Is it necessary to drop the fuel tank when I remove the cover from my rear diff. I have a very high pitch whine over 40 mph and suspected my diff oil needed changed. I have changed the oil in the transfer case and removed and resealed the front diff. The oil was low in both and the whine has dropped consideralby. I wish to do the rear but I am not sure I can get to all the bolts without dropping the tank. Any advice? Thanks.
No, dropping the tank is not necessary. Just lift the car with a jack far enough to have access to the upper bolts. Use some stands to work safe.
If your diff has trac-loc or vari-loc, addition of limited slip additive would be necessary.
JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.