I have a 91 Coupe with a mild 302. Runs right at 290 hp. I have went through 3 C4 auto trannies in the last year. The first was a junker I bought for $100 just so I could play with the car before it was finished. It lasted a few months. The second was a reman. tranny I got for $450 and it started leaking from the front seal after about 4 months , so I took it back to advanced auto and got another from the warranty .The 3rd was the reman. tranny I got from Advaced auto . It started leaking after about 4 months out of the front seal , and the little seal on the shifter linkage. I don't beat up on it , I mean I don't gun it all the time or anything. Sometimes when I pull out onto the highway I manual shift it so I can get up to speed. but I don't let the rpm's get way up before I shift. Also I have noticed that ALL 3 of the trannies made a loud "clank" sound when I put them into reverse , or tap the gas while i was moving very slow. My engine idles So here are my questions.

1. Is manually shifting a C4 bad for it even if you are easy on the rpms?

2. Do Advaced auto's reman. trannies suck , or do i just need a stronger one?

3. Do I need to upgrade to a street / strip C4?

4. Is this "clank" sound a product of the transmissions , or possibly the u joint/ driveshaft play? Sometimes it sounds like it comes from below my seat , sometimes it seems to be farther back. I do see any other reason the would all do this.

Thanks for any help , sorry if I made any stupid comments , as I am not an expert on transmissions.

 

Hold on. Let me get this straight. You had a auto tranny and you used it like a manual [:@]. If you want a manual then just get one. You might screw up your tanny like that, but you shouldn't have. I'm not an expert on C4's sry.

 

thanks for your help man....... lmfao. Ever notice the 1-2-D on an auto before? those are there for a reason such as , hell i dunno , maybe manual shifting or something ? Like when you are pulling into traffic and need more out of 1st and 2nd gears , or going up steep hills. And since my B&M shifter (Specifically for the C4) has a special ratchet shifting mode, i was under the impression that I might be able to, call me crazy , manual shift it or something . I was asking someone who knows about C4 trannies to help me diagnose my problem , and tell me how well a stock reman. C4 would stand up to a 290 hp engine when it is manually shifted every once in a while. I have a 87 Ranger with the most god awful tranny known to man , the infamous A4LD, and I have manually shifted every time I've driven it for going on 8 years . It works like a dream. Same case with my mustang before i put in the 302 , had an A4LD , which i manually shifted constantly for 2 years. it worked fine when I took it out. So i guess what i am trying to say is , I would like to formally re-ask my question , and i humbly request that nobody try to post dumb crap here trying to act like I'm a fool . I know Automatic Transmissions , are called that for a reason , i also know that the option to manually shift it is also there for a reason. All i want , is someone to tell me if manually shifting a C4 every once in a while would be causing my problem.

for the record , my mustang was an auto before the swap and I didnt feel like converting it to a manual. that is why i don't have a manual if you must know.