1990 V6 3.0 liter engine 170 k miles on engine that runs excellent.
Traveling down the highway at 50 mph I hear a short whine from the
engine compartment and the speedometer needle goes haywire fluctuating
wildly back and forth. The car decelerates and I pull off the road.
Engine operates fine but won't move when put into gear. The shade tree
mechanic I had pull me in believes the differential pin is the problem
(didn't have him open things up because I don't want him to do the
job). Does this make sense? The transmission was replaced at 130 k.
Any opinions as to the possible problem and guestimates as to how
costly to fix would be most welcome. The age of the vehicle makes
major mechanic repairs economically unfeasible.
Thank you in advance for any light you can shed on this problem.