[Mark90LE]

Hello,
I drive a 1990 Ramcharger, 360, automatic overdrive transmission, auto locking hubs. There is a fairly loud bearing noise coming from either the tranny or transfer case. Noise is louder with overdrive engaged, much quieter with overdrive disabled. Transmission shifts fine otherwise. It's been doing this for quite some time and hasn't gotten worse. Any ideas on what's causing the noise and what can be done, if anything, short of a rebuild?
–Thanks for your advice

 

[OhPinions]

Jeez, that's a tough one. Try shifting the TC into 4WH and 4WLO and see if the noise varies. Eyeball everything externally in the drivetrain.