Hey guys. The other day my stock rear differential with 2.73s blew up, so I bought a low mile 8.8 with 3.73s. The axle was installed a few hours ago. I was one of two guys doing the job. We inspected the diff, and it was in great shape, the gears are FMS brand, and had no visible wear (knicks, grooves, etc.). We put in new Motorcraft 80W-90 gear oil and friction modifier when we sealed the diff back up.
On the ride home, however, I began hearing a dragging sound coming from the rear of the car. We had to swap over my rear brake setup from the old axle because the new brakes were thrashed ( my old axle had brand new semi metallic shoes and new drums, so I didn't want to waste them), so I assumed it was just the shoes dragging before they had adjusted. Also, I get a very soft howling sound from my rear only when I turn. It sounds like a rusty swing being swung, but it's repeated at the same pace as my speed and is softer in tone. It only happens when I take hard corners, and goes away when I straighten out. If anyone knows where these sounds are coming from, please let me know. Thanks a ton!
PS- we also installed a FRPP aluminum drive shaft.
On the ride home, however, I began hearing a dragging sound coming from the rear of the car. We had to swap over my rear brake setup from the old axle because the new brakes were thrashed ( my old axle had brand new semi metallic shoes and new drums, so I didn't want to waste them), so I assumed it was just the shoes dragging before they had adjusted. Also, I get a very soft howling sound from my rear only when I turn. It sounds like a rusty swing being swung, but it's repeated at the same pace as my speed and is softer in tone. It only happens when I take hard corners, and goes away when I straighten out. If anyone knows where these sounds are coming from, please let me know. Thanks a ton!
PS- we also installed a FRPP aluminum drive shaft.