what does the toe in and out do for the rear wheels. iknow how it works in the front. better sterring at high speeds ext. what does the rear do.

you should read my setup guide.
http://www.rcuniverse.com/forum/m_5521163/tm.htm
You cnage rear toe using toe blocks, thats bearing carriers with different angles.

Cheers,
Dann

So to adjust the toe on the rear, do you have to remove the arm from the hinge pin?
I just got a GT2 and my left rear has more toe in than the right and my truck is tracking to the left. I can't get rid of it with adjusting the front.

Thats not true, it just looks like that cos the pipe's there.

You dont need to adjust it but you do it by either buying a rear arm mount that has more toe or a rear bearing carrier that has more (or less) toe. Also it might be torque steer or a bodgy diff thats doing it. or a bidgy bearing.

I will post some pics when I get home tonight, so you can see what I am talking about. There is an obvious difference between the right & left side of at least a couple of degrees. It's enough that even my neighbor, who has no experience in RC cars, can see it. But I will also check the RPM's of each wheel to make sure it is not the diff causing it. I need to clean it now since the engine is broke in, so I will check the bearings and such when I take it apart as well. Thanks for the info, it's greatly appreciated.

it really isnt, because the pipe is there it APPEARS to be way off i know. remove the pipe and engine and you will see it is (or really should be) fine.

Dann