1978 Mercury Marquis Performance Transmissions
Keep Your 1978 Mercury Marquis in Top Shape with a Quality Performance Transmission
When it comes to maintaining or upgrading your 1978 Mercury Marquis, choosing high-quality parts is crucial for ensuring your vehicle stays in top shape, whether you’re tackling a repair or enhancing performance. At Advance Auto Parts, we know how important it is to find the right Performance Transmission for your Marquis. We currently carry a top Performance Transmission in stock that is built to last. Whether you’re replacing a damaged Performance Transmission or looking to upgrade, our selection for the 1978 Mercury Marquis ensures you’ll find exactly what you need to keep your vehicle looking and performing its best.
Explore Related Parts
And while you’re here, don’t forget to check out related part categories like Performance Distributors and Performance Fuel Systems to complete your upgrade or repair project. At Advance Auto Parts, we’re proud to offer the parts and expertise to keep your 1978 Mercury Marquis running smoothly and looking great.
Find Your Specific 1978 Mercury Marquis Performance Transmissions
Looking for the perfect Performance Transmission for your 1978 Mercury Marquis? You’re in the right place. Below, you’ll find a Performance Transmission from a trusted manufacturer that is a perfect fit for your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Performance Transmissions, ensuring durability and a precise fit for your Mercury Marquis. Whether you’re driving a 1978 model or another popular model year like
1975,
1976,
1977,
1979,
1980,
1981,
1982,
1983, and
1984, we’ve got you covered. Purchasing Performance Transmissions 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 Performance Transmissions that fit your vehicle.
Essential 1978 Mercury Marquis Performance Transmissions
B & M – Shift Improver Kit, 67-91 C6 Transmission (Part No.40262)
from
$77.99
The B&M Shift Improver kit, is the easiest way to get the performance you want out of your transmission. A few simple modifications and your transmission will shift fast, firm and live longer.
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 Shift Kit (Part No.40227)
from
$208.99
Transpak – Ford, Lincoln, Mercury – 1980 to 1992 AOD (excludes 1992 and later with electronic shift). Recalibrate your automatic transmission for optimum performance. Select the mode that best suits your application. Improves transmission life. Transmission removal not required. The next step up from the Shift Improver Kit is the Transpak. It has all the features in the Shift Improver Kit plus it provides additional driver manual control (GM TH-400, 350, Ford C-6 and Chrysler Torqueflite only). Most stock automatic transmissions won’t downshift into low gear above 15 mph, and automatically upshift at a predetermined speed no matter what gear you’re in. With the Transpak, you can downshift at any speed, and you can hold the transmission in first gear to any speed that you want! This is an asset when you’ve got a modified engine, and you want additional RPMs, or you’re towing a trailer or driving heavy loads downhill. Stage 1 Heavy Duty – For street rods, normal passenger vehicles or other heavy duty use. Firmer shift feel but not harsh. Improves transmission performance and life dramatically without loss of comfort. Normal automatic operation when in Drive. Stage 2 Hi-Performance Street – For full performance street use. Essentially the same as Heavy Duty mode except shift is much quicker. 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
B & M – Transpak (Part No.50229)
from
$149.99
Transpak – 1970 to 1982 Ford, Lincoln, Mercury C4 Recalibrate your automatic transmission for optimum performance Select the mode that best suits your application Improves transmission life Transmission removal not required APPLICATION: 1970 to 1982 Ford,
Product Features:
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Product Features:
- Recalibrate Auto. Transmission
- Optimum Performance
- Select Your App. Mode
- Improves Transmission Life
- Trans. Removal Not Required
Popular 1978 Mercury Marquis Performance Transmissions Categories
Most Popular Performance Transmission Shift Kit for 1978 Mercury Marquis
Enhance your 1978 Mercury Marquis with this popular Performance Transmission Shift Kit we have in stock, for $77.99.
B & M – Shift Improver Kit, 67-91 C6 Transmission (Part No.40262)
from
$77.99
The B&M Shift Improver kit, is the easiest way to get the performance you want out of your transmission. A few simple modifications and your transmission will shift fast, firm and live longer.
Product Features:
See More
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
FAQs for 1978 Mercury Marquis Performance Transmissions
What’s the price range for 1978 Mercury Marquis Performance Transmissions?
We currently have just one Performance Transmissions for the 1978 Mercury Marquis in stock: Shift Improver Kit, 67-91 C6 Transmission and it costs $77.99.
Does Advance Auto Parts sell Performance Transmissions for other Mercury Marquis model years?
Does Advance Auto Parts sell Performance Transmissions for any other 1978 Mercury models?
Yes. We stock Performance Transmissions for 4 other popular 1978 Mercury models. Some of the most popular are 1978 Cougar Performance Transmissions, 1978 Grand Marquis Performance Transmissions, 1978 Bobcat Performance Transmissions, 1978 Monarch Performance Transmissions, and 1978 Zephyr Performance Transmissions.
What are the top-rated Performance Transmissions that fit the 1978 Mercury Marquis?
The one 1978 Mercury Marquis Performance Transmission we have in stock is the Shift Improver Kit, 67-91 C6 Transmission. It is rated 3 stars and costs $77.99.
What types of Performance Transmissions do you sell for my 1978 Mercury Marquis?
We currently have just 1 Performance Transmission in stock for a 1978 Mercury Marquis, and as of 11/2/25, it is a Performance Transmission Shift Kit.
Can I get help with 1978 Mercury Marquis Performance Transmission orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mercury Performance Transmissions and more.
What is your return policy for Mercury Marquis Performance Transmissions?
Advance Auto Parts keeps returns simple. For new Mercury Marquis Performance Transmissions and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.