Go Back   Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Axle Tech
GL4x4 Live! GL4x4 Casino







Search
Reply
 
Thread Tools
Old March 13th, 2006, 01:13 PM   #1
Toivo
Feel lucky?
 
Toivo's Avatar
 
Join Date: 02-24-06
Location: Denver
Posts: 5,142
iTrader: (13)
Mentioned: 0 Post(s)
Question Dana 30 questions

any info on why I am gettin grinding noise when in 4wd. Itll work at low engine rpm, but ne rpm over about 1500 and it pops and grinds. Axle joints and u-joints are OK too. I havent ruled out a stretched t-case chain (NP 231) but I think its highly unlikely, seeing as how Ive put over 1000 miles on it since the problem happend. More concentrated on vacuum axle disconnect. Any ideas?
Toivo is offline   Reply With Quote
Old March 13th, 2006, 02:09 PM   #2
ned
large member
 
ned's Avatar
 
Join Date: 11-05-05
Location: over,there
Posts: 673
iTrader: (0)
Mentioned: 0 Post(s)
Default

did you open your diff up and look
maybe worn gears??
or broken teeth
ned is offline   Reply With Quote
Old March 13th, 2006, 02:18 PM   #3
Toivo
Feel lucky?
 
Toivo's Avatar
 
Join Date: 02-24-06
Location: Denver
Posts: 5,142
iTrader: (13)
Mentioned: 0 Post(s)
Default idk

not yet...but doesnt the one side of the axle shaft spin all the time. regardless of wheter the 4wd is engaged or not?...i thought so..I could be wrong but I kinda figured that if that was the case..then wouldnt just driving it daily make tons of noise and cause serious other problems?
Toivo is offline   Reply With Quote
Old March 13th, 2006, 03:01 PM   #4
Haggar
Covered in mud...
 
Haggar's Avatar
 
Join Date: 11-06-05
Location: Oxford, MI
Posts: 17,551
iTrader: (54)
Mentioned: 1 Post(s)
Default

Thats your best bet..

First, pull the cover off the vacuum disconnect and inspect it. If it looks ok there, then maybe drain the t-case into something like a gallon size glass jar. Look at the fluid... any metal?

Gotta figure if there's grinding and popping, there's wear.


You can't tell the general location of the sound? Axle or T-case area are a few feet apart..

If the t-case fluid is clean (probably needed to be flushed/refilled anyway, right ;) ), then pull the diff cover.

Also, check the driveshaft CV centering yoke. That makes some nasty noises when it goes, also quite common on any jeep..


Do those things, and report back!
Haggar is offline   Reply With Quote
Old March 13th, 2006, 04:00 PM   #5
Toivo
Feel lucky?
 
Toivo's Avatar
 
Join Date: 02-24-06
Location: Denver
Posts: 5,142
iTrader: (13)
Mentioned: 0 Post(s)
Default ok

it sounds like the axle to me..as well as a few of my friends think so too..im gonna check the vacuum disconnect here soon. as for the t case drainin..i changed the fluid prolly 1500 miles ago...i will check everything twice again tho..I do not have any lifts my disposal, all I have is a parking lot..and its damn cold n crappy out
Toivo is offline   Reply With Quote
Old March 14th, 2006, 04:25 PM   #6
silverxj
team 14b
 
silverxj's Avatar
 
Join Date: 11-05-05
Location: Davisburg
Posts: 5,619
iTrader: (64)
Mentioned: 2 Post(s)
Default

It's not unlikely to stretch the chain on a standard np231. It's actually more common than you think, especially if you're in 4wd often.

Just changing the t/case fluid will have no adverse affect on a stretched chain. It's not like it's a rubber band and going to collapse back to it's original shape ... I wish mine had.

If you find that it ends up being the chain, replace it with a wide chain kit...
silverxj is offline   Reply With Quote
Old March 14th, 2006, 10:15 PM   #7
Toivo
Feel lucky?
 
Toivo's Avatar
 
Join Date: 02-24-06
Location: Denver
Posts: 5,142
iTrader: (13)
Mentioned: 0 Post(s)
Default no?

eh ok sounds good.....btw doing 4wd drifts for a long time one icy day COULDNT have had anything to do with that
Toivo is offline   Reply With Quote
Reply
Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Axle Tech
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT -5. The time now is 10:54 AM.


Powered by: vBulletin, Copyright 2000 - 2012, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Copyright 2005 - 2012 Cracker Enterprises - Powered by Linux
vB Ad Management by =RedTyger=
Page generated in 0.09572 seconds with 24 queries