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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Key Specs

MFG. Part #91628929
BrandSpeedway Motors
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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

Speedway Motors 91628929 Specifications

KEY SPECS
MFG. Part #91628929
BrandSpeedway Motors
GENERAL
Material TypeAluminum
Weight8.45 lbs.
NotesAdapter plate is aluminum. HOSE OR FORK SIDE OPENING: 2-1/4 X 2 INCH
Sold in QuantityKit

Ratings & Reviews

4.9

7 Reviews

Overall Assessment

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

6 Questions • 7 Answers

What kind of transmission is a T-5?

by Nick

• 6 years ago

1 answer

Would this particular adapter plate work with a Turbo 350 Trans?

by Nick

• 6 years ago

1 answer

what is the large threaded hole in the aluminum adapter for?

by skinny

• 7 years ago

1 answer

Does this adapter kit require the use of your diaphragm pressure plate?

by Skinny

• 7 years ago

1 answer

Will this work with a mustang T5

by Corey

• 8 years ago

2 answers

What's the bolt dimensions across the top for transmission and top to bottom bolt holes?

by Tom

• 8 years ago

1 answer

6 of 6 questions shown

Fitment

  • 221 Ford Flathead V8

  • Ford Flathead V8 17 Stud 221 18

  • Ford Flathead V8 21 Stud 221 40

  • 136 Ford Flathead V8

  • 221 Ford Flathead V8

  • 136 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 136 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 136 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 136 Ford Flathead V8

  • 221 Ford Flathead V8

  • 136 Ford Flathead V8

  • 221 Ford Flathead V8

  • 136 Ford Flathead V8

  • 221 Ford Flathead V8

  • 136 Ford Flathead V8

  • 221 Ford Flathead V8

  • 136 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 136 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

Customer Impersonation Script