blistovmhz
NAXJA Forum User
- Location
- Vancouver, BC
98 XJ, AX15, NP231 (SYE), D30HP front, Chrysler 8.25 (LSD) rear.
Pulled the rear diff cover for inspection. Everything looked clean and no chips/play. Threw the cover back on, poured in a few bottles of 75w90 gear oil with built in friction modifier (whatever the shop had listed for this diff with the LSD).
A few days later I was parked on a hill and let the Jeep roll back (with wheels turned slightly) and heard some noise coming out of the rear. Thought it sounded like the tire lugs grabbing onto the brake line or something. Inspected, couldn't find anything, crossed fingers and drove home. Problem seemed to go away, so I figured it was just break-in for the new oil.
Noise came back last night, again while slowly rolling backwards down a hill while turned slightly. Got home and parked with wheels turned, threw in neutral and laid under the truck and just pulled the Jeep backwards while I listened to the diff. Sound is definitely coming from the diff.
So... wtf? Is all 75w90 GL5 with friction modifier not made equal? Should I just add some regular fiction modifier or is it time to flush and start again with better oil?
Pulled the rear diff cover for inspection. Everything looked clean and no chips/play. Threw the cover back on, poured in a few bottles of 75w90 gear oil with built in friction modifier (whatever the shop had listed for this diff with the LSD).
A few days later I was parked on a hill and let the Jeep roll back (with wheels turned slightly) and heard some noise coming out of the rear. Thought it sounded like the tire lugs grabbing onto the brake line or something. Inspected, couldn't find anything, crossed fingers and drove home. Problem seemed to go away, so I figured it was just break-in for the new oil.
Noise came back last night, again while slowly rolling backwards down a hill while turned slightly. Got home and parked with wheels turned, threw in neutral and laid under the truck and just pulled the Jeep backwards while I listened to the diff. Sound is definitely coming from the diff.
So... wtf? Is all 75w90 GL5 with friction modifier not made equal? Should I just add some regular fiction modifier or is it time to flush and start again with better oil?