1978 GMC Caballero Automatic Transmission Kits

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Keep Your 1978 GMC Caballero 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 1978 GMC Caballero looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Automatic Transmission Oil Pump Seal Kit, Transmission Shift Kits, and Transmission Master Repair 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 1978 GMC Caballero Automatic Transmission Kit at Advance Auto Parts is around $176.24, with a range that starts at $15.99 and goes up to $459.99. With 12 options in stock from 4 trusted brands, finding the right fit is easy. Popular picks like ManTransBrg-SealKit, Transpak For 68-81 TH 350 Transmission, and AT OVERHAUL KIT start at just $102.99 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 1978 GMC Caballero in peak condition, inside and out.

Essential 1978 GMC Caballero Automatic Transmission Kits

B & M – Transpak (Part No.30235)

Transpak

from

$178.99
Shift Improver Kits – Buick, Chevrolet, GMC, Olds, Pontiac – 1968 to 1981 TH-350 and M38 Application: 1968 to 1981 TH-350 and M38 (for TH-350C use Transpak # 30235) Recalibrate your automatic transmission for optimum performance and extended life! Provides crisp shifts on any stock automatic transmissions. Elimination of soft sluggish shifts, shift overlap, and excess wear on clutches and bands due to slippage. Improves transmission life. Transmission removal not required. The B&M Shift Improver Kit the easiest way to get the stout performance you’ve always wanted out of your automatic transmission – and you get two modes of performance to select from: Heavy Duty, or Street/Strip. It’s our least expensive and simplest to install kit. All you need are a few dollars and some hand tools! In the space of an afternoon, you can turn your transmission into a B&M-tuned unit! Just ask the thousands of satisfied customers that have installed one in their transmissions! Stage 1 – Heavy Duty Firm positive shifts without loss of driver comfort for improved performance in all street vehicles. Recommended for regular passenger vehicles. Stage 2 – Street/Strip Provides very positive shifts for high performance street use or for competitive events. This model is for the enthusiast who wants the hardest, quickest possible shift.

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
See More

B & M – Transmission Kit, Transkit 68-81 TH-350 Transmission (Part No.30229)

Transmission Kit, Transkit 68-81 TH-350 Transmission

from

$459.99
B&M Transkits give you the same high-quality components that are used in all B&M Street and Strip transmissions. They also include special directions on how to modify your case, pump, and components.

Product Features:
  • High Perf. Friction Materials
  • Complete Overhaul Gasket Set
  • Modification Components
  • Replacement Valves
  • Replacement Springs
See More

B & M – Governor Recalibration Kit For TH-700R4, TH-400 and TH-350 Transmission (Part No.20248)

Governor Recalibration Kit For TH-700R4, TH-400 and TH-350 Transmission

from

$128.99
This kit allows you to adjust the shift points of your transmission after it is installed in your vehicle. The Governor Recalibration Kit is very useful if you have a vehicle that is very light; has a low rear-end gear ratio.

Product Features:
  • Adjust Shift Points Of Transmission
  • Useful For Light Vehicles
  • For Low Rear End Gear Ratio
  • Or Useful If It Is Conversion
See More

B & M – Shift Improver Kit, 82-93 TH700R4 (Part No.70239)

Shift Improver Kit, 82-93 TH700R4

from

$86.99
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:
  • 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
See More

B & M – Shift Improver Kit For 68-81 TH-350 Transmission (Part No.30262)

Shift Improver Kit For 68-81 TH-350 Transmission

from

$70.99
HEAVY DUTY-Firm positive shifts without loss of driver comfort for improved performance in all street vehicles. STREET/STRIP-Positive shifts for high performance street use or for competitive events. Hardest, quickest possible shift.

Product Features:
  • Provides Crisp Shifts
  • On Any Stock Automatic Transmission
  • Eliminates Soft/Sluggish Shift
  • Eliminates Shift Overlap
  • Eliminate Clutch and Band Wear
See More

B & M – Transpak For 68-81 TH 350 Transmission (Part No.30228)

Transpak For 68-81 TH 350 Transmission

from

$166.99
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:
  • Recalibrate Auto. Transmission
  • Optimum Performance
  • Select Your App. Mode
  • Improves Transmission Life
  • Trans. Removal Not Required
See More

B & M – Transpak For 82-93 TH700R4 Transmission (Part No.70235)

Transpak For 82-93 TH700R4 Transmission

from

$204.99
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:
  • 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
See More

ATP – AT OVERHAUL KIT (Part No.SGS-28)

AT OVERHAUL KIT

from

$102.99
AT OVERHAUL KIT

ATP – AT OVERHAUL KIT (Part No.SGS-27)

AT OVERHAUL KIT

from

$89.99
AT OVERHAUL KIT

ATP – AT BANNER KIT (Part No.CM-26)

AT BANNER KIT

from

$221.99
AT BANNER KIT

ATP – AT BANNER KIT (Part No.SM-11)

AT BANNER KIT

from

$206.99
AT BANNER KIT

ATP – AT MASTER REPAIR KIT (Part No.SM-9)

AT MASTER REPAIR KIT

from

$276.99
AT MASTER REPAIR KIT

Pro-King – Automatic Transmission Deluxe Rebuild Kit (Part No.KS-17)

Automatic Transmission Deluxe Rebuild Kit

from

$258.99
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:
  • Meets or exceeds OE specifications
  • Includes Band and Modulator (if applicable)
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ATP – AUTOMATIC TRANS PART (Part No.CMS-23)

AUTOMATIC TRANS PART

from

$376.99
AUTOMATIC TRANS PART

ATP – AT MSTR REP KIT PLUS (Part No.CMS-21)

AT MSTR REP KIT PLUS

from

$366.99
AT MSTR REP KIT PLUS

Pro-King – Automatic Transmission Basic Rebuild Kit (Part No.KB-838)

Automatic Transmission Basic Rebuild Kit

from

$135.99
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:
  • Meets or exceeds OE specifications
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ATP – AT MASTER REPAIR KIT (Part No.CM-22)

AT MASTER REPAIR KIT

from

$233.99
AT MASTER REPAIR KIT

B & M – Master Overhaul Kit, TH350 Transmission (Part No.21042)

Master Overhaul Kit, TH350 Transmission

from

$385.99
The Master Racing overhaul kits are supplied with all of the gaskets, seals, bushings, and friction material required for a complete high performance or racing trans overhaul. Does not come with transbrake gaskets or components.

Product Features:
  • Complete High Perf. Or Racing Trans. Overhaul
  • Includes Only OEM Valvebody Gaskets
  • Instructions Not Included
See More

ATP – AT MSTR REP KIT PLUS (Part No.CMS-20)

AT MSTR REP KIT PLUS

from

$273.99
AT MSTR REP KIT PLUS

Schaeffler – Shaft Seal (Part No.SS2803)

Shaft Seal

from

$15.99
Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
See More

Most Popular Automatic Transmission Oil Pump Seal Kit for 1978 GMC Caballeros

Enhance your 1978 GMC Caballero with this popular Automatic Transmission Oil Pump Seal Kit we have in stock, for $15.99.

Schaeffler – Shaft Seal (Part No.SS2803)

Shaft Seal

from

$15.99
Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
See More

Best-Selling 1978 GMC Caballero Transmission Shift Kits

Upgrade your Caballero with one of our 4 best-selling Transmission Shift Kits.

B & M – Transmission Kit, Transkit 68-81 TH-350 Transmission (Part No.30229)

Transmission Kit, Transkit 68-81 TH-350 Transmission

from

$459.99
B&M Transkits give you the same high-quality components that are used in all B&M Street and Strip transmissions. They also include special directions on how to modify your case, pump, and components.

Product Features:
  • High Perf. Friction Materials
  • Complete Overhaul Gasket Set
  • Modification Components
  • Replacement Valves
  • Replacement Springs
See More

B & M – Transpak For 68-81 TH 350 Transmission (Part No.30228)

Transpak For 68-81 TH 350 Transmission

from

$166.99
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:
  • Recalibrate Auto. Transmission
  • Optimum Performance
  • Select Your App. Mode
  • Improves Transmission Life
  • Trans. Removal Not Required
See More

B & M – Governor Recalibration Kit For TH-700R4, TH-400 and TH-350 Transmission (Part No.20248)

Governor Recalibration Kit For TH-700R4, TH-400 and TH-350 Transmission

from

$128.99
This kit allows you to adjust the shift points of your transmission after it is installed in your vehicle. The Governor Recalibration Kit is very useful if you have a vehicle that is very light; has a low rear-end gear ratio.

Product Features:
  • Adjust Shift Points Of Transmission
  • Useful For Light Vehicles
  • For Low Rear End Gear Ratio
  • Or Useful If It Is Conversion
See More

B & M – Shift Improver Kit For 68-81 TH-350 Transmission (Part No.30262)

Shift Improver Kit For 68-81 TH-350 Transmission

from

$70.99
HEAVY DUTY-Firm positive shifts without loss of driver comfort for improved performance in all street vehicles. STREET/STRIP-Positive shifts for high performance street use or for competitive events. Hardest, quickest possible shift.

Product Features:
  • Provides Crisp Shifts
  • On Any Stock Automatic Transmission
  • Eliminates Soft/Sluggish Shift
  • Eliminates Shift Overlap
  • Eliminate Clutch and Band Wear
See More

Top-Quality Transmission Master Repair Kits for 1978 GMC Caballeros

Choose a high-quality OEM or aftermarket Transmission Master Repair Kit for GMC Caballeros and enjoy top-notch performance from $276.99.

B & M – Master Overhaul Kit, TH350 Transmission (Part No.21042)

Master Overhaul Kit, TH350 Transmission

from

$385.99
The Master Racing overhaul kits are supplied with all of the gaskets, seals, bushings, and friction material required for a complete high performance or racing trans overhaul. Does not come with transbrake gaskets or components.

Product Features:
  • Complete High Perf. Or Racing Trans. Overhaul
  • Includes Only OEM Valvebody Gaskets
  • Instructions Not Included
See More

ATP – AT MASTER REPAIR KIT (Part No.SM-9)

AT MASTER REPAIR KIT

from

$276.99
AT MASTER REPAIR KIT

Top Picks for 1978 GMC Caballero Transmission Rebuild Kits

Invest in one of our 5 durable Transmission Rebuild Kits for your 1978 GMC, knowing you’re getting trusted brands and expert craftsmanship.

USA Standard Gear – ManTransBrg-SealKit (Part No.70267)

ManTransBrg-SealKit

from

$159.99
ManTransBrg-SealKit

ATP – AT BANNER KIT (Part No.SM-11)

AT BANNER KIT

from

$206.99
AT BANNER KIT

ATP – AT OVERHAUL KIT (Part No.SGS-28)

AT OVERHAUL KIT

from

$102.99
AT OVERHAUL KIT

ATP – AT OVERHAUL KIT (Part No.SGS-27)

AT OVERHAUL KIT

from

$89.99
AT OVERHAUL KIT

USA Standard Gear – ManTransSmallPartKit (Part No.79024)

ManTransSmallPartKit

from

$48.99
ManTransSmallPartKit

FAQs for 1978 GMC Caballero Automatic Transmission Kits

What are the best-selling Automatic Transmission Kits for 1978 GMC Caballeros?

Out of 12 Automatic Transmission Kits that fit 1978 GMC Caballeros, the following parts are the top sellers:

What’s the price range for 1978 GMC Caballero Automatic Transmission Kits?

The prices of Automatic Transmission Kits for the 1978 GMC Caballero range from $15.99 up to $459.99 for the most premium parts.

What is the average price of an Automatic Transmission Kit for a 1978 GMC Caballero?

The average price for Automatic Transmission Kits for the 1978 GMC Caballero is $176.24. 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 GMC Caballero model years?

Yes, we carry Automatic Transmission Kits for 8 model years of GMC Caballeros between 1979 and 1987. The following model years are the most popular for Automatic Transmission Kit purchases: 1987, 1986, 1985, 1984, 1983, 1982, 1981, 1980, and 1979.

What are the cheapest Automatic Transmission Kits for my 1978 GMC Caballero?

The cheapest 1978 GMC Caballero Automatic Transmission Kits we carry are:

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

Yes. We stock Automatic Transmission Kits for 12 other popular 1978 GMC models. Some of the most popular are 1978 Jimmy Automatic Transmission Kits, 1978 K25 Automatic Transmission Kits, 1978 K15 Automatic Transmission Kits, 1978 G25 Automatic Transmission Kits, and 1978 C25 Automatic Transmission Kits.

What types of Automatic Transmission Kits do you sell for my 1978 GMC Caballero?

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

Can I get help with 1978 GMC Caballero 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 GMC Automatic Transmission Kits and more.

What is your return policy for GMC Caballero Automatic Transmission Kits?

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