1984 Cadillac Seville Automatic Transmission Kits
Keep Your 1984 Cadillac Seville in Top Shape with Quality Automatic Transmission Kits
Whether you’re repairing or upgrading your Automatic Transmission Kit, using high-quality parts is key to keeping your 1984 Cadillac Seville looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Transmission Master Repair Kits and Transmission Shift Kits. 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.
Competitive Prices and Extensive Inventory
The average price for a 1984 Cadillac Seville Automatic Transmission Kit at Advance Auto Parts is around $387.66, with a range that starts at $162.99 and goes up to $499.99. With 2 options in stock from one trusted brand, finding the right fit is easy. Popular picks like Transkit For 65-87 TH400 Transmission and Transpak For 65-87 TH400 Transmission start at just $162.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Automatic Transmission Kit, 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 1984 Cadillac Seville in peak condition, inside and out.
Find Your Specific 1984 Cadillac Seville Automatic Transmission Kits
Looking for the perfect Automatic Transmission Kit for your 1984 Cadillac Seville? You’re in the right place. Below, you’ll find links to various types of Automatic Transmission Kits that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Automatic Transmission Kits, ensuring durability and a precise fit for your Cadillac Seville. Whether you’re driving a 1984 model or another popular model year like
1996,
1997,
1998,
1999,
2000,
2001,
2002,
2003, and
2004, we’ve got you covered. Purchasing Automatic Transmission Kits 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 Kits that fit your vehicle.
Essential 1984 Cadillac Seville Automatic Transmission Kits
B & M – Shift Improver Kit For 65-87 TH400 Transmission (Part No.20260)
from
$72.99
The B&M Shift Improver Kit the easiest way to get the performance you’ve always wanted out of your automatic transmission, two modes to select from: Heavy Duty, or Street/Strip. It’s our least expensive and simplest to install kit.
Product Features:
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Product Features:
- Provides Crisp Shifts
- On Any Stock Automatic Transmission
- Eliminates Soft/Sluggish Shift
- Eliminates Shift Overlap
- Eliminate Clutch and Band Wear
- Improves Transmission Life
- Transmission Removal Not Required
B & M – Transmission Kit, Master Overhaul Kit For TH400 (Part No.21041)
from
$449.99
These kits include all of the necessary components to rebuild your automatic transmission. OEM style gaskets included. Kits do not include overhaul instructions – please refer to factory shop manual for proper assembly procedures.
Product Features:
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Product Features:
- Complete High Perf. Or Racing Trans. Overhaul
- Includes Only OEM Valvebody Gaskets
- Instructions Not Included
B & M – Transpak For 65-87 TH400 Transmission (Part No.20228)
from
$162.99
The B&M Transpak has all the features in the Shift Improver Kit, plus it provides additional driver manual control. Retain full automatic features and standard shift points with selector in Drive.
Product Features:
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Product Features:
- Recalibrate Auto. Transmission
- Optimum Performance
- Select Your App. Mode
- Improves Transmission Life
- Trans. Removal Not Required
- Downshift At Any Speed
- Great For Trailer Towing
- For Heavy Loads Driving Downhill
ATP – AT SHIFT KIT (Part No.JK-1)
from
$75.99
AT SHIFT KIT
Pro-King – Automatic Transmission Deluxe Rebuild Kit (Part No.KS-15)
from
$222.99
One of the most complete rebuild kits in the automatic transmission industry today. Each Rebuild Kit contains only the highest quality parts that meet or exceed OE specifications.
Product Features:
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Product Features:
- Include steels, frictions, gaskets, and filter
- Includes Band and Modulator (if applicable)
ATP – AT MASTER REPAIR KIT (Part No.JM-26)
from
$1158.99
AT MASTER REPAIR KIT
ATP – AT MASTER REPAIR KIT (Part No.JM-9)
from
$253.99
AT MASTER REPAIR KIT
Pro-King – Automatic Transmission Basic Rebuild Kit (Part No.KB-828)
from
$93.99
This Basic Rebuild Kit contains a complete gasket Kit and friction set. Each Rebuild Kit contains only the highest quality parts that meet or exceed OE specifications.
Product Features:
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Product Features:
- Does not include steels or filter
ATP – AT MASTER REPAIR KIT (Part No.JM-27)
from
$1049.99
AT MASTER REPAIR KIT
B & M – Transkit For 65-87 TH400 Transmission (Part No.20229)
from
$499.99
A B&M transmission in a box! Transform your automatic transmission into a full-tilt B&M performer! This is our ultimate transmission kit – it comes complete with full instructions on how to assemble your transmission to B&M specifications.
Product Features:
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Product Features:
- High Perf. Friction Materials
- Complete Overhaul Gasket Set
- Modification Components
- Replacement Valves
- Replacement Springs
- Drain Plug Kit Included
ATP – AT MSTR REP KIT PLUS (Part No.CMS-20)
from
$256.99
AT MSTR REP KIT PLUS
ATP – AT MSTR REP KIT PLUS (Part No.JMS-9)
from
$368.99
AT MSTR REP KIT PLUS
Popular 1984 Cadillac Seville Automatic Transmission Kits Categories
Most Popular Transmission Master Repair Kit for 1984 Cadillac Sevilles
Enhance your 1984 Cadillac Seville with this popular Transmission Master Repair Kit we have in stock, for $499.99.
B & M – Transkit For 65-87 TH400 Transmission (Part No.20229)
from
$499.99
A B&M transmission in a box! Transform your automatic transmission into a full-tilt B&M performer! This is our ultimate transmission kit – it comes complete with full instructions on how to assemble your transmission to B&M specifications.
Product Features:
See More
Product Features:
- High Perf. Friction Materials
- Complete Overhaul Gasket Set
- Modification Components
- Replacement Valves
- Replacement Springs
- Drain Plug Kit Included
Best-Selling 1984 Cadillac Seville Transmission Shift Kit
Upgrade your Seville with our best-selling Transmission Shift Kit.
B & M – Transpak For 65-87 TH400 Transmission (Part No.20228)
from
$162.99
The B&M Transpak has all the features in the Shift Improver Kit, plus it provides additional driver manual control. Retain full automatic features and standard shift points with selector in Drive.
Product Features:
See More
Product Features:
- Recalibrate Auto. Transmission
- Optimum Performance
- Select Your App. Mode
- Improves Transmission Life
- Trans. Removal Not Required
- Downshift At Any Speed
- Great For Trailer Towing
- For Heavy Loads Driving Downhill
FAQs for 1984 Cadillac Seville Automatic Transmission Kits
What are the best-selling Automatic Transmission Kits for 1984 Cadillac Sevilles?
Out of 2 Automatic Transmission Kits that fit 1984 Cadillac Sevilles, the following parts are the top sellers:
- Transkit For 65-87 TH400 Transmission (22300029) – $499.99
- Transpak For 65-87 TH400 Transmission (17130002) – $162.99
What’s the price range for 1984 Cadillac Seville Automatic Transmission Kits?
The prices of Automatic Transmission Kits for the 1984 Cadillac Seville range from $162.99 up to $499.99 for the most premium parts.
What is the average price of an Automatic Transmission Kit for a 1984 Cadillac Seville?
The average price for Automatic Transmission Kits for the 1984 Cadillac Seville is $387.66. Keep in mind the variety of part types within our Automatic Transmission Kit 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 Kits for other Cadillac Seville model years?
What are the cheapest Automatic Transmission Kits for my 1984 Cadillac Seville?
The cheapest 1984 Cadillac Seville Automatic Transmission Kits we carry are:
- Transpak For 65-87 TH400 Transmission (17130002) – $162.99
- Transkit For 65-87 TH400 Transmission (22300029) – $499.99
Does Advance Auto Parts sell Automatic Transmission Kits for any other 1984 Cadillac models?
Yes. We stock Automatic Transmission Kits for 3 other popular 1984 Cadillac models. Some of the most popular are 1984 DeVille Automatic Transmission Kits, 1984 Fleetwood Automatic Transmission Kits, 1984 Commercial Chassis Automatic Transmission Kits, and 1984 Eldorado Automatic Transmission Kits.
What types of Automatic Transmission Kits do you sell for my 1984 Cadillac Seville?
As of 11/2/25, these are some of the most in-demand types of Automatic Transmission Kits for a 1984 Cadillac Seville:
Can I get help with 1984 Cadillac Seville Automatic Transmission Kit orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Cadillac Automatic Transmission Kits and more.
What is your return policy for Cadillac Seville Automatic Transmission Kits?
Advance Auto Parts keeps returns simple. For new Cadillac Seville Automatic Transmission Kits and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.