max ii tranny question

[slim8108]

ok guys i have a max ii when i pull on sticks forward or reverse can rev motor up but dont go anywhere both clutches are spining fast when i rev and belt not sliping could t20 be bad

[Mike]

Make sure the diamond shifters on the T20 are actually being moved when you are shifting from forward to reverse. Trace the shift linkage from the shifter back to the T20. As a general note, when in forward, you have to push forward on the sticks while applying throttle to move forward. When you pull back on the sticks, it should brake that side of the transmission. When in reverse, you pull back on the sticks while applying throttle to go backwards and push forward to brake that side of the transmission.

[slim8108]

Yes mike they do ok when i pull back it moves a little then i give it alot a gas and clutches just spin is the belt suppose to go up and down or just stay level and i cant push sticks foward i just give it gas then it goes sticks can only go back please help

[Mike]

I know you said your belt isn't slipping but it sounds like that's what is happening. Make sure the belt is the correct width and adjust the tension by sliding the motor back. When fully engaged, the belt will move up and down the clutches while you are moving forward/reverse if you are in gear. If you rev up the motor with the transmission in neutral, the belts should also move up and down the clutches.

[thebuggyman1]

You could have snapped an input shaft too. I did that once, but in all fairness I was abusing the machine at the time....just like a rental
Your first check should be the diamond shifters. Pull them and make sure the little pin is still on the bottom and not snapped off. Then put a screw driver in the hole and pry the collar either way to make sure the trans is actually in gear. If it still won't go the t-20 is probably bad.

[slim8108]

Ok mike i pulled the motor cover off when in reverse i pull back on stick it starts to move i give it more gas and look at belt its not going up or down just stays on top spining dosent go down even at full throttle

[Mike]

What about when you are in neutral and rev the machine up?

[slim8108]

Ok in neutral it does go up and down but in gear it dosent why would that be

[Mike]

It won't move up and down in the clutch until you get up to speed. Ignore the clutches now and go back and check the diamond shifters as thebuggyman1 mentioned

[slim8108]

Can u guys show me a pic of what it looks like sorry iam really new to this trying to learn slot

[Mike]

A couple of good references for you:

First look in the how-to section here: How to rebuild a T20 There are pictures and descriptions probably on page 2 or 3.

Second, search the transmission forum for "diamond shifter" and you will find a lot of threads on the topic with photos including threads that discuss the problems with the pin that can shear off and how to replace it.