My truck is a 2000 silvy rcsb 4x4 with autotrac. I have a line on a 2000 4l80e from a 6.0 4x4.I need confirmation on some things. First is that the tranny I need and will my autotrac bolt righ up? I need the flex plate from the 6.0 to go with the tranny. I've read that I don't need a spacer with the 99/2000 tranny. I will have to modify the cross member. Where is the cheapest to get a pigtail adapter? I've read that my driveshafts will be fine but will have to upgrade the yolk. I have someone to deal with the tune. Anything else?

 

Check out the 4L60E-4L80E information in the stickies.
https://www.performancetrucks.net/fo...k-here-460144/

 

I seen the first page but went on elsewhere. I see his is a ec mine is a rc, I was told that I won't need any playing with the driveshafts. This is the reasoning for my "me" specific questioning as I've read that different people have different setups. Why is he messing with the Transfercase input shaft? Is it necessisary or was it something he wanted?.

 

You have to swap out the T-Case input gear as the 60E and 80E have different size and # of spline output shafts. As for driveshafts I cannot say for sure but the 80E is longer no matter what configuration, I know I am going to have to shorten my driveshaft on mine when I do the swap shortly as well as get a longer front driveshaft.

 

What if the tranny came with the t case? If its an autotrac.

 

If you get a 80E and a transfer case as a combo or a t-case that was on a 80e then no need to swap it, the swap is only if the transfer case was on a 60E.

 

Gotcha, thanks.

 

Any clarification on the flex plate spacer?

 

I got the 80e with the converter. I also got the flexplate that was on the 6.0 that was coupled to the tranny. The flexpate came without te spacer. Since I have all parts, will they bolt up with no problem?

 

Anyone? I'd like to get started in the install.