'92 Sport issue with 4th gear overdrive.

[Good Sport]

Update:

Truck is back from trans shop and running great. Had the trans rebuilt, or in their terms, remanufactured. New torque converter etc. Seems the tc was the main issue, and other aged/worn components. Was able to reuse/keep the original trans shell.

As to the cost, it was $1990. For perspective, AAMCO wanted $3000+!. So, the Mrs. and I were fine with the $1990. In 10 days we will be celebrating 30 years of ownership of the truck.

Anyway, thanks for the advice/comments everyone.