99 Dodge Dakota 4x4 3.9 (Transmission Tail Shaft Spacer
 

I just purchased a 99 Dodge Dakota and the Transfer case fell off. I purchased another one however I can't get the spacer to move up far enough to bolt to transmission.

Things I did to make it work - ensured it was the right one. Ensured it was clear of dirt. And still wont work.

Please help I am desparate.