Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[RoyLittle0]

Went for a little drive to Tesco's yesterday, i was in 4wd at the time, driving along no problem but when i pulled off from the trafic lights it felt as if the back brakes was locked on and there was what i can only describe as a rubbery grinding noise from the back end, once up to spead this went away.

If i coast in neutral it does not slow the car down so i sort of rule out the brakes and seems worse under load and cornering. but at speed it always goes (or just cant hear it) anyway pulled in to the car park and it ground to a halt would not go any further had to put it into reverse and then back into drive a few times just to get parked up.

Any idea what the problem might be and what the cure would be!!

[Mike Pavelin]

What model/year of jeep do you have?

[birty]

1993 4.0 XJ

[Mike Pavelin]

The shuddering sounds like the plates in the rear diff chattering. Drain the oil and repace with 75W90 GL5 gear oil and Mopar limited slip diff additive. The tightness problem sounds like you had it jammed in part time 4WD.

[tag]

4wd on dry tarmac road!

[jonathanhann]

Just drained the trac lock rear diff on my 94 cherokee and refilled it with 75w140 gl5 as used by bmw in their lsd diffs, fully synthetic.
No judders at all yet and before it was juddering like mad when hot.

still got pinion bearing whine but thats no worse than before.
The shit that come out was like metallic grease!
 

[RoyLittle0]

4wd on dry tarmac road!

Thats what i said, yes, as advised by the Dastards, to run her in 4wd on a weekly basis to keep the transfer box free, when i bought her she had not been in 4wd and i was unable to change between 2wd and 4wd without getting stuck in part time and we wouldn't want that would we!

[JamesH]

It must be 4WD FULL-TIME for use on tarmac  

[tim_aka_tim]

4wd on dry tarmac road!

The 4.0 has an np242 transfer case, which unlike the np231 in the 2.5 has a 4WD full time position.

[RoyLittle0]

I use full time 2wd 95% of the time and full time 4wd the rest of the time just to get the transfer box used to being moved as when i got her she would not go into full time 4wd just wanted to go into part time, so then i had to change from R to D to get it to change (bit of a pain), never had the need to use part time yet and obviously wouldn't use on the road.