.one lane

I'm pretty sure the diff is bad but to confirm, worn u-joints and bad wheel bearings won't make this type of whine?

Sounds like straight cut gears.

The whine will happen every time I let off the gas pedal and coast in gear or neutral.

wannafbody

iTrader: (1)

I'd guess bad rear end. Seems to loud to be the tranny.

.one lane

The sound comes directly behind me. Didn't have any issues before I swapped in the 1.8 diff.

rleete

iTrader: (21)

Sounds like you need to adjust the backlash, if it's only on decal.

.one lane

I'll probably tear the diff apart this weekend and see what the backlash is set at. The diff is from a '95 but I have '99 FSM, pretty sure the acceptable values for the diff should be the same, no?

Braineack

iTrader: (62)

sounds similar to mine when i killed it due to no oil...which then killed the trans from all the extra load...

.one lane

How long were you driving with the bad diff?

Braineack

iTrader: (62)

drove about 200 miles.