I feel your pain...
I do not do Dealerships for any repairs after warranty for the very reasons of what happened to you.
When I got my 94 it had 64,000 miles on it and was 12 years old. It is a beautiful truck.
The original owner kept it garaged and was only used to take their 5'er to Cancun a few times.
They had the tranny puke 2 times... Seals... The 2nd time was found to be caused by the Dealership's improper repair.
Dealerships were the only folks that touched this truck...Even out of warranty... The dealership improperly re-assembled the rear brakes so they did not work properly. The E-brake was improperly repaired, the rear axle seals were improperly installed.. The list goes on. Thousands of $ those poor folks poured into the DEALERSHIP's improper repairs.... From one dealer to the other as they traveled...
They kept every receipt on this truck so I could review what went on...
I personally fixed everything and felt really sad for the original owners.. They were in their 70's back then and finally gave up on the whole thing because the repairs were costing them too much money... The dealerships they went to for repairs sucked them dry.
Jim