c4 reliability ?

[skinnystangman]

I have c4 with all the upgraded clutches aand steels. Upgraded bands, servos, and a hardened input shaft. it has a manual reverse valvebody and a nice 3500 stall with antibalooning plates. Will it be able to hang with my 331 if its in the 6.50 range?

[GRAYHORSE]

I have c4 with all the upgraded clutches aand steels. Upgraded bands, servos, and a hardened input shaft. it has a manual reverse valvebody and a nice 3500 stall with antibalooning plates. Will it be able to hang with my 331 if its in the 6.50 range?

Mine lasted around 3 years running a little faster than that.
Low 6's to high 5's and they wont last long even with the best shit.

[FX331]

Running 6.40 with a Dynamic Mighty Mite M2 I would only get 50 to 60 runs before the dreaded 2-3 shift flare. The tranny saw minimal street time but just wouldnt hold up past 60 runs on nitrous. I even took it to Joels on Joy in Michigan (rebuilder for Performance automatic) and still had the same results. After the 4'th freshen up I just opted for a Rossler TH400 and never looked back... Car now runs 5.60's and hasent missed a beat!!

[skinnystangman]

Mine lasted around 3 years running a little faster than that.
Low 6's to high 5's and they wont last long even with the best shit.

What was done to yours?

[Txstang1]

I have c4 with all the upgraded clutches aand steels. Upgraded bands, servos, and a hardened input shaft. it has a manual reverse valvebody and a nice 3500 stall with antibalooning plates. Will it be able to hang with my 331 if its in the 6.50 range?

you're good.

[greenbullitt]

I have seen 800rw cars go 140 passes and the clutches still look new. I have recently seen more than that (power wise) and upon inspection not a clutch had slipped. It had an input shaft with some good spline twist, and a convertor sprag that was hating life (at its limits), but clutches looked BRAND new. It all boils down to what you put in them and who builds them.

[FX331]

Wish I could have found that magic tranny... Didnt seem to matter what was dont to mine it just wouldnt hold up...... (Note)..On motor the tranny worked perfect but on a 225 hit.. it was out the window (on the 2-3 shift... My 7500 shifts would flare to 9k plus.

To the OP... RPM is what kills the C4 not power as I understand... Keep the RPM reasonable and it will last you a long time. Also when cruzing keep the rpm reasonable.. aka.. Stay off the highway and you should be fine.

[GRAYHORSE]

What was done to yours?

Everything you could do to a C4. It made about 300 passes before 2-3 flare. Stay off the transbreak! :cool:
Ask Boosted about 5 sec cars and C-4's. They dont last long.

[greenbullitt]

Everything you could do to a C4. It made about 300 passes before 2-3 flare. Stay off the transbreak! :cool:
Ask Boosted about 5 sec cars and C-4's. They dont last long.

that doesnt mean it dosnt happen. Yes, they require more attention than some other trans at that level.

[White90GT]

Yeah, keep the rpms down and it should last. I ran a PA Competition C4 for 3 years running high 10s on the gas and high 11s on motor without ever touching it. Once I stepped up to 6.50s though, I would rebuild about once a year for piece of mind. Keep in mind, I was racing minimum 10 passes a month during that time.