I am constantly scanning ebay for TRX-1 items that will "spice up" my buggy. (especially the elusive motor plate.....garrrrrr). Anyways, I have always been on the lookout for the Thorp tranny gear set which changes the internal gear ratio from 2.14 to 2.25 (same as stealth tranny).
Here it is!!! (just bought it) I was very surprised to see it!!
http://www.ebay.com/itm/250927187308...84.m1497.l2649