The transmission went bad. Bought a used one and had it put in. It worked for a few days and then started hard shifting. The dealer said to add an additive. That seemed to do the trick about the shifting. About a month or so later, it wouldn't pull itself up the hill. Finally got it to go home. The dealer put in another used one. Started home with it and within a few miles it started to rev up like a clutch was being pushed in. Stopped and checked the oil and it didn't show any on the stick. Took it back to the dealer (who had already closed for the day) to leave it to be checked out. After I shut off the truck, I decided to check the fluid again and when I pulled out the dipstick he fluid gushed out of the fill pipe, and got on the exhuast pipe and caught on fire. We quickly got it put out. The dealer put in another tranny and the oil gushed out again on that one. The dealer then got that fixed.
What caused the fluid to gush out the fill tube?