Join Date: May 2009
Location: east coast
Car: OBW H6 VDC, Tribeca, XT6
Feedback Score: 1 reviews
FRONT or REAR differential?
1. Front: shop is likely responsible. It is *true* that the differential doesn't require any work during a trans rebuild - but it is part of the transmission as you said - and is unbolted from the transmission during a full disassembly. When reassembling the front diff - the ring and pinion backlash and bearing preload have to be set absolutely precisely or the front diff fails.
That needs repaired sooner rather than later, it can only gets worse and will fail.
Bearing would be the cheapest front diff repair ($100 in parts), new ring and pinion would be $800 in parts. Both very roughly $1,000 in labor.
If they won't warranty it then get a used transmission. That's how most people repair automatic transmissions anyway. Rebuilds are costly and the success rates aren't extraordinary by any stretch.
2. Rear differential is probably a mis-diagnosis of "torque bind". Subaru rear diff failure is nearly unheard of an frequently misdiagnosed. It ends up being torque bind. That means you need the Duty C solenoid or clutches in the clutch pack replaced. Shop isn't responsible for that.
If it's #2 make sure you're tires all match in size and tread depth, change your fluid (although that shouldn't matter since it has new fluid from the rebuild...).
Is the AT (transmission) light blinking 16 times at start up?
Is the check engine light on?
H6 OBW VDC, H6 OB Sedan, Tribeca, Lifted XT6