4X4 4L80E in a 2wd 71 sub, any pointers? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

woodman13 · 08-23-2004, 10:54 PM

Not home yet(from IRAQ), but gathering parts....(can never have enough parts for a project). I have a 4L80E 4X4 trans that I was thinking about putting in my 71 2wd sub. I was hoping someone may have done this swap and could give me a parts list or some pointers on it to make it smooth. I am going home on R&R leave soon and want to work on the ole sub while I am home. I figured a TCM, harness for TCM, crossmember, and a 2wd tailshaft housing for the rear of the 4X4 trans(since i am not using the transfer) ; can this be done? This transmission looks a little different than the one in my 68 Camaro and my 68 already had the 4L80 in it when I bought it! What year vehicle could all this come from? I hope since I got a good deal on the trans(free) it will work with little heartache. Any help would be great.

1969 GMC · 08-24-2004, 02:50 AM

I believe the 4l80e was available in one tons and perhaps some 3/4 tons starting in 1991. I do know that all V30's (K30) made in '91 with an automatic tranny got the 4l80e, and also the civilian Hummer H1 and the military HMMW both used it. It will need a control module, which is part of the ECM in gas trucks and is a standalone unit in early non-computerized diesel trucks.

grape · 10-31-2004, 03:05 PM

I'd like to trade you transmissions, sending pm

08-23-2004, 10:54 PM	#1
woodman13 woodman13 Join Date: Jul 2004 Location: Moody, Tx Posts: 261	4X4 4L80E in a 2wd 71 sub, any pointers? Not home yet(from IRAQ), but gathering parts....(can never have enough parts for a project). I have a 4L80E 4X4 trans that I was thinking about putting in my 71 2wd sub. I was hoping someone may have done this swap and could give me a parts list or some pointers on it to make it smooth. I am going home on R&R leave soon and want to work on the ole sub while I am home. I figured a TCM, harness for TCM, crossmember, and a 2wd tailshaft housing for the rear of the 4X4 trans(since i am not using the transfer) ; can this be done? This transmission looks a little different than the one in my 68 Camaro and my 68 already had the 4L80 in it when I bought it! What year vehicle could all this come from? I hope since I got a good deal on the trans(free) it will work with little heartache. Any help would be great. __________________ Woodman13 2007 Dodge Ram 3500 5.9 rolling coal! 1994 Caprice 9C1 88K miles, LT-1, dropped/shaved 1967 C-30 350 4 sp dually 1971 C10 SWB BBC, auto; good driver

08-24-2004, 02:50 AM	#2
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	I believe the 4l80e was available in one tons and perhaps some 3/4 tons starting in 1991. I do know that all V30's (K30) made in '91 with an automatic tranny got the 4l80e, and also the civilian Hummer H1 and the military HMMW both used it. It will need a control module, which is part of the ECM in gas trucks and is a standalone unit in early non-computerized diesel trucks. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

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10-31-2004, 03:05 PM	#3
grape Registered User Join Date: Dec 2003 Location: Ft. Worth, TX Posts: 86	I'd like to trade you transmissions, sending pm



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