92 corolla 4aFE 4 speed auto 170k...driving down the highway at 80...it felt like my car hydro-planed when i hit some water and slowed me to about 70...then i got a noise like something was rubbing on the tire. The noise accelerates and deccelerates with speed. However, if you shift into Neutral it stops. Car never made any noise at all before. I just changed the ATF with dexronIII and a lucas autotranny addative. 1qt lucas 2 reg. ATF? anyideas? Runs and drives fine other than the noise...
Check the ATF level, also check your owners manual see if yours has a separate differential. It might have blown, it take oil from the rear part of the tranny (if it is separate), otherwise I will say the axles.
Yea it has a seperate diff. what do you mean by blown, also how would it drive fine if it were bad? and in what way would the axles possibly fail, stripped splines? thanks for your help
I was reading your post again, my first guess would had been something being bent around the wheel and rubbing against a body part, the only problem s that putting in neutral should not fix that. I will just jack the wheel up and try to turn it with hand and see where the noise is from. Make sure the differential has oil though; the nut that you have to open to check it is behind the tranny and underneath the steering.
Well, thats what I meant by separate Diff. It takes ATF, but mine is separate from the Auto tranny. I think it is a weird setup though because most tranny shops don't know about it either. Check your owner's manual (if you have one) and see whats the procedure to check the differential oil. But as I said you might end up jacking the wheel and rotating it, because no matter how much oil you have in the diff, now you are hearing noises.
Yea i never seen a seperate differential like that before...i drained it but i didn't fill it....im very upset. How much damage do you think i could have possibly done with 35 miles of easy driving?
Difficult to tell, but mine has been running low for the last 8KM without much damage, but then my wife drives very slow (35-45 max), so I am not sure if that is a reliable model. I also have been filling it with high viscosity gear oil so that the leak is slow. Should mention that the leak started after mech changed the axle and thore the seal and didn't take responsibility for fixing it and I had to move the same week so didn't bother fighting that.
Also worse case senario: AAMCO quoted $200-350 to fix the whole diff with new gears and etc., I hope yours is fine though, just fill it with ATF and see what happens.
If coasting down the road in neutral makes the noise to go away, then I think your diff should be fine. By the way coasting down the road in neutral is illegal! I would still jack the wheel and turn and see if you could find the source, if you haven't done that before; bad bearing? I am not sure if I can be of more help.
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