Quote:
Originally Posted by Bill Harris
It sounds like the trans brake is being partially applied when it shouldn't be. Most C4's implement a transbrake by applying the forward clutch, direct clutch and reverse band at the same time. Normal first is the forward clutch and maybe the reverse band (if there is engine braking in first), so if it is dragging in first it points to the direct clutch being applied. That would cause it to drag in second too since the direct drum is stopped by the intermediate band in second, and if the direct clutch is trying to apply at the same time, it will lock up the trans (likely one will slip, but it could lock up solid). There would be no problem with third, since the direct clutch is supposed to be applied in third. My guess would be that there is some pressure being sent to the direct clutch all the time.
A couple of things to check:
1. A lot of aftermarket C4 shifter arms are not keyed to the shaft and can slip. Check to make sure that when the shifter is in a particular gear that the transmission manual valve detent is properly aligned for that gear.
2. Has the valve body been out of the trans and apart since it was run the last time? You might have some leakage between passages so that the direct clutch is being applied when it shouldn't be. These things are very susceptable to passage leaks if the valve body bolts are not torqued properly, or if ANY of the bolt holes are stripped.
3. Check the trans-brake solenoid operation and adjustment. It will could allow the direct clutch and/or reverse band to apply at the wrong time if it is out of whack or the valve it is controlling is hung up. Is the trans-brake electrical switch OK?
C-4's are going to puke out of the vent even if the fluid level is OK. You should pull that little vent thingy and tap the hole with a pipe thread (1/4" I think) and put a hose fitting in it. Then run a hose to a puke tank to catch the fluid. Otherwise the bottom of your car is gonna look like the Exxon Valdez paid a visit.
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Bill,
Thanks for the reply. My car has all of the symptons you described. The only thing I did different was remove the delay box, installed a new transbrake switch (Harrington), and added a trans blanket. I did my burnout as stated and launched the car and everything seemed fine just real sluggish. It sounds like from what you are saying I can disconnect the switch and see if the transmission acts normal. On my transbrake switch I can barely touch it and you here the solenoid click even without fully depressing the switch. I think I will completely remove the switch from the car and try it. Thanks for the tips.
Smitty