Bulitproof C4

[MStang66]

Bulletproof C4

Hey everyone i'm new on here i'm getting ready to start to rebuild a C4 for my 66, i was going to do a manual swap, but for now i'm going to keep it an auto.

The basic plan is to get a select shift C4 out of a 68, and rebuild it into a basically bulletproof C4 for the car.

I'm just wondering if anyone has any ideas about modifications to the trans?
any suggestions or upgrades would be helpful

Thanks

 

[brianj5600]

How much power does the bullet have? I would start with a 71+ trans or even better a C5 with C4 valvebody and bell.

 

[MStang66]

How much power does the bullet have? I would start with a 71+ trans or even better a C5 with C4 valvebody and bell.

I want to keep it some what original. right now its a stock 289 with few mods.
in the next year it should be getting a cam. i just don't want this trans to fail and maybe add some performance.

 

[blown65]

I believe you can purchase the PA internals and make a pretty strong C4. I have a good 200-250 passes on mine and it's been perfect.

 

[brianj5600]

Up to about 400hp the early stuff is fine. The later C4 has a bigger input shaft, but not needed until 375-400. People have used them at higher levels, but most don't consider them bullet proof above 400. You would probably do fine with a healthy stock C4 with a good shift kit. If it is a V8 C4 it should have 4 frictions in both drums. Above 400 you need extra clutches in both drums. Mine has 5 in the forward and 6 in the high drum. Above 500hp roller bearings instead of thrust washers are a good idea, and above 600hp they are pretty much mandatory. Here is the best info on C4s on the web IMO. Monster C4 Thread Text - Edited (Way Long) Version2 - FordMuscle.com Forums

Are you building it or buying one built?