|
|
17-11-2018
|
I just registered
|
|
Join Date: Nov 2012
Location: Sydney
Posts: 151 What Jeep do I drive?: XJ
Likes: 20
Liked 13 Times in 9 Posts
|
|
Trying to work out bearing noise
I've been flat-out with work and have not really given the XJ the attention it needs. I thought I had a damaged transfer case so had it overhauled (found bits of metal when I dropped the TC oil).
The bearing noise is still there.
Did a 200km freeway drive yeserday, spent some time trying to work out what the noise is. There are actually 3 noises; the constant grumble/whirring from about 30km/h up in 2WD. Put it in f/time 4WD and mostly under load it seems there is an additional whirring noise, kind-of comes in and out at regular intervals, seems related to road speed.
Then there is a lighter noise that appears when backing off at around 100km/h. It goes away with application of throttle, or with the brakes applied.
The front diff pinion seal is also developing quite a leak. It has been weeping off and on for months, but I degreased it just before the trip. THe leak is a bit worse, because I noticed a drip of oil formed on the base of the diff this morning.
I couldn't see any abnormal wear with the diff cover off, not that I really know how to tell. Spider gears don't seem to have lost their case hardening.
Some of the spider gears seemed to be worn on the edges and had scuff marks on them.
The pinion gear at the back had shiny marks on the front facing, as if it was rubbing up against something in the diff (crown wheel?).
One of the pics shows the oil pan I'd dropped the old oil into. There were small metal bits in the oil as pictured, and in the sun a kind-of metallic sheen to it.
Took it for a drive just now and I think the noise is slightly quieter, but I could be imagining it.
I know nothing about diffs but if anyone can help I'd appreciate it. I don't want to keep going with parts replacement therapy, it's getting too expensive!
BTW, I also took out the front prop shaft earlier in the week, that wasn't it, basic rumble noise just the same.
__________________
10/13 MY14 Grand Cherokee Overland 3.0 CRD
|
17-11-2018
|
Full Flexer
|
|
Join Date: Mar 2016
Posts: 1,133 What Jeep do I drive?: XJ
Likes: 109
Liked 640 Times in 436 Posts
|
|
its fairly likely the diff has worn bearings and needs overhauling.
with the cover off, it is possible to mount a dial gauge, and measure the amount the gears move compared to spec
a dial gauge can be bought cheap on ebay, very handy tool
opinions vary on how urgent it is to O/H a noisy diff, but one thing I do know is they never get better, only worse.
__________________
'96 4.0 Sport 370k+
'96 Limited 263k (unreg spare)
'96 Sport 335k (got smashed, farmtruck)
|
17-11-2018
|
|
Rock Munki
|
|
Join Date: Mar 2008
Location: Kellyville NSW
Posts: 2,381 What Jeep do I drive?: XJ
Likes: 178
Liked 351 Times in 223 Posts
|
|
In the wheels and tyres section of the fsm there is a whole section on diagnosing different noises, under different conditions. could be worth a read
__________________
Obd1 scanner.
'95 sport,4.6 stroker, 4.5" lift, 32"s, 4:10's, 8.25&SYE, taurus fan
|
18-11-2018
|
|
Full Flexer
|
|
Join Date: Jun 2017
Location: Central Vic
Posts: 800 What Jeep do I drive?: WG
Likes: 23
Liked 283 Times in 208 Posts
|
|
If I was diagnosing this based on your info i would reckon one or both pinion bearings has gone bad.
|
18-11-2018
|
|
CrawlerStar
|
|
Join Date: May 2017
Location: Victoria
Posts: 454 What Jeep do I drive?: XJ
Likes: 259
Liked 86 Times in 64 Posts
|
|
Agreed, sounds like when my back diff went. I suggest replacing with a good front diff from a wrecker. I got one from jeeepart recyclers and they warrantied the one that I got as it made metal, and sent me a second one. Great guys. $500 for a d35, im sure a d30 would be similar
|
18-11-2018
|
I just registered
|
|
Join Date: Nov 2012
Location: Sydney
Posts: 151 What Jeep do I drive?: XJ
Likes: 20
Liked 13 Times in 9 Posts
|
|
Quote:
Originally Posted by HamishW96
Agreed, sounds like when my back diff went. I suggest replacing with a good front diff from a wrecker. I got one from jeeepart recyclers and they warrantied the one that I got as it made metal, and sent me a second one. Great guys. $500 for a d35, im sure a d30 would be similar
|
I've been quoted $750 to rebuild the D30, drive in, drive out. The D35 I had rebuilt in my last XJ was much more expensive, about $1500 incl a new driveshaft. So $500 for a used D35 is not bad at all.
I will either try to replace the pinion bearings myself or get a used D30 if it's more like $300. Or sell the car. I'm not loving this XJ like I did my last one for some reason.
__________________
10/13 MY14 Grand Cherokee Overland 3.0 CRD
|
19-11-2018
|
|
CrawlerStar
|
|
Join Date: May 2017
Location: Victoria
Posts: 454 What Jeep do I drive?: XJ
Likes: 259
Liked 86 Times in 64 Posts
|
|
Quote:
Originally Posted by XJClassic
I've been quoted $750 to rebuild the D30, drive in, drive out. The D35 I had rebuilt in my last XJ was much more expensive, about $1500 incl a new driveshaft. So $500 for a used D35 is not bad at all.
I will either try to replace the pinion bearings myself or get a used D30 if it's more like $300. Or sell the car. I'm not loving this XJ like I did my last one for some reason.
|
That's cheap, $750 for the rebuild is economical in my eyes... Call around and see what people have to offer with warranty. Will be interesting to see what there is around.
If the cars a good one maybe tough it out and let it grow? My XJ was a real grower tbh. Never a nice car but so much character...
|
Thread Tools |
Search this Thread |
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is On
|
|
|
All times are GMT +10. The time now is 03:45 AM.
|
|
|
|
Advertisements
|
|
|
AJOR does not vouch for or warrant the accuracy, completeness
or usefulness of any message, and are not responsible for the contents of any
message. The messages express the views of the author of the message, not necessarily
the views of AJOR or any entity associated with AJOR, nor should any advice
be substituted as technical advice replacing that of a mechanic. You agree,
through your use of this service, that you will not use AJOR to post any material
which is knowingly false and/or defamatory, inaccurate, abusive, vulgar, hateful,
harassing, obscene, profane, sexually oriented, threatening, invasive of a person's
privacy, religious, political or otherwise violative of any law. You agree not to post any copyrighted
material unless the copyright is owned by you or by AJOR. The owner, administrators
and moderators of AJOR reserve the right to delete any message or members for
any or no reason whatsoever. You remain solely responsible for the content of
your messages, and you agree to indemnify and hold harmless AJOR, the administrators,
moderators, and their agents with respect to any claim based upon transmission
of your message(s). The use of profile signatures to intentionally mislead or misdirect any member on this forum is not acceptable and may result in your account being suspended. Any trip that is organised through the AJOR forum is participated
at your own risk. If you or your vehicle is damaged it is your responsibility,
not that of the person that posted the thread, message or topic initiating the
trip, nor the organisers of AJOR or moderators of any specific forum. This forum
and associated website is the property of AJOR. No user data is harvested and no information supplied in your registration will be sold for profit.
|