The T-5 is a little flimsy for trailer towing. Any overdrive-equipped transmission is a poor choice if you try to use the OD gear while pulling a trailer, but since the T-5's were intended to run behind V-6's and small-displacement V-8's in sporty vehicles, I don't thing they've got the torque capacity to handle a loaded trailer.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!