Flathead V8 to Ford C4 Auto Transmission Conversion Kit
Flathead V8 to Ford C4 Auto Transmission Conversion Kit
Speedway Motors

|

#91028906

Flathead V8 to Ford C4 Auto Transmission Conversion Kit

  • Update to a modern C4 automatic transmission. Fits Ford'49-'53 8BA or Mercury 8CM flathead engine without integral bellhousing
  • Hughes C4 automatic transmission and Flathead torque converter
  • Lightweight flexplate and 2400-2600 rpm stall torque converter does wonders for a flatheads throttle response and stop-and-go driving
See More

$4,532.99

/kit

In Stock

$4,601.93

Save $68.94


Quantity

Need Help? Call to Order

Add to a list

Share

Select a vehicle and engine to verify Fitment

Select Vehicle

Select Engine

Product Summary

C4, Three Number of Gears, Torque Converter Included

  • Update to a modern C4 automatic transmission. Fits Ford'49-'53 8BA or Mercury 8CM flathead engine without integral bellhousing
  • Hughes C4 automatic transmission and Flathead torque converter
  • Lightweight flexplate and 2400-2600 rpm stall torque converter does wonders for a flatheads throttle response and stop-and-go driving
  • Handles up to 550 HP with Street/Strip Valve Body - everyday street driving and weekend trips to the drag strip
  • Improved Lubrication Circuits equals reduced heat/prolonged life

Comes as a Kit

View Kit Components

See more details

Key Specs

MFG. Part #91028906
Input Shaft Spline Count26
FinishPainted
SFI Rating30.1
Flexplate IncludedYes
See more specs

Need To Know

Truck Shipment

Truck shipments must be pre-paid with a credit card, certified check or money order

Need help?

855.313.9176
View the Help Center

Quick and Easy Returns

Return Policy

Speedway Motors 91028906 Details

Adapt your 1949-1953 Ford flathead V8 engine to a modern Ford C4 automatic transmission. This complete C4 transmission conversion kit is an excellent upgrade for early Ford drivetrains – the lightweight flexplate and torque converter does wonders for a flatheads throttle response and stop-and-go driving. This kit includes Hughes 26-1 SS C4 automatic tranmission, completely remanufactured with heavy duty clutches, special shift kit, torque converter, engine adapter, special flexplate, modified 12-volt starter, hardware, and instructions.

  • For Ford C4 transmission application
  • Rated up to 550 HP
  • 11.5" bolt circle 2400-2600 rpm stall torque converter
  • Firm, crisp shifts from Kevlar high performance bands and heavy duty clutches
  • Street/Strip Valve Body - everyday street driving and weekend trips to the drag strip
  • Billet 6061 T6 Aluminum C4 Pro Shift Servo - extends clutch and band life
  • Improved Lubrication Circuits - reduced heat/prolonged life
  • SFI 30.1 Small Block Ford bellhousing - for 164 tooth flexplate
  • New steel transmission pan, Pan-Fill style for dipstick application (dipstick not included -suggested # 362-65235) 

Note: Must be used with open drive rearend (not included). Cooler, shifter, and chrome dress-up parts are sold separately. Fill tube and dipstick are not included. Also, the 6 gear planet is NOT used in this transmission.

 

Kit Includes:

(1) Hughes 26-1 SS C-4 Automatic C4 Transmission, 1970-80, 26 Spline

(1) Flathead-C4, Adapt & Hardware

(1) Flexplate Flathead to Ford C4 Transmission

(1) 1949-1953 Ford Flathead C4/AOD Replacement Starter, 12V

(1) Ford 289-351W C4-AOD Transmission Block Plate

(1) Hardware Kit

(1) Hughes Performance F42-FLATTY C4 Flathead Torque Converter

 

Application

  • 1949-1953 Ford 8BA and 8CM Mercury Flathead V8 engines without integral bellhousing

Charts

Specs

  • 164-tooth flywheel included
  • 2400-2600 stall converter included
  • 12 volt negative ground starter included

Speedway Motors 91028906 Specifications

KEY SPECS
MFG. Part #91028906
BrandSpeedway Motors
Input Shaft Spline Count26
FinishPainted
SFI Rating30.1
Flexplate IncludedYes
GENERAL
Number of GearsThree
Transmission Advertised Horsepower Rating550
Torque Converter IncludedYes
Advertised Flash Stall Rating2,400-2,600 rpm
Transmission Pan MaterialSteel
Transmission Pan FinishNatural
Dipstick IncludedNo
Sold in QuantityKit

Ratings & Reviews

4.4

5 Reviews

Overall Assessment

Customers confirm the reliability of our product, notably appreciating its compatibility with various engine models. They vouched for its sturdy construction, easy installation, and accurate alignment. The kit has been praised for comprehensiveness, requiring minimal modifications for fitting. Despite not having used our product yet, one customer appreciated its organized packaging and superior quality compared to others. Our product is recommended for its practicality, ability to significantly upgrade performance and trustworthiness for major restoration projects.

Write A Review

4.4

5 reviews

5

2

4

3

3

0

2

0

1

0

Filter by Ratings

Tranny install was about as expected.

4.0

5 years ago

Biggyrat

Natchez la

Verified

Sunday driver restored 1951 Victoria ..Bored and stroked,mild cam ,polished heads and intake .two stromberg 97 carbs..Original Fordomaticnot up to the task.

Would Recommend

Service good all round

4.0

7 years ago

Dave

British Columbia

Verified

Product was as expected, and the service to get the product was great.

Would Recommend

Everything went together as planned!

5.0

9 years ago

Big Hammer

Port St Lucie, Fl

Verified

I didn't get to drive it yet, but everything seems to be as described!

Would Recommend

Customer review image

This kit was just great would buy again

5.0

9 years ago

Corky

Utah

Verified

didn't need to add any parts bolted right into my 1953 ford. Was able to use the original trans. crossmember with just a little modification. Instructions where good on the grinding of the engine block for starter to fit.

Would Recommend

So far so good

4.0

11 years ago

Jim K

Salina KS

Verified

So I have not installed C-4 trans yet a winter project and the Engine/ flathead is being upgraded to an 276 stoker and should be back from United Engines in Wichita in 90 days or so. So I have not used the adapter yet. However the Kit came in a nice box on a pallet with all the part you said were their. I have no problems with speedway motors I have purchase a lot of parts from them and their when you call. thanks you Jim

Would Recommend

Customer review image

Showing 5 of 5 reviews

Questions & Answers

22 Questions • 14 Answers

How is this kit shipped? By freight or normal carrier? My street is not able to handle large freight trucks. Secondly , is this on true backorder or is it available but just need to call to order? Thanks

by Brian

• 6 years ago

1 answer

View Answer

Does this require/ will the transmission perform better with a vacuum modulator? Like TCI 260101. ?

by Bruce

• 7 years ago

1 answer

View Answer

will this kit work on 1951 mercury that has merc o matic transmission

by rich

• 7 years ago

1 answer

View Answer

I want to install your c4 on my 1953 ford Victoria but I have 6v positive ground that I don't want to change. would my 6v starter fit on the c4? or is there a better 6 volt starter that will fit the c4 transmission.

by my vicky

• 7 years ago

1 answer

View Answer

what is the order number for the torque converter?

by Craig

• 7 years ago

1 answer

View Answer

Will this system work with a 1950 Mercury Coupe?

by Donnie

• 8 years ago

3 answers

View Answers

will this fit in a F1 pickup? is it to long for the driveshaft ?

by Sharp

• 8 years ago

1 answer

View Answer

I plan on using this kit in a '50 ford sedan and I was wondering what your suggestion is regarding differential gear ratio and what later model rear end would best fit for all around driving.

by Bob

• 8 years ago

1 answer

View Answer

Will this kit work in a 1950 Ford convertible with x member frame?

by Richard

• 8 years ago

1 answer

View Answer

Will this setup work with a spring on top banjo rear (if converted to open drive)? My concern is the pinion angle.

by Johnnyo

• 9 years ago

3 answers

View Answers

Load More Questions

10 of 22 questions shown

Fitment

  • 226 Ford Inline 6

  • 226 Ford Inline 6

  • 226 Ford Inline 6

  • 226 Ford Inline 6

  • 226 Ford Inline 6

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 226 Ford Inline 6

  • 226 Ford Inline 6

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

Customer Impersonation Script