LS-1motor 4L60-E tranny
08-25-2014, 08:54 PM
#1
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LS-1motor 4L60-E tranny I have a 99 vette LS-1 motor and a 99 Yukon 4L60-E tranny. The bell housing bolt pattern does not match the LS-1 bolt holes, no 12 o'clock in bell housing. I thought all 4L60-E bolted up to all LS-1 motors. Where are I wrong? Tks any help. I think I got everything else handled except tuner in Richmond VA area that also convert my 99 Suburban wiring harness.
08-25-2014, 10:22 PM
#2
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The LS1 Corvettes use the LT-style trans with 298 input shaft. I.e. the older pre-LS style. Sometimes I and others forget to mention that "detail". I apologize if one of my posts here mislead you.
OOPS - I thought you were hooking up a Corvette trans to a LS1 motor. Sorry.
OOPS - I thought you were hooking up a Corvette trans to a LS1 motor. Sorry.
Last edited by mrvedit; 09-15-2014 at 12:30 PM.
09-14-2014, 04:34 PM
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The ls1 motor does not match up to the lt1 bell housing bolt pattern. The ls1 has a hole hole at 12 o'clock. The lt1 motor does not.
09-15-2014, 04:26 PM
#5
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Sorry, I misread your original post. See my Oops abov in #2.
Based on how I read this Wikipedia article, the '99 was the last year the Yukon had an older style SBC/LT1 engine and not the LS1 that came out for it in 2000:
http://en.wikipedia.org/wiki/Chevrolet_Tahoe
Therefore, the transmission would be an LT-style 4L60E with a 298mm input shaft. It would require a spacer, special flexplate and LT-style converter to hook up.
As Brian mentioned, a picture of the front input shaft will remove all doubt.
Based on how I read this Wikipedia article, the '99 was the last year the Yukon had an older style SBC/LT1 engine and not the LS1 that came out for it in 2000:
http://en.wikipedia.org/wiki/Chevrolet_Tahoe
Therefore, the transmission would be an LT-style 4L60E with a 298mm input shaft. It would require a spacer, special flexplate and LT-style converter to hook up.
As Brian mentioned, a picture of the front input shaft will remove all doubt.
Last edited by mrvedit; 09-16-2014 at 08:28 AM.
09-16-2014, 08:24 AM
#6
This looks to be correct. Thought all of the trucks changed over in 99, but they didn't. Good catch mrvedit. I would assume the op has the LT style trans. A picture would be the end all.
-Brian
-Brian