6G Celicas Forums

Replaced motor in my 94 celica gt with a 96 gt. (THANK YOU SOO MUCH 96gtok!!!) My transmission went out. Put in tranny out of 94 gt.
At first it would do nothing in reverse so we thought we were going to have to replace it again. The fuse for my windows blew about the same time, n when we replaced that, reverse magically started working. Coincidence?
I took off down the road, my speedometer went out in about half a mile. My RPMs freaked out because of this. My car seemed to die so I pulled off the road and tried to take it back home. It wouldnt work in reverse again, and now nothing happened in drive. Turned it off and screamed for a few seconds, then tried again. It worked fine. Made it to the top of the hill and it did the same thing.
I can drive about a mile before I have to turn it off and back on. The transmission is pulling fluid up through the filter, just not returning it. Evidence points to a possible wiring issue....
Any help or thoughts?

This post has been edited by homeboy: Sep 13, 2009 - 10:48 AM

you're low on transmission fluid, put some in before you burn that thing up.

classic symptoms you have, no reverse and loss of forward gears after a few upshifts until you shut down and the fluid runs back into the bottom of the pan. trans fluid is checked with the engine running after its hot and the gear select has been moved through each gear range. should be in the cross hatch area, takes dex2 or better.

nope
we just put new filter, lucus, and fluid in it.
its actually high after you shut it off

lucas? which lucas? that could be your problem there.

where does it read on the stick when its running? any flashing OD light going on? theres no way that the fluid isnt getting back into the pan unless its going out of the transmission somewhere, its a closed system.

ummm not sure.
a mechanic told us last night that there are two plug wires on the transmission and if either of those sensors are broke it could be doing this. so we're checking that out tonight.

well if you put in the lucas for manual trans, engine oi, and differentials then yea. you don't need a trans additive unless theres something wrong. i'm not real familiar with the GT automatic trans, just he 7A (ST) auto trans.

generally if the wires to the trans are messed up you'll get put into limp mode which is 3rd gear all the time unless you manually select and some other odd symptoms like it slips out of reverse after a few dozen feet.

well you are talking about the shift solenoids sensors, I have a write up here in case you want reference. but make sure you are checking the fluid level after its been running hot or warm, not when it is cold and parked. Thats how the transmission ATF is checked.

from what he described he was getting no upper gears and inconsistent reverse and when running the fluid was not in the pan? or it was but got higher when it was turned off? i'm not sure what the hell he's saying really.


he says the trans fluid is getting sucked up the trans and then just vanishes?

The fluid is getting sucked up, but not returning when its running. you turn the car off, it all drains back out into the pan. thats how the mechanic described it.

the fluid level wasnt low, meaning it would need fluid. we turned the car off and immediately checked the level, and it was saying it was high.




we turned the car off and immediately checked the level, and it was saying it was high.

you need to check the fluid level with the car running, a completely empty trans will take around 8 quarts of fluid or more. on a level surface, engine running, hot, foot on the brake, go through each gear position and wait for 2 seconds. park, reverse, nuetral, drive, two, low, then go back up again pausing for 2 seconds in each gear. then check the fluid level, if its not on the stick add fluid until it is on the stick in the middle of the cross hatch, take it for a short drive, park again, leave it running, recheck the fluid level and add until you're at the top of the cross hatch area.


your mechanic doesnt know how to check the fluid level on an automatic trans? good god, its printed right on the dipstick. i've yet to see any toyota automatic that you don't check while the engine is running, only some hondas do you check with the engine off.

I would imagine that if you had any elect problems, you would see that od light flash. I dont get the part where you say the fluid is not reading on the stick while running. I dont rebuild A/T's but it sounds like your pump is working fine, but somewhere its not returning while running? But when you turn off the car, all the fluid drains back down? I would check the valve body if that were the case.

yo homeboy, you ever figure this one out?

the guy that had replaced the tranny broke a sensor (i want to say it was called the module sensor..) and just attempted to splice it back together. you can't splice it, you have to buy a new one. replaced the new one and its almost perfect. it still dies in reverse sometimes but hopefully a good tune-up will fix that.

so with the car running you now have fluid on the dipstick? should have took about 8qt's to completely fill it when the car is running and will read high when the car is off. takes dexron type fluid, i like redline dexron atf myself.

i'd be interested to know which sensor, there arent that many on these toyota transmissions.