[résolu]Transmission C4

289/67 a écrit:Oui mais à part la démonter et la réviser que faire d'autre(s)

If your C4 is suffering from "morning Sickness" - that is if it hesitates to go into forward gears on the first start-up of the day but otherwise it runs fine; you have a poorly sealing forward clutch. This is usually caused by the seals on the forward clutch piston getting hard from too much heat and years of it. The only repair is to rebuild the tranny. Yes, I know there are myths about putting everything from diesel oil to brake fluid - and any number of stuff off the shelf - into the C4 but think about it. If this stuff will soften the hard brittle seal in a clutch pack what is it going to do to the converter seal that is already soft? It is the first seal that will be affected by whatever you put in your transmission and it has to hold oil in your transmission to keep it alive. If you are running a cooler that has any length of rubber hose to it the softening agents (usually alcohol) will also ruin those hoses too - and they are under about 70 psi at times. You are a lot better off when this problem first arrises to let the transmission take it's time to engage (don't rev up the engine) and once it engages drive it gently. I have seen cars last for two years with this problem. This will give you time to get a replacement or schedule the time for the rebuild.