1990 transaxle install to replacement jdm 4AFE engine - Toyota Nation Forum : Toyota Car and Truck Forums


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Old 05-27-2006, 07:24 PM   #1 (permalink)
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USA 1990 transaxle install to replacement jdm 4AFE engine

Okay, I have now had the engine and transaxle each out seperately. Right now the transaxle is out, while the engine is completely installed. The reason I am changing the motor is because the #3 connecting rod broke. Anyway, the transaxle was working just fine before I installed the motor. When the motor was ready to be started, it started right up and runs ok, but it seemed like the transaxle was making some kind of slight rubbing (maybe metal to metal) noise, and the car would not shift into any gear. I checked the trans fluid and it looked extremely high, even though it was perfectly fine before the engine was installed. So we removed the transaxle last night and checked the ears on the trans pump. They have some marks on them that might indicate something was rubbing against them, they are slightly worn, but they are not broken. I'm thinking the torque converter came off the ears when we tightened the converter-to-flexplate bolts. The motor I got had been used with a manual trans before, and mine is an automatic. When I installed my flex plate, I may have put it on backwards by mistake. Does anyone know how to tell which side of the plate should meet the converter? The plate is kinda curved or convex or whatever, so it would have to be installed in a particular way...Is there anything else that would cause these symptoms? How can I be sure that the torque converter is completely on? Finally, what else do I need to be careful of? I dropped the trans with the axles still connected, but the fluid has been drained from the pan. What is the procedure for refilling the trans properly? Thank You in advance for any help!


P.S. The engine misses quite a bit-anyone have ideas? I have changed the plugs, and checked the plug wires for proper continuity. I just purchased and will try new fuel injector seals, and a new oxygen sensor.

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Old 05-28-2006, 12:07 AM   #2 (permalink)
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The what trans axle...what the..? please clear this up! the fluid in the auto is to be checked at idel in the n postion...
ALso if going from manual to auto..check flywheels are compoatable and and the rest should only bolt up one way!
i think from memery the t/convert should be bolted to the flyweel add on plate?
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Old 05-31-2006, 10:33 PM   #3 (permalink)
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AE92

Transaxle=front wheel drive transmission. Yes, I'm very aware that the fluid needs to be checked with the car running at idle. The flywheel (manual trans) was removed, and my existing flexplate (automatic) was installed. Yes, it's compatible-it's off the same model of engine. You should NEVER bolt a torque converter to a flywheel, manual transmissions don't need a torque converter.

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Old 05-31-2006, 10:40 PM   #4 (permalink)
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well im sorry! just trying to help....
did you make sure you wired up the tranny ecu? this might help?
Any way if i can think of somthing more usful i'll let ya know
good luck.
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Old 05-31-2006, 10:40 PM   #5 (permalink)
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Well, getting no help here... Maybe I can help someone... Took the front pump out of the transmission today and found that the gear and the ears looked ok. Put it back together, changing the converter (shaft) seal and came to the conclusion that either the converter is broken (unlikely) or that somehow the flexplate got bent during the first attempt at installation, when the engine and trans weren't mating properly. I'm guessing that when we tightened the converter-to-flexplate bolts to the bent flexplate, it pulled the converter off of the trans pump ears and voila!, no workie. Will update later.
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