4WD Detent Ball

[XxLT250RxX]

I found the detent ball that holds the 4WD selector in place stuck to the magnet on the transmission drain plug. Anyone know whats involved in putting it back in and why it keeps coming out? Tractor is a Mahindra 2565 Cab tractor built by TYM. It looks close to a T554 but with a little more HP.

 

[Harry in Ky]

How do you know that's what it is, and how many times has it gotten out before?

 

[XxLT250RxX]

When I bought the tractor, the previous owner said it had fallen out and he put it back in. I would like to know why it falls out and what's involve with fixing it right.