WHAT TRANNYS WILL FIT ON A '48 FLATHEAD V8 59AB ENGINE?

 

You can use a C4, or a T5 5-Speed trans from an 83 to 88 S-10 truck or Blazer.

 

The above will fit, but you need adaptors, they are not just bolt ons without the adaptors. You looking for stock trans or a later more modern trans? For the adaptors, check out www.flat-o.com

 

I just finushed installing a 89 S10 5-speed in my 51 F1. If you go that route I'm sure you will be happy and quite as impressed with the difference as I'am.

Rod 51 F1

 

will a 5speed from a 84 thunderbird turbo coupe work on the flathead anyone tryed this???

 

Don't quote me on this, but from what I understand you can mix-match t5 innards to achive what you want providing you have the resources to do so. I believe the input shaft might be different on the T-bird unit. If so, you might be able to swap it for an S10 input shaft. All else, the trans case demisions and mounting are all the same. Except the T-bird has the shifter location further back that the S10's do.