I'm having problems with my 700r4 not locking properly.Ive tried loads of things but still not cured.Can anybody tell me the exact route the fluid should take when in lock up or even better has anybody got a picture or diagram showing it.
Thanks
powermite

 

Well it doesn't go very far.... (he,he)
Seriously, what did you do before it quit working??
The oil path for the tcc release doesn't go very far. There are only a few things that would cause it not to work. Only one of them can be fixed without pulling the trans.
If you are positive the electrical works, and the solenoid coil isn't "open". The solenoid may have a crack , dirt in the orifice checkball capsule ,bad checkball or o-ring seal (it works by exhaust). A sticking tcc valve will do it also. It is just above the solenoid in the pump housing.

If not it could be the teflon seal on the input shaft, or the o-ring on the end of the input shaft. Or you may have burned up the lining inside the converter.

To apply the tcc clutch, the exhaust valve on the solenoid closes, the tcc valve moves up, oil pressure is the routed through the pump, to the input shaft, out the very end of the input shaft into the converter.

Hope this helps.

 

What year tranny? Let me know and I will scan and email you the hydraulic schematic.

 

 

Ummm... he beat me to it.

 

Sorry, man.. already had it on the computer.