[Cherokee95Q]

I have a roaring noise coming from the rear end of my 95 cherokee ive replaced the differential bearings and races still makes the noise anyone no what it is please let me no ive put so much into it i dont want to get rid of it for a ford

[XJH-007]

IS the roaring all the time? Power on/off, in turns, certain speeds, certain driving conditions?

Have you pulled the rear shaft and done a test drive?

What axle do you have?

Does it do it in all T-case settings?? 4H-4H-4L

Need more info.

It could be a T-case bearing too..

[sparkeep]

Most common cause of rear end noise is gas being expelled through an exceptionally tight sphincter.

[Cherokee95Q]

its all the time i no its common but my votech teacher said its either a bearing but he wants me to replace the rear its a Chrysler 8.25 im just sick of the noise i dont want to replace a bearing and find out its something else what should i do get a new axle or get a bearing or something

P.S. the sound is coming from the differential so any ideas?

[Cherokee95Q]

oh and i did a test like i said its coming from where the diff
P.S. could it also be the spider gears they look warn as well

[93gc40]

Cheapest option is a new 97-01 8.25 axle from a Junker. You need gears, could be spiders but more likely Ring and Pinion, Bad wheel bearing can cause a howl in the diff.

[robsjeepxj]

Did you check the pinion and wheel bearings when you replaced the "differential bearings"? If not I would say it's probably one of them. It's a lot easier to just replace the bearings than to have find a good matching rear, pull it out, tear out your old one and then finally bolt the in the new one. Even then you have no guarantee it not bad either unless you pull it apart and check all the bearings in that one as well. Does your teacher just want you to replace the whole rear because he doesn't know how to set up gears or what? I had a votech teacher tell a friend of mine that he ruined his jeep once because he put a lift on it so just keep that in mind too.

[foggybottombob]

If you mean the carrier bearings when you say differential bearings, then I would suspect the pinion bearings next. The outer pinion bearing is the one that normally wears out first.

[Cherokee95Q]

im gonna with 93gc40 and replace the spider gears the pinion bearings dont seem bad if they were bad wouldnt you be able to move the drive shaft if the bearing was shot or bad

[Cherokee95Q]

also it used to be all the time now it gets louder when you accelerate would that be the pinion bearing or spider gears

[Cherokee95Q]

actually since i cant find spider gears for my truck im gonna check the pinion bearings and ill update you guys and see if that was the problem

[foggybottombob]

Note that when driving straight down a road the spider gears are not turning. The only way to get spider gears to turn fast is to have one wheel stationary and the other one turning such as a stuck in the mud scenario. I can't see spider gears making a roaring noise as you drive on the highway.

[Cherokee95Q]

idk what it could be but im gonna just replace the axle thats the major issue right now i also have to replace the rad the transcoolant line this truck is expensive im at almost 1200 spent on it on trying to fix the axle alone and if the axle is replaced and still makes that noise im gonna sell if for at least 1200 tops