school bus question

im working on a 84 model thomas built school bus and the problem that is occuring is that when it is put in gear the motor stalls and turns off. it is an automatic tansmission and im thinking it might be the locking torque converter? any input or advice on how to diag this problem further would be greatly appreciated...

thanks__thomas

Would be nice to know what engine and trans it has and does it stall in drive and reverse, and does this trans have a lock up convertor, lots of info is missing here!

Thomas was the coachbuilder that built the body and interior. The chassis, suspension, engine, trans etc were all built by a truck manufacturer. We would need to know what maker that is. Likely the grille, hood etc should have the maker's name.

it is a detroit diesel motor...possibly an allison transmission...ford made the chassis...i will find out more info tomorrow...im from north carolina but im in haiti doing some work at a school but they are having some problems with this bus and im trying to get it straightened out...thanks for all the help!!!!

yes it does stall in reverse and drive

If it is just not a normal stall condition that can be adjusted by setting the idle speed, than something is locked up in the trans.

it is running fine at idle it just boggs down and stalls when put into gear...i was thinking it could be the toqrue converter clutch is staying engauged but im not really sure...thanks for the help