has anyone else heard that if you change the ATF in a old c4 there is a good chance you could lose a gear or all of them. i just put a HURST slap stick shifter in the floor but now i want a shift kit in it. and i also heard about a T tech flush system. ya you hook it up to the radiator lines and flush the whole 15 or so quarts. will i have to get it rebuilt. or is there a trick i dont know about. any help?????
I have heard that many times in my life. I always thought that the trans was ready to give up anyways if the fluid was changed. and it let go soon after. I have seen it happen with all makes of trans while I managed a quick lube for 6 years I always looked closely and would sniff the trans fluid to see if it looked or smelled burnt. Changing fluid will not ruin your trans,, if that was the case my daily driver of 262k miles would have lost 5 tranny's instead of being on the original one.I change the fluid once a year/ every 50k miles. Dan .
What they mean is if you have never changed your fluid(like 90k on up) it is possible to lose forward or reverse. What happens is 1 it actually helps at that point to have all that crap floating around it acts like a type of friction modifier. Second by flushing the trans you can dislodge the junk build up in the filter and clog the valve body etc........... Dodges seem real suspect to this. If you maintain your transmission and don't abuse it it should last a long time.
i understand that Dan. im managing a jiffylube, which used to be a Q-lube, and we do T techs on 2-3 cars every day and alot of them are 200k miles and up and i haven't had a complant other than slipping caused by low fluid level. well what would you say the percentage of me loosing a gear would be. 50% 60%? or is it almost a sure thing. cuz this is a daily driver right now. or could i just get better shifts out of adjusting the modulator valve? thanks for your help.
Advice from the master My Uncle was one of the best transmission rebuilders in Memphis TN. at one time, I asked him about this about a month ago and here was his answer. Drive the car about 20 miles or enough to really warm the fluid up, then let it sit level for about an hour before you change the fluid. Start by draining the converter first and ALWAYS change the fluid with the car level, this way any bits and pieces that can lodge in passages will drain out the pan and not stay in the tail shaft section. Most people only change their fluid because they notice a problem and after they change it, the problem magnifies itself because of different fluid thickness. My tranny in my pick-up has over 120,000 on it and sat for 10 years with the fluid in it and after a change and 20,000 more miles it's still shifting fine.
