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Shop Speed Gems' Kits

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Bellhousings

Bellhousings

Shop Popular Replacement Parts

AP10004 - Adapter Plate Ford Modular to Chevy
AP10004 - Adapter Plate Ford Modular to Chevy
$650.00

AP10004 - Adapter Plate Ford Modular to Chevy

bellhousings
BH10002  1957-1963 Buick Nailhead to GM 4-and 5-Speed Bellhousing
bellhousings
BH10002  1957-1963 Buick Nailhead to GM 4-and 5-Speed Bellhousing
$395.00

BH10002 1957-1963 Buick Nailhead to GM 4-and 5-Speed Bellhousing

BH10003  Oldsmobile & Cadillac Bellhousing
BH10003  Oldsmobile & Cadillac Bellhousing
BH10003  Oldsmobile & Cadillac Bellhousing
BH10003  Oldsmobile & Cadillac Bellhousing
$395.00

BH10003 Oldsmobile & Cadillac Bellhousing

BU801  Buick Flexplate and Adapter for 1963 & Older Buick 364 to 1964 & Newer Automatic Transmission
BU801  Buick Flexplate and Adapter for 1963 & Older Buick 364 to 1964 & Newer Automatic Transmission
$275.00

BU801 Buick Flexplate and Adapter for 1963 & Older Buick 364 to 1964 & Newer Automatic Transmission

BU802  Buick Flexplate and Adapter for 1963 & Older Buick 401/425 to 1964 & Newer Automatic Transmission
BU802  Buick Flexplate and Adapter for 1963 & Older Buick 401/425 to 1964 & Newer Automatic Transmission
$275.00

BU802 Buick Flexplate and Adapter for 1963 & Older Buick 401/425 to 1964 & Newer Automatic Transmission

FP10001  Flexplate & 168-tooth Ring-gear - Chevy 216/235/261 to V8-style Transmission
FP10001  Flexplate & 168-tooth Ring-gear - Chevy 216/235/261 to V8-style Transmission
$109.99

FP10001 Flexplate & 168-tooth Ring-gear - Chevy 216/235/261 to V8-style Transmission

FP10002  Flexplate (w/ small-hole) & 166-tooth Ring-gear - Buick Nailhead 364/401/425 to Chevy Automatic Transmission
FP10002  Flexplate (w/ small-hole) & 166-tooth Ring-gear - Buick Nailhead 364/401/425 to Chevy Automatic Transmission
$183.99

FP10002 Flexplate (w/ small-hole) & 166-tooth Ring-gear - Buick Nailhead 364/401/425 to Chevy Automatic Transmission

FP10004  Flexplate & 143-tooth Ring-gear - GM Applications
FP10004  Flexplate & 143-tooth Ring-gear - GM Applications
$109.99

FP10004 Flexplate & 143-tooth Ring-gear - GM Applications

Shop Popular Speed Gems Kits

CH301  Chevy 216/235/261 to Chevy Automatic V8 Transmission
CH301  Chevy 216/235/261 to Chevy Automatic V8 Transmission
CH301  Chevy 216/235/261 to Chevy Automatic V8 Transmission
CH301  Chevy 216/235/261 to Chevy Automatic V8 Transmission
CH301  Chevy 216/235/261 to Chevy Automatic V8 Transmission
CH301  Chevy 216/235/261 to Chevy Automatic V8 Transmission
$1,150.00

CH301 Chevy 216/235/261 to Chevy Automatic V8 Transmission

FO301 FORD Y-BLOCK
FO301 FORD Y-BLOCK
$1,350.00

FO301 FORD Y-BLOCK 239/252/272/292/312 TO FORD SMALL BLOCK AOD/C5/C6

FO201FordFE352
FO201FordFE352
$1,350.00

FO201 FORD FE 352/360/390/406/427 TO FORD SMALL BLOCK AOD/C5/C6

FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)
FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)
FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)
FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)
FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)
FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)
FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)
FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)
FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)
FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)
FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)
$1,895.00

FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)

Why Speed Gems

At Speed Gems, we don’t just sell transmission adapter kits – we provide the foundation for your vehicle’s performance, reliability, and longevity. Here’s why thousands of car enthusiasts and professionals trust us:

Precision Engineering: Our kits are crafted with high-quality USA-made aluminum and steel, ensuring your transmission runs smoothly and reliably, every time.

Unmatched Expertise: With years of industry experience, we know what it takes to keep your vehicle running at its best. Our team is here to provide expert advice and support whenever you need it.

Worldwide Shipping: No matter where you are, we’ve got you covered with fast, trackable worldwide shipping. Your kits will arrive quickly and safely, ready to install.

Trusted by Car Enthusiasts: Our products are highly respected in the automotive world. From hobbyists to professional mechanics, we’ve built a reputation for reliability and quality.

Customer-First Support: Got a question? Our team is just a phone call away. We pride ourselves on delivering top-notch customer service, helping you every step of the way.

Explore ProductsCall 763-767-4480
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Our Video Gallery

Speed Gems Ford FE Transmission Adapter Kit Installation

Speed Gems Ford FE Transmission Adapter Kit Installation

Speed Gems Ford FE Transmission Adapter Kit Installation

Our Customers Speak Highly Of Us.

Jeff J., M.D.

I am totally impressed by the design and machining on these pieces. I was a certified tool-and-die maker for seven years and have three degrees (BS, M. Eng, PhD) in mechanical engineering along with a Professional Engineering license before becoming a medical doctor. It takes A LOT to impress me. Your products are excellent. I have several other old classic cars I want to update to modern transmissions as well

Tom T.

Chris, it was great talking to you the other day when I ordered my kit. I received my adapter kit to install my AOD transmission to my 312 Y blockI I could not be happier with the quality of the components and the speed of shipping. Thank you so much!"

Brian C.

I refer many people to your product as I have personally used the PA kit and experienced several of the PA design faults on my own Bronco. Thanks for your prompt reply. Looking forward to using your kit on my other Bronco.