Hi Guest!
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
T
TRDejaVu
Guest
Guest
Offline
The problem; the car has a driveline whine and strangely I can't decide if it is the gearbox or diff. I think that the sound is also being transmitted along the prop-shaft tunnel.
Symptoms:
Generally all is good and quiet until I slip the car into 4th then the whine develops as I go onto the gas. When I lift off all goes nice and silent again. If I take the car above about 50 the whine seems to disappear; I realize that I might just be leaving it behind along with the exhaust note. HOWEVER, at the lower speeds in 4th, if I change down to 3rd I think that I can still hear it, but not as pronounced.
When I first got the car I drove it about 30 miles up to Lippincott's for the structural work. I don't remember this whine being present. Since then I have:
- had Terry replace the diff pinion seal
- replaced the diff oil with Valvoline 80W-90 gear oil and Trans-X Posi Trac limited slip diff gear oil additive (recommended by Terry)
- replaced the gearbox oil with Gm synchromesh Trans Fluid (again recommended by Terry)
Predominantly only in 4th would suggest a gearbox issue, but then again maybe it is diff RPM related as the pinion nut was disturbed.
Any thoughts.
Thanks.
Symptoms:
Generally all is good and quiet until I slip the car into 4th then the whine develops as I go onto the gas. When I lift off all goes nice and silent again. If I take the car above about 50 the whine seems to disappear; I realize that I might just be leaving it behind along with the exhaust note. HOWEVER, at the lower speeds in 4th, if I change down to 3rd I think that I can still hear it, but not as pronounced.
When I first got the car I drove it about 30 miles up to Lippincott's for the structural work. I don't remember this whine being present. Since then I have:
- had Terry replace the diff pinion seal
- replaced the diff oil with Valvoline 80W-90 gear oil and Trans-X Posi Trac limited slip diff gear oil additive (recommended by Terry)
- replaced the gearbox oil with Gm synchromesh Trans Fluid (again recommended by Terry)
Predominantly only in 4th would suggest a gearbox issue, but then again maybe it is diff RPM related as the pinion nut was disturbed.
Any thoughts.
Thanks.
