The t-20 trans only has the three gears: forward-neutral-reverse. There is no high/low in either direction. I'm no t-20 expert like many guys on the site, but i recently rebuilt one and based on that I would suggest there is an issue with a shift collar inside the trans or the pin on the shift plunger. The first thing I would do is pull the shift plungers and see what the pins look like. The t-20 article on this site should point you in the right direction to do this.
I'm sure someone will chime in knowing exactly what's wrong.
Mike
Last edited by ES-hustler; 02-24-2009 at 12:17 AM.
old school hustler
02 superhawk