[jakes01234]

As i was gathering information on the c4 that is in my galaxie i ran across a problem finding parts for a 64 c4. I asked a vendor and he said the 64 c4 cant handle the power of the 65 and up.
Can anyone tell me what the main difference was?
I know that its a 5 bolt instead of the 6 bolt but beyond that im lost..
I just want to know what makes it so weak compared to the 1965 + tranny...

Thanks for your help

 

[FEandGoingBroke]

Number of clutches in the pack I believe, and that trans can be fitted for the 5th disc and improved to handle your modern engine.

 

[mmerlinn]

Partial list of parts that are 1964 only:

Case - Small servo pin hole
Servo - Small servo pin
High drum - Shorter
Drive shell - Longer
Output shaft - 3/4" front splines
Planet - Not machined for bushing
Front ring gear support - No bushing
Bell housings - 170 CID Van (Extra threaded boss), 223 CID
Tail housings - Donut hanger mount
Valve body

 

[FEandGoingBroke]

Wow, far more than I thought. Easy rebuild though (I did mine once) and it's still going. If you're "RACING" then get a later one if you're just driving around and hot rodding then rebuild it and go. It lasted almost 50 years as is don't ya think that's tough enough?

 

[Hottarod]

The C4 was beefed up again in 70? but I don't know all the parts involved. That, I believe, is when they switched to the 26 spline input shaft. Having snapped 2 24 spline shafts it became somewhat important to me on my drag car. The one I have in there is some aircraft steel 26 spline job. They said if I break that one they will give me a new one free.

 

[jakes01234]

the trans was rebuilt about 15 years ago by this guy
DANNY ODAY sets Wheelstander record at 8.64!

Im sure it wasnt anything special just a common rebuild..

So is this thing going to pop when the 289 starts revving and making 300 HP?

I dont do alot of off the line hard acceleration its mostly getting on the highway and passing here and there..