2002 Cadillac Escalade - Drivetrain Issues FIXED

[sknap83]

This cherry escalade has 209,000 miles on it. The new Or reman parts include Front Differential (reman) T-case (Reman) new cv axles new front wheel bearings rebalanced drive shafts. She came back to me a 4th time today with a complaint of a drivetrain noise. It ran out great when it left 2000 miles ago. The first time it came back the reman on the t-case was faulty. They only did a repair and left old bearings in GRRR But charged us for the reman. Then didnt want to warranty it because driveshafts werent balanced at time of t-case replacement. So we had the shafts checked and got it covered. 3rd time the front diff was on its way out. At that time we did the diff new axles and both wheel bearings. Customer didnt want it to come back a 4th so didnt want to spare any expense. Well its back. The drivers side wheel bearing was on its way out again. I replaced that but the noise is still there. It is making a hum similar to a tire noise that gets worse when I turn the wheel. The front diff is leaking oil around the driversside output shaft and believe it or not. The differential managed to make oil. It was filled to capacity and had an oil change 2 weeks ago by us. The differentials were checked and it was were it was susposed to be. Yet 2 weeks later I drained 3/4 of a quart of oil out of the fill plug. It has me baffled. Could the differential be going out again. Did I yet manage to get another crappy rebuild. Would a differential sound like a tire? Or am I just Missing something. The tire pressures are all were there suposed to be and even. Hopefully some one can give me some insight on were to go from here. Thank you for any input

[wbuxton]

What speed does the noise come in at? How does it sond when slowing down? I have found that the old whip it right and left does not produce valid results like it used to....

[a&mauto]

We use a "Chassis Ear" with 6 different microphones to pin-point noises like this.
http://www.sjdiscounttools.com/ste6600.html

[sknap83]

We got it. Driver side wheel bearing replaced provided better but stilll not good results. The seal was blown out on the new wheel bearing. Still had the noise. Futhur investigation found that the reman differential had excessive play in the out put shafts. you could lift them up and down about 1/2 inch. New differential again but still a noise. The passengers side wheel bearing blew the seal and was running dry. Bearing felt fine but with out pulling it, you would have never known. We have in the mean time ordered the tool listed above. Nothing like replacing stuff over again. What a week. Then leaving the parking lot it backed into another car. LOL But it goes down the road with no noises