Mystery Bird

iTrader: (7)

I can't find the u joint I need to join my stock DS to the 4l80e yoke. I went to NAPA and they ordered one from their conversion chart. The end caps work but the length of the joint on the 4l80e yoke is too short. I'm tired of searching can someone please help?

I should add the 4l80e and yoke are from a 2002 GMC two wheel drive 3/4 ton truck w/6.0 engine.

Mystery Bird

iTrader: (7)

Another parts store hooked me up with the Moog 372...not even close. I can't be the only person that has had this issue.

SSZ

There is a way to match the u-joint with measurements. I think you can find that through driveshaft companies like Denny's that show what measurements are required to know what you are dealing with. Hope that helps.
Here is something to work with. THere is more info on the site.
http://www.dennysdriveshaft.com/app/...iagrams/e.html

Mystery Bird

iTrader: (7)

Thanks for the link. I did take measurements but cannot find anything. The measurements refer to a S44 on the driveshaft and a 1410 on the yoke side. Guess I have to order a different yoke.

SSZ

Gee, didnt think the yokes were that big on those trucks. Yeah, if nobody has a conversion joist then i think you are stuck. Try any truck or industrial shops? Even like the offroad 4x4 shops may have something.

Smo's04Gto

iTrader: (8)

http://www.summitracing.com/search/d...350-conversion

I guess you looked at all the conversion u joints on summit?

SSZ

Nice link.

Mystery Bird

iTrader: (7)

I looked so many places and asked so many people, I gave up last night and ordered a TH400 yoke. Thanks though I appreciate everyone who tried to help.

MillsMotorvation

Will be doing this soon, thanks for helping me on choices

evo462

iTrader: (27)

I initially ordered a TH400 yoke for my LS1 driveshaft. However, what I didn't realize at the time was that my output shaft on the transmission was the "o-ring" style, which the TH400 yoke with splines all the way to the end would not fit on it.

I ordered mine from Jake's Performance and it fit on the output shaft perfectly. Maybe your output shaft is non o-ring'd but I'd check before you go trying to slide it on and then find it won't fit.

My 4L80e is a 1993 unit, 2WD FWIW