jnack
Well-Known Member
- Thread starter
- #1
- had a long drive, noticed some driveline vibrations highway 60+ MPH 1.5-2k RPM (mostly around 1.5-1.6k -- this is a diesel 8th gear)
- shortly after arriving home got a service 4wd light on dash ( i thought this was due a failed repair of the FAD connector harness that broke on trail last yr)
- double checked FAD connect which seems intact
- when I jack up the vehicle can engage 4wd & lockers
- with vehicle jacked up when you push front tires forward it spins the front drive shaft.
My conclusion is FAD failure, likely actuator -- maybe coupler. I don't hear any grinding noise coming from the front axle so less likely think it's shattered.
I've got a big overland trip planned to leave in 2 days so no chance this will be fixed by then...plan is to just drive real slow on the highway to avoid the drivetrain vibrations. Hopefully it holds up....
Has this happened to anyone? Do you think the diagnosis makes sense?
- shortly after arriving home got a service 4wd light on dash ( i thought this was due a failed repair of the FAD connector harness that broke on trail last yr)
- double checked FAD connect which seems intact
- when I jack up the vehicle can engage 4wd & lockers
- with vehicle jacked up when you push front tires forward it spins the front drive shaft.
My conclusion is FAD failure, likely actuator -- maybe coupler. I don't hear any grinding noise coming from the front axle so less likely think it's shattered.
I've got a big overland trip planned to leave in 2 days so no chance this will be fixed by then...plan is to just drive real slow on the highway to avoid the drivetrain vibrations. Hopefully it holds up....
Has this happened to anyone? Do you think the diagnosis makes sense?
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