1978 Cadillac Eldorado Automatic Transmission Parts

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Keep Your 1978 Cadillac Eldorado 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 Cadillac Eldorado looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Transmission Modulator Valves, Transmission Bushings, and Automatic Transmission Fluid Filler Tube Seals. 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 Pro-King. For example, Pro-King Automatic Transmission Parts start at just $21.99 with an average 4.0 star rating. With over 48 reviews and a solid 5 star average, you can shop with confidence knowing other Cadillac Eldorado owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1978 Cadillac Eldorado Automatic Transmission Part at Advance Auto Parts is around $27.11, with a range that starts at $4.29 and goes up to $68.99. With 11 options in stock from 4 trusted brands, finding the right fit is easy. Popular picks like AT OIL PUMP ORING, AT MODULATOR VALVE, and AT MODULATOR VALVE start at just $9.59 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 Cadillac Eldorado in peak condition, inside and out.

Essential 1978 Cadillac Eldorado Automatic Transmission Parts

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

Automatic Transmission Vacuum Modulator

from

$21.99
Fully adjustable vacuum modulator to maintain accurate shift points.

Product Features:
  • Meets or exceeds OE fit, form and function
See More

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

AT MODULATOR VALVE

from

$21.99
AT MODULATOR VALVE

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

Automatic Transmission Vacuum Modulator

from

$33.99
Fully adjustable vacuum modulator to maintain accurate shift points.

Product Features:
  • Meets or exceeds OE specifications
See More

ATP – AT MODULATOR VALVE (Part No.JX-70)

AT MODULATOR VALVE

from

$49.99
AT MODULATOR VALVE

ATP – AT FRT PUMP BUSHING (Part No.CB-30)

AT FRT PUMP BUSHING

from

$12.79
AT FRT PUMP BUSHING

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

AT FRT PUMP BUSHING

from

$11.79
AT FRT PUMP BUSHING

ATP – AUTO TRANS BAND (Part No.CX-32)

AUTO TRANS BAND

from

$29.99
AUTO TRANS BAND

ATP – AUTO TRANS BAND (Part No.JX-58)

AUTO TRANS BAND

from

$29.99
AUTO TRANS BAND

ATP – AT CLUTCH PLATE (Part No.JC-50)

AT CLUTCH PLATE

from

$9.59
AT CLUTCH PLATE

ATP – AT CLUTCH PLATE (Part No.CC-22)

AT CLUTCH PLATE

from

$26.49
AT CLUTCH PLATE

B & M – Cable Bracket (Part No.30498)

Cable Bracket

from

$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
See More

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

AT SOLENOID SEAL

from

$4.29
AT SOLENOID SEAL

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

AT OIL PUMP ORING

from

$9.59
AT OIL PUMP ORING

Most Popular Transmission Modulator Valves for 1978 Cadillac Eldorados

Enhance your 1978 Cadillac Eldorado with one of the 5 Transmission Modulator Valves we have in stock, starting at just $21.99.

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

Automatic Transmission Vacuum Modulator

from

$21.99
Fully adjustable vacuum modulator to maintain accurate shift points.

Product Features:
  • Meets or exceeds OE fit, form and function
See More

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

Automatic Transmission Vacuum Modulator

from

$33.99
Fully adjustable vacuum modulator to maintain accurate shift points.

Product Features:
  • Meets or exceeds OE specifications
See More

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

AT MODULATOR VALVE

from

$51.99
AT MODULATOR VALVE

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

AT MODULATOR VALVE

from

$21.99
AT MODULATOR VALVE

Carquest Premium – Automatic Transmission Modulator Valve (Part No.VMC1001)

Automatic Transmission Modulator Valve

from

$68.99
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.
See More

Best-Selling 1978 Cadillac Eldorado Transmission Bushing

Upgrade your Eldorado with our best-selling Transmission Bushing.

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

AT FRT PUMP BUSHING

from

$11.79
AT FRT PUMP BUSHING

Top-Quality Automatic Transmission Fluid Filler Tube Seals for 1978 Cadillac Eldorados

Choose a high-quality OEM or aftermarket Automatic Transmission Fluid Filler Tube Seal for Cadillac Eldorados and enjoy top-notch performance from $4.29.

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

AT SOLENOID SEAL

from

$4.29
AT SOLENOID SEAL

Our Top Pick for a 1978 Cadillac Eldorado Transmission Band

Invest in a durable Transmission Band for your 1978 Cadillac, knowing you’re getting trusted brands and expert craftsmanship.

ATP – AUTO TRANS BAND (Part No.JX-58)

AUTO TRANS BAND

from

$29.99
AUTO TRANS BAND

Our Automatic Transmission Oil Pump O-Rings for 1978 Cadillac Eldorados

Make a smart move for your 1978 Cadillac Eldorado with our Automatic Transmission Oil Pump O-Ring for $9.59.

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

AT OIL PUMP ORING

from

$9.59
AT OIL PUMP ORING

Top-Rated Automatic Transmission Part Brands For Your 1978 Cadillac Eldorado

When it comes to finding the perfect Automatic Transmission Part for your 1978 Cadillac Eldorado, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 4 trusted brands. We carry the most popular Automatic Transmission Part brands including Pro-King, and more, all known for their exceptional customer ratings (average brand rating of 4.0 stars) and competitive prices, as low as $21.99. Purchasing a Automatic Transmission Part from us here at Advance Auto Parts is a smart move for both you and your 1978 Cadillac Eldorado, providing peace of mind with parts that meet or exceed OEM standards.

Popular Pro-King 1978 Cadillac Eldorado Automatic Transmission Parts

If you’re looking for a top-quality Automatic Transmission Part for your 1978 Cadillac Eldorado, Advance Auto Parts has exactly what you need with our selection of Pro-King Automatic Transmission Parts. We have 2 Pro-King Automatic Transmission Parts in stock for this fitment, all known for their durability and precision fit. With prices starting at just $21.99 and an average cost of $27.99, you’ll find the perfect Automatic Transmission Part for your needs and budget. Pro-King Automatic Transmission Parts for the 1978 Cadillac Eldorado come highly rated, with over 22 customer reviews and an impressive average rating of 4.0 stars. Choosing a Pro-King Automatic Transmission Part from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Automatic Transmission Vacuum Modulator
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”
Automatic Transmission Vacuum Modulator
from $21.99
(11)
Automatic Transmission Vacuum Modulator
“Great product”

FAQs for 1978 Cadillac Eldorado Automatic Transmission Parts

What are the best-selling Automatic Transmission Parts for 1978 Cadillac Eldorados?

Out of 11 Automatic Transmission Parts that fit 1978 Cadillac Eldorados, the following parts are the top sellers:

What’s the price range for 1978 Cadillac Eldorado Automatic Transmission Parts?

The prices of Automatic Transmission Parts for the 1978 Cadillac Eldorado range from $4.29 up to $68.99 for the most premium parts.

What is the average price of an Automatic Transmission Part for a 1978 Cadillac Eldorado?

The average price for Automatic Transmission Parts for the 1978 Cadillac Eldorado is $27.11. 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 Cadillac Eldorado model years?

Yes, we carry Automatic Transmission Parts for 37 model years of Cadillac Eldorados between 1964 and 2002. The following model years are the most popular for Automatic Transmission Part purchases: 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, and 1994.

What are the cheapest Automatic Transmission Parts for my 1978 Cadillac Eldorado?

The cheapest 1978 Cadillac Eldorado Automatic Transmission Parts we carry are:

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

Yes. We stock Automatic Transmission Parts for 3 other popular 1978 Cadillac models. Some of the most popular are 1978 DeVille Automatic Transmission Parts, 1978 Seville Automatic Transmission Parts, 1978 Fleetwood Automatic Transmission Parts, and 1978 Commercial Chassis Automatic Transmission Parts.

What are the top-rated Automatic Transmission Parts that fit the 1978 Cadillac Eldorado?

Based on 48 reviews by customers, our 1978 Cadillac Eldorado Automatic Transmission Parts have an average customer rating of 5 stars. These are the highest-rated categories of Automatic Transmission Parts for the 1978 Cadillac Eldorado and their top-rated products:

What types of Automatic Transmission Parts do you sell for my 1978 Cadillac Eldorado?

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

Can I get help with 1978 Cadillac Eldorado 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 Cadillac Automatic Transmission Parts and more.

What is your return policy for Cadillac Eldorado Automatic Transmission Parts?

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