Speedway GM Manual Trans to Flathead V8 Adapter, Ford Clutch

#91628912

Speedway GM Manual Trans to Flathead V8 Adapter, Ford Clutch

Name: Speedway GM Manual Trans to Flathead V8 Adapter, Ford Clutch
Brand: Speedway Motors
SKU: 91628912
Price: 348.99 USD
Availability: InStock
Rating: 4.6 (7 reviews)

7 Reviews

12 Questions

Get more performance and drivability out of your Ford Flathead V8
This adapter allows you to easily install a GM 3-, 4-, or even 5-speed transmission
Permits use of your Ford clutch release shaft, fork, and throwout bearing

Type:

Speedway

Offenhauser

$348.99

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Product Summary

3.875" Overall Width, 0.5" Overall Thickness, Aluminum

Get more performance and drivability out of your Ford Flathead V8
This adapter allows you to easily install a GM 3-, 4-, or even 5-speed transmission
Permits use of your Ford clutch release shaft, fork, and throwout bearing
Throwout bearing must be used with a long-style pressure plate
Adapts GM manual transmission to Flathead Ford/Mercury V8's

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Key Specs

MFG. Part #	91628912
Brand	Speedway Motors
Material Type	Aluminum
Finish	Natural

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Need To Know

Need help?

855.313.9176

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Installation Details

Bellhousing Adapters Installation Instructions (91628912)

Installation Tips

Uses Flathead pressure plate, flywheel and throwout bearing.
Clutch disc should match transmission being used.
If used with a Chevy S10 T-5, you will need the following:
- Throwout bearing adapter sleeve 916-29517
- Flathead-style release bearing 910-25620
- GM T-5 Installation Notes (PDF)
If used with a GM 3- or 4-speed, you will need the following:
- Bushing and throwout bearing kit 916-29500
Included pilot bushing adaper I.D. is 0.590", .660" O.D., and length is .790"

Additional Install Info:

Using a 9" or larger Long-style pressure plate with counterweights requires removing material from the inside of the adapter for clearance. Interference can cause clutch or release arm binding.
Works with stock release shaft or Speedway #91675100 / #91675101 and release bearing #91025620.
Clutch disc must match Long-style pressure plate diameter and transmission spline count

Speedway Motors 91628912 Details

Get more performance and driveability out of your Ford Flathead V8 by hooking it up to a GM manual transmission! This adapter allows you to easily install a GM 3-, 4-, or even Early T-5 GM-style 5-speed manual transmissions (Not Compatible With: later 1993+ S10/NV1500 units) behind your 1932-1948 Ford or 1939-1950 Mercury Flathead V8 engine.

Permits use of your Ford clutch release shaft, fork and throwout bearing. Throwout bearing must be used with a Long-style pressure plate.

Fits 1932–48 Ford, 1939–50 Mercury Flathead V8s
1948 Trucks and 1949–53 Ford/Mercury need OEM 3" adapter bellhousing
Adapts GM 3-speed, 4-speed, or Early GM-style 5-speed manual transmissions (Not Compatible With: later 1993+ S10/NV1500 units)
Uses stock Ford clutch release shaft, fork, and throwout bearing
Compatible only with 3-finger Long-style pressure plates and stock-style throwout bearings.
Diaphragm-style pressure plates will not work.
Includes pilot bushing adapter

NOTE - If you are still using the stock rear axle assembly, an open-drive conversion will be required. Depending on the year and style of your differential, Speedway Motors offers several kits to assist with this conversion:

Part # 919-1105 – 1935–48 Ford 6-Spline V8 Banjo Rear End Open Drive Conversion Kit (fits ’35–’48 rear axles with common 6-spline pinions)
Part # 919-1106 – 1935–48 Ford 10-Spline V8 Open Drive Conversion Kit (fits ’35–’48 rear axles with common 10-spline pinions)
Part # 919-1111 – 1928–31 Ford Model A Open-Drive Driveshaft Conversion Kit

Once the conversion is complete, a custom driveshaft will need to be installed. Speedway Motors offers Part # 910-383, a Universal Steel Custom Length Driveshaft Kit with a 3-inch OD. Other diameter and material options are also available to accommodate a wide range of applications.

Application

1932–1948 Ford Flathead V8
1939–1950 Mercury Flathead V8

Charts

Installation Notes (PDF)

Specs

1" thick mounting flange
Adapter is 3-7/8" thick front-to-back
Bellhousing mount holes are drilled for 3/8" bolts
Transmission mounting holes are tapped 7/16-14
8-1/4" center-to center top bolt holes
9-1/8" center-to-center bottom bolt holes
4-7/8" center-to-center bottom bolt to top bolt, either side
Pilot bushing adapter I.D. is 0.590", .660" O.D., and length is .790"

Guides & Documents

Bellhousing Adapters Installation Instructions (91628912)

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

Speedway Motors 91628912 Specifications

KEY SPECS
MFG. Part #	91628912
Brand	Speedway Motors
Material Type	Aluminum
Finish	Natural

GENERAL
Overall Width	3.875"
Overall Thickness	0.5"
Outside Diameter	13.125"
Inside Diameter	4.675"
Shaft Diameter	0.875"
Shaft Length	10.048"
Color	Natural
Notes	Use your Ford clutch release shaft, fork and throwout bearing. Throwout bearing must be used with a Long-style pressure plate. Includes pilot bushing adapter.
Sold in Quantity	Each

Ratings & Reviews

4.6

7 Reviews

Overall Assessment

Customers generally appreciate the product's quality, perfect fit, and fine finish. Many praised its exceptional machine work and reasonable pricing, preferring it over competitors. Customers find it especially suitable for T10 4-speed and 46 Ford flathead, with great adjustability. However, the product may require additional modifications for the fitting of a throw-out bearing return spring, which could be challenging for non-professional users. Despite minor issues, customers would still repurchase the product due to its overall performance and quality.

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4.6

7 reviews

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Sort Reviews

I would buy this again

5.0

a year ago

Freddyfairlane

Winnipeg

Verified

Makes it easy to install a modern transmission

Would Recommend

Beefy adapter plate

5.0

2 years ago

49 Merc

Billings, MT

Verified

Seems life a quality part so far. It's beefier than I thought it would be, which makes mee feel confident in its longevity.

Would Recommend

perfekt

5.0

5 years ago

Bosse

Sweden

Verified

great part

Would Recommend

I would by this product again

4.0

5 years ago

Tom

Innisfail, Alberta, Canada

Verified

No messing around fit perfectly to my T10 4 speed and lined up great to my 46 Ford flathead.

Would Recommend

this is a perfect product

5.0

6 years ago

jean

french

Verified

this parts is very good finish and perfect work a perfect adjustment, price is good ,

Would Recommend

not a bolt on part

3.0

11 years ago

Detroitpops

Detroit mi

Verified

Extremely disappointed in the product web page description. The page NOW states there is no provision for a throw OUT bearing return spring. You have to think up your own design, and drill the case and insert your fix. Not for the"bolt on" crowd. When you drilling that tiny hole, drill another two inch hole , above the small fix hole, to also adjust static pressure, or you can completely UN install the entire trans, to adjust the pressure plate .your choice. Drill a brand new 279.00 adapter. This is for serious mechanics only.

Would Not Recommend

Flathead V8 Adapter

5.0

14 years ago

Scotch Buzzard King

Texas

Verified

Everything is great on this adapter. The machine work is exceptional. It has new bearings already installed for throw-out bearing shaft. The only issue that I had was that the hole for the bearing retainer was smaller than the bearing retainer on my chevy transmission. Bottom line, I would still purchase this item again in a heart beat.

Would Recommend

Showing 7 of 7 reviews

Questions & Answers

12 Questions • 12 Answers

Sort Questions

My kit did not come with the mentiond pilot bearing bushing. How do I go about purchasing or obtaining another one? I cant seem to find a part number for it.

by Dangerous47

• 7 years ago

1 answer

View Answer

I want to put a Ford 302 V8 with a 5 speed manual transmission in my 1931 model AA truck I will need to upgrade rear end also. What do I need.

by Neil

• 8 years ago

2 answers

View Answers

Is this the adapter I need to bolt a gm saginaw to a 1950 ford flathead? all I see is " 1932-1948 Ford or 1939-1950 Mercury "

by kb

• 9 years ago

1 answer

View Answer

How tall is this bell housing? (from block mounting surface to tranny mounting surface)

by Hooper

• 9 years ago

2 answers

View Answers

Will this bellhousing adapter fit between a 1950 flathead V8 and 1993 Borg Warner T5 WC S10 (1352-221) or do I need something else? Regards Roar Begby

by Roar

• 10 years ago

1 answer

View Answer

will this adapter fit a 1937 V8-60? i want to do a 5 speed manual to the V8-60 but unsure if its compatible to do so.

by Steve

• 11 years ago

1 answer

View Answer

3.Clearancing to the inside of the bellhousing is required if using a 9 inch or larger Long-style pressure plate that contains counterweights is stated in the notes, does this mean that material will need to be removed from the adapter for clearance? I have this installed and the throw-out bearing release arms are binding on the adapter, does the "clearancing" previously mentioned mean that I will need to remove material from the adapter to allow the clutch to spin freely inside the adapter, this will not be and issue, just do not want any additional issues. this is a 1950 ford with a 4" crank in a 40 Sedan with a T5 tranny. Thanks

by wlr40

• 12 years ago

1 answer

View Answer

1948 merc bell housing advice? I am trying to do the conversion on my 1948 mercury but can't get the housing off to change my flywheel. Do I have to remove the oil pan?

by Tinpit

• 12 years ago

1 answer

View Answer

World Class T5 will this adapter fit a S10 26 spline 1 1/16" T5 World Class transmission?

by bhc65

• 12 years ago

1 answer

View Answer

what size bolts are in the adaptor

by jake52

• 13 years ago

1 answer

View Answer

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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

221 Ford Flathead V8

1939-1940 Ford 1 Ton Pickup

239 Ford Flathead V8

1941-1947 Ford 1 Ton Pickup

221 Ford Flathead V8
239 Ford Flathead V8

1932-1938 Ford 1/2 Ton Pickup

221 Ford Flathead V8

1939-1947 Ford 1/2 Ton Pickup

221 Ford Flathead V8
239 Ford Flathead V8

1932-1938 Ford 3/4 Ton Pickup

221 Ford Flathead V8

1939-1947 Ford 3/4 Ton Pickup

221 Ford Flathead V8
239 Ford Flathead V8

1953 Ford Club

255 Ford Flathead V8
337 Ford Flathead V8

1952 Ford Country Sedan

239 Ford Flathead V8

1953 Ford Country Sedan

255 Ford Flathead V8
337 Ford Flathead V8

1952 Ford Country Squire

239 Ford Flathead V8

1953 Ford Country Squire

255 Ford Flathead V8
337 Ford Flathead V8

1953 Ford Crestline

255 Ford Flathead V8
337 Ford Flathead V8

1949 Ford Custom

255 Ford Flathead V8
337 Ford Flathead V8

1953 Ford Customline

255 Ford Flathead V8
337 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

1953 Ford F-100

255 Ford Flathead V8
337 Ford Flathead V8

1953 Ford F-250

255 Ford Flathead V8
337 Ford Flathead V8

1953 Ford F-350

255 Ford Flathead V8
337 Ford Flathead V8

1948 Ford F1

221 Ford Flathead V8
239 Ford Flathead V8

1949-1952 Ford F1

255 Ford Flathead V8
337 Ford Flathead V8

1948 Ford F2

221 Ford Flathead V8
239 Ford Flathead V8

1949-1952 Ford F2

255 Ford Flathead V8
337 Ford Flathead V8

1948 Ford F3

221 Ford Flathead V8
239 Ford Flathead V8

1949-1952 Ford F3

255 Ford Flathead V8
337 Ford Flathead V8

1953 Ford Mainline

255 Ford Flathead V8
337 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

221 Ford Flathead V8

1937 Ford Model 78

221 Ford Flathead V8

1938 Ford Model 81 A

221 Ford Flathead V8

1938 Ford Model 82 A

221 Ford Flathead V8

1938 Ford Model 85

221 Ford Flathead V8

1932-1934 Ford Model BB

221 Ford Flathead V8

1940 Ford Pickup

221 Ford Flathead V8

1953 Ford Ranch Wagon

255 Ford Flathead V8
337 Ford Flathead V8

1932-1938 Ford Sedan Delivery

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

1953 Ford Sunliner

255 Ford Flathead V8
337 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

1953 Ford Victoria

255 Ford Flathead V8
337 Ford Flathead V8

1952-1953 Mercury Custom

255 Ford Flathead V8
337 Ford Flathead V8

1946-1948 Mercury Mercury

221 Ford Flathead V8
239 Ford Flathead V8

1949-1952 Mercury Mercury

255 Ford Flathead V8
337 Ford Flathead V8

1950-1953 Mercury Monterey

255 Ford Flathead V8
337 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