The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1968 C20 Pickup Trans Swap Questions.... 4L80e

Andy4639 · 07-20-2016, 03:28 AM

I had the 6.0/4l80e installed in my 71 LWB truck. Used the stock transmission cross member and the tunnel was fine no mods at all to it. The transmission is about the same as the 700r4 I had in it before. You will have to have the drive shaft shorten and what do you plan on using to control the 4l80e it works off the ECU and for a speedometer it's electronic.

07-20-2016, 03:28 AM	#5
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: 1968 C20 Pickup Trans Swap Questions.... 4L80e I had the 6.0/4l80e installed in my 71 LWB truck. Used the stock transmission cross member and the tunnel was fine no mods at all to it. The transmission is about the same as the 700r4 I had in it before. You will have to have the drive shaft shorten and what do you plan on using to control the 4l80e it works off the ECU and for a speedometer it's electronic. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.