission Part from us here at Advance Auto Parts is a smart move for both you and your 1978 GMC C35, providing peace of mind with parts that meet or exceed OEM standards.

Popular Dorman 1978 GMC C35 Automatic Transmission Parts

If you’re looking for a top-quality Automatic Transmission Part for your 1978 GMC C35, Advance Auto Parts has exactly what you need with our selection of Dorman Automatic Transmission Parts. We have 2 Dorman Automatic Transmission Parts in stock for this fitment, all known for their durability and precision fit. With prices starting at just $7.49 and an average cost of $9.74, you’ll find the perfect Automatic Transmission Part for your needs and budget. Dorman Automatic Transmission Parts for the 1978 GMC C35 come highly rated, with over 5 customer reviews and an impressive average rating of 4.2 stars. Choosing a Dorman Automatic Transmission Part from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.

from $7.49

(4)

Auto Transmission Case Vent

“Works for multiple vent areas of any vehicle, I got it for my gas tank fume vents!”

from $11.99

(1)

Clutch Pilot Bushing

“Fit my 350 sbc and M22 muncie, was magnetic, indicating iron / steel but I didn’t have another bushing to compare it to, maybe they all have some iron”

Top-Quality Pro-King 1978 GMC C35 Automatic Transmission Parts

For those in search of a high-quality Automatic Transmission Part for their 1978 GMC C35, Advance Auto Parts offers a great selection of Pro-King Automatic Transmission Parts. With 2 Pro-King Automatic Transmission Parts in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Automatic Transmission Parts start at just $21.99, with an average price of $27.99, giving you a range of options to suit your budget. Backed by over 22 customer ratings and an average rating of 4.0 stars, Pro-King Automatic Transmission Parts provide both reliability and excellent performance. Choosing a Pro-King Automatic Transmission Part from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.

from $33.99

(11)

Automatic Transmission Vacuum Modulator

“I have a 1988 Buick Reatta that recently begun to fail to shift. After trying things such as changing the filter and fluid, we eventually were recomme”

from $21.99

(11)

Automatic Transmission Vacuum Modulator

“Great product”

FAQs for 1978 GMC C35 Automatic Transmission Parts

What are the best-selling Automatic Transmission Parts for 1978 GMC C35s?

Out of 21 Automatic Transmission Parts that fit 1978 GMC C35s, the following parts are the top sellers:

Chrome Automatic Transmission Dipstick & Tube – 27" Length (3443361) – $34.49
ATP Automatic Transmission Detent Cable (5610613) – $23.99
AT SOLENOID SEAL (11239035) – $4.29

What’s the price range for 1978 GMC C35 Automatic Transmission Parts?

The prices of Automatic Transmission Parts for the 1978 GMC C35 range from $4.29 up to $118.99 for the most premium parts.

What is the average price of an Automatic Transmission Part for a 1978 GMC C35?

The average price for Automatic Transmission Parts for the 1978 GMC C35 is $43.17. Keep in mind the variety of part types within our Automatic Transmission Part category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Automatic Transmission Parts for other GMC C35 model years?

Yes, we carry Automatic Transmission Parts for 2 model years of GMC C35s between 1975 and 1977. The following model years are the most popular for Automatic Transmission Part purchases: 1977, 1976, and 1975.

What are the cheapest Automatic Transmission Parts for my 1978 GMC C35?

The cheapest 1978 GMC C35 Automatic Transmission Parts we carry are:

AT SOLENOID SEAL (11239035) – $4.29
Auto Transmission Case Vent (22148677) – $7.49
AT OIL PUMP ORING (11236298) – $9.59
AT CLUTCH PLATE (11239333) – $9.59
AT FRT PUMP BUSHING (11237261) – $11.79

Does Advance Auto Parts sell Automatic Transmission Parts for any other 1978 GMC models?

Yes. We stock Automatic Transmission Parts for 12 other popular 1978 GMC models. Some of the most popular are 1978 Jimmy Automatic Transmission Parts, 1978 Caballero Automatic Transmission Parts, 1978 K25 Automatic Transmission Parts, 1978 K15 Automatic Transmission Parts, and 1978 G25 Automatic Transmission Parts.

What are the top-rated Automatic Transmission Parts that fit the 1978 GMC C35?

Based on 211 reviews by customers, our 1978 GMC C35 Automatic Transmission Parts have an average customer rating of 4 stars. These are the highest-rated categories of Automatic Transmission Parts for the 1978 GMC C35 and their top-rated products:

Transmission Dipsticks
- Chrome Automatic Transmission Dipstick & Tube – 27" Length (3443361) – $34.49
Automatic Transmission Fluid Filler Tube Seals
- AT SOLENOID SEAL (11239035) – $4.29
Automatic Transmission Case Vents
- Auto Transmission Case Vent (22148677) – $7.49

What types of Automatic Transmission Parts do you sell for my 1978 GMC C35?

As of 3/1/26, these are some of the most in-demand types of Automatic Transmission Parts for a 1978 GMC C35:

Can I get help with 1978 GMC C35 Automatic Transmission Part orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Automatic Transmission Parts and more.

What is your return policy for GMC C35 Automatic Transmission Parts?

Advance Auto Parts keeps returns simple. For new GMC C35 Automatic Transmission Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

1978 GMC C35 Automatic Transmission Parts

Dorman – Help – Clutch Pilot Bushing (Part No.14650)

ATP – AT FRT PUMP BUSHING (Part No.CB-4)

B & M – Kickdown Switch Kit For TH400 Transmission (Part No.20297)

ATP – AT CONTR SOLENOID (Part No.SE-1)

Dorman – Help – Auto Transmission Case Vent (Part No.14689)

Mr. Gasket – A/Tdipstick (Part No.9703G)

Mr. Gasket – Chrome Automatic Transmission Dipstick & Tube – 27" Length (Part No.9764)

B & M – Cable Bracket (Part No.30498)

ATP – Automatic Transmission Universal Detent Cable 28 to 48 inches (Part No.Y-754)

ATP – Automatic Transmission Detent Cable (Part No.Y-103)

ATP – ATP Automatic Transmission Detent Cable (Part No.Y-100)

ATP – AT MODULATOR VALVE (Part No.JX-76)

Pro-King – Automatic Transmission Vacuum Modulator (Part No.MD-48)

B & M – Modulator (Part No.20234)

ATP – AUTO TRANS BAND (Part No.JX-58)

ATP – AT OIL PUMP ORING (Part No.SO-21)

ATP – AT SOLENOID SEAL (Part No.JO-15)

ATP – AT CLUTCH PLATE (Part No.JC-57)

ATP – AT CLUTCH PLATE (Part No.JC-50)

ATP – AT CONTR SOLENOID (Part No.SE-1)

B & M – Kickdown Switch Kit For TH400 Transmission (Part No.20297)

ATP – ATP Automatic Transmission Detent Cable (Part No.Y-100)

ATP – Automatic Transmission Universal Detent Cable 28 to 48 inches (Part No.Y-754)

Dorman – Help – Clutch Pilot Bushing (Part No.14650)

ATP – AT FRT PUMP BUSHING (Part No.CB-4)

Pro-King – Automatic Transmission Vacuum Modulator (Part No.MD-48)

Pro-King – Automatic Transmission Vacuum Modulator (Part No.MD-28)

B & M – Modulator (Part No.20234)

ATP – AT MODULATOR VALVE (Part No.JX-76)

ATP – AT MODULATOR VALVE (Part No.JX-66)

Carquest Premium – Automatic Transmission Modulator Valve (Part No.VMC1023)

Mr. Gasket – Chrome Automatic Transmission Dipstick & Tube – 27" Length (Part No.9764)

Mr. Gasket – A/Tdipstick (Part No.9703G)