Difference in the converter is the only reason.

 

where can you buy the parts such as accumulator valve and seperator plate, servo's.

 

Check out Oregon performance's store on E-Bay. They should have everything you need.

 

That's where I got everyone of my parts except the converter.

 

Yup, I got the converter from summit.

 

what does enlarging the holes do?? is it a must?? -hope that wasent a stupid q'-

 

It is part of the Transgo install as it is in their instructions. I was just telling you the exact sizes I enlarged them to because they give you 2 different sizes you can drill them out to. It definetly needs to be done.

 

its very easy dont be scared of it just take you time and you will find it to be very easy and a little time consuming but thats it oh yeah dont forget to plug the plug back in for the electronics (i did that and went to go drive it and it stayed in 2nd and freaked me out)

 

Hey fellas i have a 99 2 door yukon 2wheel drive. How would I know what trans it has?

 

Chances are u have a 4L60E