Has anyone ever put a '99+ 4l80e in an OBS c1500? After reading this - http://www.ls1truck.com/forums/front...rans-swap.html - it seem like a real PIA. After you buy all those extra parts for the conversion you might as well buy a fully built 4l60e.
What do you do bout the crossmember? Seems like an easier way would be to just drill new holes in the frame for the crossmember. Anyone tried this?
Its easier to swap than in a 99+ truck. If your motor is in the right spot the tranny xmember will bolt right up in existing holes in the frame..Easy.. A stock 4l80E is stronger than a built 60E. Well worth the upgrade if you plan on making power..Originally Posted by flattopwill
I think I've seen a few writeups on that swap over at FSC.
4L80E swap - FSC Forum
Couldn't find a thread on it but I'm pretty sure Oldred95 and a few others have done this swap as well.
I put a 2002 4L80 into my 98. I just slid the crossmember back. 3 of the 4 holes were already in the right spot. The 80 takes a bigger yoke. The wiring is easy. It only involves 5 wires and a reflash.
Jeff
98 GMC RCSB 2wd, 100% internally stock 305, w/twin T-3 junkyard turbos,Ramjet intake w/42lb inj,12200411 PCM. 4675lbs w/me in it. Best time in 5 passes 13.01@110
i'm doing it to my truck it steals like 20% HP if i'm correct but it will last longer then the 4l60e
2004 Silverado:THELSX L.M.E LSX 454 C.I tuned by Llavero 11.1 N/A @121 MPH
2004 Sierra:GUNSLINGER L.M.E LSX 427C.I,Twin Borg Warner/Forced Induction 76mm, th400, Ford 9" with ladder bar
So.....simply slide the xmember back, use 6.0 flexplate and spacer, 4l80e dipstick tube, and I'm good to go? My PCM and harness are already getting worked over by Nelson so I'll just have them set up that part.
Ya, I've heard that but I'm arguing with my wallet and tryin to have the "do it right the first time" attitude.
your on the right track then bro....... dont worry my project already has a year and a 1/2 since I started.
2004 Silverado:THELSX L.M.E LSX 454 C.I tuned by Llavero 11.1 N/A @121 MPH
2004 Sierra:GUNSLINGER L.M.E LSX 427C.I,Twin Borg Warner/Forced Induction 76mm, th400, Ford 9" with ladder bar
just do it, definitely worth it. I did it to my 93 and DBRODs did it to his 95? Its a simple install and well worth the effort. Reuse the stock xmember, rewire the trans electrical connector, add the ISS to the PCM and get a tune overlay added to the PCM.
I had to saw part of the ears of the 80e transmission to clear my headers but other than that it was a straight fwd swap with the right parts.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
So do I need the 6.0 flexplate and spacer?
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