I have a 1996 Geo Tracker 2 door with a 3 speed automatic transmission.
When it’s cold it hangs in first gear.
When it’s warm it shifts smoothly, but at normal operating temperature as it approaches around 3,000 RPM it will pop out of gear.
If I let off the gas it will re-engage again.
Any ideas as to what may be the problem.
Would a fluid change help this???
Well as for hanging in first, My Dads 97 does that and we had a 92 that done that, My 96 is fine it shifts great! But here is what he does he will go to Advance auto parts and buy a can of transmaitc and pours so much in the trans and it will shift right away for a while but as time goes on it takes longer and long until he gets some more to pour in it, From what I've found out a lot of the tracker 3 speeds are bad for this it has something to do with the shifter.
Thanks a lot. I going to do a service on it tommorow. I drained some fluid out and put in Lucus Oils tranny fix. It really helped. The fluid is brown so I'm going to change it and the filter and see what happens. P/S I'm looking for a tranny.
Thanks for your reply
I really stay away from power flushing as it is brutal on your old seals. Pulled the pan the fluid was brown, and there was a fair bit of metal on the magnet.
Clean everything out new filter and gasket, and put it back together.
Put a quart of Lucus in it and new fluid. Still not shifting when it's cold, but it really helped the slipping and shifting problem when it warms up.
I'm going to drive for a week or so and do it again until I find a new tranny.
See what happens
2 types of power flush,
external and internal.
external, as in external pump pushes oil out of engine.
internal ( or natural) we let the transmission pump out all the oil as it suck in new.
you could have a bad pump or worse
failed vacuum modulor can cause ( and is external) quoting FSM page 7B17
harsh un/dn shifts
slips in L, D, R
engine burning tranny fluid.
the Modulator can be checked for leak down, and for ops by applying a vacuum tool.
test diaghragm for leaks and for servo shaft full stroke with vac, applied.
there are also 3 oil pressure line tests you can do .
in low, brakes on, L gear, full throttle 5 sec max, mod vac disonnected, line pressure
161-177 psi , page 7b-4 FSM
at the very least check for oil dripping form vacuum line on mod valve when tube is dropped downward, (save $500-1000 if Mod valve is bad) 5 min check.
I have been experiencing this cold transmission upshift delay in my 1995 Tracker. Took it to the dealer, who changed the tv cable. That did nothing. Next dealer is trying to flush the tranny to free up a sticking valve. We'll see. My question is- Does the '95 Tracker 3-spd auto tranny have a vacuum modulator, or solenoid valves, or what exactly?
tv must be tested on both ends, does TB move cable proper, and
does the TV rod in tranny track TB movement.
it can stick all the way out signaling WOT full time to tranny. bad.
the vacuum mod. is here Slush pump diagnosis
including FSM quotes on tests.
this mod valve can stick or the diaphram leak. and you will see oil leak from vac tube.
you can have a bad Governer. on 4wd takes removing xfr case to access on car.
modulator has its own screens than can clog.
this device shifts by speed.
mod valve by motor load.
TV by throttle demand.
one can effect or kill the other. i have the color hydra maps in fsm , it is clear what can happen.
key is , does your tranny have a control issue. or real transmission fail or just loss of pressure , there is a pressure test and a stall test in the fsm
the fsm IN CAR test section is huge.
does tranny hold power in all gears ,
2nd floor it , no flare?
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