| Author | Topic |
|---|
Location:
Perth
Registered:
July 2003
|
|
Re: Sticker Shock - MA61 Centre Support Bearing
|
Mon, 14 July 2003 06:44
|
 |
Thanks Gold28.
I have had this 'noise' since I got the car (nearly two years ago).
Symptoms:
- is a rumble/whine at 65-70kms, no vibration is evident
- is independent of road condition (wet/dry), accelerating/braking, cornering, temperature
- seems like it is coming from the rear of the car
I actually replaced the 3.7 diff in it ('cause I was convinced it was the diff) with a 3.9 - but the noise is still the same.
I pulled the prop shaft last weekend & you can see the paintmarks on the shaft from when they balanced it (was balanced about 5 years ago) - so I am reasonably sure it is balanced. I also checked the centre bearing and it felt fine (no binding, no slop). Interestingly, the centre bearing has been installed back-to-front when compared to what the TSRM says.
The gearbox definitely has some input shaft noise, but I when I ran just the gearbox & the front half of the propeller shaft (with the centre bearing) I didn't get the rumble/whine - just vibration (as expected), so I don't think it is the gearbox.
I spent most of Saturday with it up on stands trying to figure it out - no real conclusion. At least I know the uni joints & centre bearing are ok now.
I can only guess:
a) it really was my old diff, & the replacement one has the same problem
b) it is a rear wheel bearing - although there is no slop/play/noise I can detect by hand
c) it is one of the CV joints on the end of the rear half-shafts (how do I check for that?)
d) it is a front wheel bearing disguising itself as a rear-end noise
e) tyre noise
I think I'll have to invest in a louder stereo system!
Thanks
Peter
BTW - Justin I have a 3.9 diff at the moment. If I ever get around to a 1UZ or 1JZ swap I figure I'll put a trutrak centre in my old 3.7 and it should be ideal.
|
|
|
