Felt a shudder in 1st gear towing the TT the other day. Looked down, and guess what. It's time to service the trany. Flush, and new fluid in the morning
You don't already do the routine maintanance on it which includes tranny fluid service? I do mine every 30k miles. Sorry to say, but those that don't deserve what they get. Trannys are worked hard & just can't be ignored.