2bseen Posted November 19, 2004 Report Share Posted November 19, 2004 Has anyone changed to a 80 trans yet? Link to comment Share on other sites More sharing options...
TurbochargedBerserker Posted November 19, 2004 Report Share Posted November 19, 2004 Has anyone changed to a 80 trans yet? <{POST_SNAPBACK}> I doubt it -- you have to give up your AWD unless you are like Kurt and have special one-off parts. Link to comment Share on other sites More sharing options...
2bseen Posted November 20, 2004 Author Report Share Posted November 20, 2004 On ls1tech it is posted that you only have to change input shaft on the transfer case and it is a factory part #. Link to comment Share on other sites More sharing options...
2bseen Posted November 20, 2004 Author Report Share Posted November 20, 2004 http://www.ls1tech.com/forums/showthread.php?t=239516 this is where the part # is listed. Link to comment Share on other sites More sharing options...
vette dude Posted November 20, 2004 Report Share Posted November 20, 2004 Has anyone changed to a 80 trans yet? <{POST_SNAPBACK}> i don get it, if it bolts into the 3/4 ton, then all you are going to need to do is change the rear drive shaft, and get a 3/4 ton front drive shaft, well, and change the crossmember.... Link to comment Share on other sites More sharing options...
SuperSport Posted November 21, 2004 Report Share Posted November 21, 2004 Has anyone changed to a 80 trans yet? <{POST_SNAPBACK}> i don get it, if it bolts into the 3/4 ton, then all you are going to need to do is change the rear drive shaft, and get a 3/4 ton front drive shaft, well, and change the crossmember.... <{POST_SNAPBACK}> the 4L80 tail shaft is 31 spline and the 4L65 is a 28 spline. So the problem isn't the drive shafts its the tranny to transfercase connection. So then the only way it could be done is if you use a 3/4 ton transfer case then lock it into 4 wheel drive manually. Which really isn't so bad. Link to comment Share on other sites More sharing options...
vette dude Posted November 21, 2004 Report Share Posted November 21, 2004 Has anyone changed to a 80 trans yet? <{POST_SNAPBACK}> i don get it, if it bolts into the 3/4 ton, then all you are going to need to do is change the rear drive shaft, and get a 3/4 ton front drive shaft, well, and change the crossmember.... <{POST_SNAPBACK}> the 4L80 tail shaft is 31 spline and the 4L65 is a 28 spline. So the problem isn't the drive shafts its the tranny to transfercase connection. So then the only way it could be done is if you use a 3/4 ton transfer case then lock it into 4 wheel drive manually. Which really isn't so bad. <{POST_SNAPBACK}> yes, this is what i am talking about... Link to comment Share on other sites More sharing options...
edessa Posted November 21, 2004 Report Share Posted November 21, 2004 After reading the post on ls1tech I think all you have to do is change the output shaft of the 80, from a 31 to a 28 spline, and our T-case will bolt up to it. Correct me if I'm wrong. Link to comment Share on other sites More sharing options...
vette dude Posted November 21, 2004 Report Share Posted November 21, 2004 After reading the post on ls1tech I think all you have to do is change the output shaft of the 80, from a 31 to a 28 spline, and our T-case will bolt up to it. Correct me if I'm wrong. <{POST_SNAPBACK}> can someone tell me why you would not use a 3/4 ton T-case??? Link to comment Share on other sites More sharing options...
edessa Posted November 21, 2004 Report Share Posted November 21, 2004 I wouldn't want to because when you turn with our AWD T-case the viscouse coupling slips and you dont get the stiking or bouncing feeling you get with a 4WD t-case when it's set to 4WD. Link to comment Share on other sites More sharing options...
vette dude Posted November 21, 2004 Report Share Posted November 21, 2004 I wouldn't want to because when you turn with our AWD T-case the viscouse coupling slips and you dont get the stiking or bouncing feeling you get with a 4WD t-case when it's set to 4WD. <{POST_SNAPBACK}> ok, i see now... That makes perfect sense... Link to comment Share on other sites More sharing options...
BenKey Posted November 22, 2004 Report Share Posted November 22, 2004 After reading the post on ls1tech I think all you have to do is change the output shaft of the 80, from a 31 to a 28 spline, and our T-case will bolt up to it. Correct me if I'm wrong. <{POST_SNAPBACK}> Actually, I think it's better to have the 31-spline for strength. So, it would be better to change out our t-case. Link to comment Share on other sites More sharing options...
styleandspeed Posted November 22, 2004 Report Share Posted November 22, 2004 Not if you want AWD instead of 4wd though. I would rather have AWD. 4WD would have it's benefits though BURNOUT BABY!!!! Link to comment Share on other sites More sharing options...
vette dude Posted November 22, 2004 Report Share Posted November 22, 2004 Not if you want AWD instead of 4wd though. I would rather have AWD. 4WD would have it's benefits though BURNOUT BABY!!!! <{POST_SNAPBACK}> and the ability to sw3itch to RWD for gas milage, and burnouts Link to comment Share on other sites More sharing options...
TurbochargedBerserker Posted November 22, 2004 Report Share Posted November 22, 2004 According to everyone I talked to, included a couple of GM guys, the owner of advanced adaptors, Kurt @ W2W, Chuck @ FLP, there is no 31 tooth gear that will fit the AWD case (except for the single, one-off piece Kurt is hoarding ) You could always have a one off piece machined, but otherwise, you're looking at swaping in an AutoTrac or a Manual tcase and waving bye bye to the AWD. That's all well and good, but you'd better be a DIY tuner and be prepared to do a lot of work on that tune getting it to actually run. Jim had major trouble getting it to run in his truck, converting from 4WD to manual 4WD... I would not drive a manual 4WD locked in 4WD on the street. You'd be burning through cash replacing front gears and shafts... If you're willing to do all that, might as well put in a manual tranny too Link to comment Share on other sites More sharing options...
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