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#91628929
Adapter Plate for T-5 Trans to Ford Flathead with Hydraulic Throwout
- Now you can easily mount a modern, fully synchronized GM manual transmission to your early Ford or Mercury Flathead V8 engine
- Great way to get better drivability and improved performance from your '32-'48 Ford or '39-'50 Mercury Flathead
- Kit includes transmission adaptor, hydraulic throwout, bearing spacer, GM transmission to flathead pilot bushing
$351.99
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Product Summary
T5, Aluminum
- Now you can easily mount a modern, fully synchronized GM manual transmission to your early Ford or Mercury Flathead V8 engine
- Great way to get better drivability and improved performance from your '32-'48 Ford or '39-'50 Mercury Flathead
- Kit includes transmission adaptor, hydraulic throwout, bearing spacer, GM transmission to flathead pilot bushing
- For use with a diaphragm-style pressure plate
- Use with original flathead flywheel - re-drilling of the flywheel for the diaphragm pressure plate bolt pattern may be required
Comes as a Kit
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Speedway Motors 91628929 Details
Now you can easily mount a modern, fully synchronized GM manual transmission to your early Ford or Mercury Flathead V8 engine! This is a great way to get better drivability and improved performance from your 1932-48 Ford or 1939-50 Mercury Flathead.
This aluminum adapter permits the use of most GM-style 3-, 4- or 5-speed Muncie, Borg Warner, Saginaw and T-5 manual transmissions behind your Flathead V8s. Adapter is used in conjunction with Flathead flywheel and hydraulic throwout bearing.
Mounts common Muncie, Borg Warner, Saginaw and T-5 GM style manual transmissions. For use with hydraulic throwout bearing (our part #910-25610). For use with a diaphragm-style pressure plate. Use with original flathead flywheel (re-drilling of the pressure plate bolt pattern may be required)
Kit includes:
- Transmission Adapter
- Hydraulic Throwout
- Bearing Spacer
- GM Trans to Flathead Pilot Bushing
Application
1932-48 Ford or 1939-50 Mercury Flathead (not applicable to the V8-60)
Charts
Guides & Documents
Speedway Motors 91628929 Specifications
Speedway Motors 91628929 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 91628929 |
| Brand | Speedway Motors |
| GENERAL | |
| Material Type | Aluminum |
| Weight | 8.45 lbs. |
| Notes | Adapter plate is aluminum. HOSE OR FORK SIDE OPENING: 2-1/4 X 2 INCH |
| Sold in Quantity | Kit |
Ratings & Reviews
4.9
7 Reviews
The product is praised for its excellent fit, usability & installation simplicity. It efficiently adapts from flathead to standard and T5 transmissions, supporting various clutch setups. Superior to Offenhauser kit, it is commended for impeccable quality and fitting 'like a glove.' Some customers wished for inclusion of a metric stud. Its compatibility with multiple flywheel and master cylinder sizes is highlighted, while proving effective even with parts not recommended by Speedway, enhancing its practicality. Also, recommends including metric studs.
Ratings & Reviews
4.9
7 Reviews
The product is praised for its excellent fit, usability & installation simplicity. It efficiently adapts from flathead to standard and T5 transmissions, supporting various clutch setups. Superior to Offenhauser kit, it is commended for impeccable quality and fitting 'like a glove.' Some customers wished for inclusion of a metric stud. Its compatibility with multiple flywheel and master cylinder sizes is highlighted, while proving effective even with parts not recommended by Speedway, enhancing its practicality. Also, recommends including metric studs.
4.9
7 reviews
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Excellent Product
5.0
4 years ago
Doug Isted
Regina, Saskatchewamn. Canada
Bolted right up - no problem. Hydraulic clutch installation instructions were excellent. Speedway recommends the use of a 3/4 inch bore master cylinder but tried it out with my existing (5/8 inch bore) master cylinder and it works fine. fyi: I used the clutch disk and pressure plate from the doner S10 that I got the T5 transmission from - just had to drill and tap the flathead flywheel to accept the pressure plate.
Would Recommend
Bolted right up! A solution to the problem
5.0
4 years ago
Scotty
Myrtle Beach
Verified
Bolting up the adapter from the flathead to the 5speed T5. Making it simple
I would buy again
5.0
6 years ago
Helluvit customs
Rockford il
Verified
I got this for my project not knowing how it would fit. but it fit perfect to 322 nailhead backed by an offy bell housing
Would Recommend

I would buy again
5.0
7 years ago
Greg
Springfield mo
Verified
Flathead to standard transmissions
Would Recommend
Adapter plate for T-5
4.0
7 years ago
Van Watson
Buda, TX
The stud holes in a Borg Warner T-5 transmission are M8 (metric) and you only supply 5/16 and 3/8 studs. I thing the metric stud should be included as now I have to drive 30 miles round trip to get a metric bolt to make into a similar stud.
Would Recommend
Great part, works perfectly
5.0
8 years ago
Dino's 26T
Saskatoon, Saskatchewan, Canada
Verified
Great part, fantastically made part no need for the Offenhauser kit unless you want the name. fits like a glove. Easy to install with many options for clutch set ups in case I'm not happy with hydraulic throughout bearing. Only thing I didn't like was the hydraulic throughout bearing uses a #2 A/N fitting and didn't like using conversion fittings. But not a big deal
Would Recommend
All good, it does what it's supposed to do...
5.0
9 years ago
Burtzz
Canada
Verified
All good, it does what it's supposed to do...
Would Recommend
Showing 7 of 7 reviews
Questions & Answers
Questions & Answers
6 Questions • 7 Answers
What kind of transmission is a T-5?
by Nick
• 6 years ago
1 answer
View Answer
Would this particular adapter plate work with a Turbo 350 Trans?
by Nick
• 6 years ago
1 answer
View Answer
what is the large threaded hole in the aluminum adapter for?
by skinny
• 7 years ago
1 answer
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Does this adapter kit require the use of your diaphragm pressure plate?
by Skinny
• 7 years ago
1 answer
View Answer
Will this work with a mustang T5
by Corey
• 8 years ago
2 answers
View Answers
What's the bolt dimensions across the top for transmission and top to bottom bolt holes?
by Tom
• 8 years ago
1 answer
View Answer
6 of 6 questions shown
Fitment
Fitment
1932 Ford 1 Ton Pickup
221 Ford Flathead V8
1933-1936 Ford 1 Ton Pickup
Ford Flathead V8 17 Stud 221 18
Ford Flathead V8 21 Stud 221 40
1937-1938 Ford 1 Ton Pickup
136 Ford Flathead V8
221 Ford Flathead V8
1939-1940 Ford 1 Ton Pickup
136 Ford Flathead V8
239 Ford Flathead V8
1941-1947 Ford 1 Ton Pickup
221 Ford Flathead V8
239 Ford Flathead V8
1932-1936 Ford 1/2 Ton Pickup
221 Ford Flathead V8
1937-1938 Ford 1/2 Ton Pickup
136 Ford Flathead V8
221 Ford Flathead V8
1939-1947 Ford 1/2 Ton Pickup
221 Ford Flathead V8
239 Ford Flathead V8
1932-1936 Ford 3/4 Ton Pickup
221 Ford Flathead V8
1937-1938 Ford 3/4 Ton Pickup
136 Ford Flathead V8
221 Ford Flathead V8
1939-1947 Ford 3/4 Ton Pickup
221 Ford Flathead V8
239 Ford Flathead V8
1952 Ford Country Sedan
239 Ford Flathead V8
1952 Ford Country Squire
239 Ford Flathead V8
1939-1940 Ford Deluxe
221 Ford Flathead V8
239 Ford Flathead V8
1946-1948 Ford Deluxe
221 Ford Flathead V8
239 Ford Flathead V8
1948 Ford F1
221 Ford Flathead V8
239 Ford Flathead V8
1948 Ford F2
221 Ford Flathead V8
239 Ford Flathead V8
1948 Ford F3
221 Ford Flathead V8
239 Ford Flathead V8
1932 Ford Model 18
221 Ford Flathead V8
1942 Ford Model 21 A Deluxe
221 Ford Flathead V8
239 Ford Flathead V8
1933-1934 Ford Model 40
221 Ford Flathead V8
1934 Ford Model 40 A
221 Ford Flathead V8
1933 Ford Model 46
221 Ford Flathead V8
1935 Ford Model 48
221 Ford Flathead V8
1935 Ford Model 50
221 Ford Flathead V8
1936 Ford Model 67
221 Ford Flathead V8
1936 Ford Model 68
221 Ford Flathead V8
1937 Ford Model 74
136 Ford Flathead V8
221 Ford Flathead V8
1937 Ford Model 78
136 Ford Flathead V8
221 Ford Flathead V8
1938 Ford Model 81 A
136 Ford Flathead V8
221 Ford Flathead V8
1938 Ford Model 82 A
136 Ford Flathead V8
221 Ford Flathead V8
1938 Ford Model 85
136 Ford Flathead V8
221 Ford Flathead V8
1932-1934 Ford Model BB
221 Ford Flathead V8
1940 Ford Pickup
221 Ford Flathead V8
1932-1936 Ford Sedan Delivery
221 Ford Flathead V8
1937-1938 Ford Sedan Delivery
136 Ford Flathead V8
221 Ford Flathead V8
1939-1942 Ford Sedan Delivery
221 Ford Flathead V8
239 Ford Flathead V8
1946-1947 Ford Sedan Delivery
221 Ford Flathead V8
239 Ford Flathead V8
1942 Ford Super Deluxe
221 Ford Flathead V8
239 Ford Flathead V8
1946-1948 Ford Super Deluxe
221 Ford Flathead V8
239 Ford Flathead V8
1946-1948 Mercury Mercury
221 Ford Flathead V8
239 Ford Flathead V8
1941 Mercury Series 19A
239 Ford Flathead V8
1942 Mercury Series 29A
221 Ford Flathead V8
239 Ford Flathead V8
1939 Mercury Series 99A
239 Ford Flathead V8
1940 Mercury Series O9A
239 Ford Flathead V8
