88 a4ld slipping

[wytale]

I have an 88 ranger with the a4ld. Just recently it has been giving me problems. Wether cold or warm when i go to take off in either d or r i have to rev the engine before the tranny will kick in and go. It is also slipping inbetween gears and i have no overdrive. Anyone have a clue on what to check or do i just replace it. Any help is greatly appreciated. Thanks

 

[BrooklynBay]

Welcome to this forum! There are several possibilities which could be the cause of the slippage. How many miles do you have? A sticking governor could cause a 1-2 shift delay. A bad or leaking modulator could also create problems shifting. Your bands, and kickdown cable might need to be adjusted as well. Your hydraulic pressure could be low as a result of leaking valve body gaskets, loose valve body bolts, a clogged cooler, filter, or valve body, or a bad boost valve. Connect a 0-300 PSI gauge onto the port which is located on the driver's side of the transmission. Check my signature for links to threads on adjusting bands, using a transmission pressure gauge, and for a thread called the A4LD valve body rebuild journal. The transmissions and transfer case section has a sticky thread written by Glacier991 on rebuilding an A4LD valve body.