Progress Thread C-4 To 3 Speed Toploader

[Mustang787]

I have a 65 mustang with a 289 and C-4 I want to put a 3 speed toploader in it. Would I have to change the driveshaft or would the splines on it be the same as the C-4

 

[rbohm]

i think the output splines are the same depending on what year of each transmission you are talking about. personally i think that swapping to a T5 would be a better option, you get two more gears, one being an overdrive, which means better flexibility in day to day driving. you can also use a lower rear gear to get more dig off the line, and still cruse on the freeway at a reasonable rpm. and the T5 should also have the same output splines as the C4. if not then you can always pick up the correct output yoke from a variety of sources.

 

[Mustang787]

i think the output splines are the same depending on what year of each transmission you are talking about. personally i think that swapping to a T5 would be a better option, you get two more gears, one being an overdrive, which means better flexibility in day to day driving. you can also use a lower rear gear to get more dig off the line, and still cruse on the freeway at a reasonable rpm. and the T5 should also have the same output splines as the C4. if not then you can always pick up the correct output yoke from a variety of sources.

I agree a T5 would be better but I know where I can get 2 different 3 speed at. one is from 65 mustang with 200 I-6 and the other one is out of a 69 mustang

 

[Mustang787]

I agree a T5 would be better but I know where I can get 2 different 3 speed at. one is from 65 mustang with 200 I-6 and the other one is out of a 69 mustang

the 69 had a 302

 

[WORTH]

I agree with rbohm, or at least a 4 speed. 289 could use all the gears you can give her.