If differential has locked up, then as KHL mentioned, you can repair the differential, but would have to remove trans.
If locked, you can repair differential, replace trans with a rebuild unit, or get a used trans from junk
A131L transmissions (used) can be purchased for $300-500. They were widley used in Toyota's.
You can generally get it installed for $500-800 depending on garage labor rates.
If you change the trans (rebuild or used) MAKE SURE to replace the rear main seal on engine, and input shaft seal on convertor.
Differential failure is caused by leaking fluid from the axle seals.
If seals show no indication of leaking, then original installer most likely failed to refill the differential when trans was installed, so I would certainly discuss this error on their part.
Saturday, October 24th, 2009 AT 9:03 AM