4l80 is in. Looking for advice on 4.10's
04-03-2006, 10:06 PM
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Originally Posted by three83
I test drove an 05 CC with 3.23 then drove the truck I have now with 3.73 and there was a Huge difference. I've also been told that because the 80e is a stronger "bigger" trans that it will rob power when compared to a 60e. I've also heard that about going from a 10bolt rear to a 12 bolt rear. If this is true this could also add the slow out of the whole issue do to trans gear ratios.
A local 4x4 shop recommends using GM (OEM) Gears as a first choice, Motive second choice, yukon third choice. They only use Richmond gears in Off-Road only applications where you generally won't hear the noise they make.
A local 4x4 shop recommends using GM (OEM) Gears as a first choice, Motive second choice, yukon third choice. They only use Richmond gears in Off-Road only applications where you generally won't hear the noise they make.
James
04-04-2006, 06:07 PM
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In terms of drive ratios 4.56 gears will bring the final drive ratio similar to a 4L60 with 3.73. I think that is way too high for every day use but great for the track. 
04-04-2006, 06:26 PM
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Originally Posted by Jamesbond2509
In terms of drive ratios 4.56 gears will bring the final drive ratio similar to a 4L60 with 3.73. I think that is way too high for every day use but great for the track.
80e 1st 2.48,2nd 1.48 3rd 1:1 OD 0.75
60e 1st 3.06 2nd 1.63 3rd 1:1 OD 0.70
I hate the deep 1st gear of the 60e, when it shifts to 2nd the revs come down to far, aftershift torque recovery sucks.
peace
Hog
04-04-2006, 06:38 PM
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Originally Posted by Jamesbond2509
Hopefully you can read the attached table. Upsizing the gears to 4.11s combined with the 4l80 will mean that the 2nd gear ratio will be identical to the 4L60 with 3.73 with a final drive ratio of 6.08. The first gear drive ratio will be a little closer but still different by 10%. I would like to hear feedback from people who have increased gear ratios on after a 4l80 swap. anyone? 
Well I have 4.10 in mine, I thought it had 3.73s until I went to replace them.
04-04-2006, 06:45 PM
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Originally Posted by hog
Maybe for the 1st gear final ratio, but the 4l80e has a lower OD gear than the 60e does. You will need a 4.10 gear with the 80e to equal the cruise of 4.56's with a 60e, roughly.
80e 1st 2.48,2nd 1.48 3rd 1:1 OD 0.75
60e 1st 3.06 2nd 1.63 3rd 1:1 OD 0.70
I hate the deep 1st gear of the 60e, when it shifts to 2nd the revs come down to far, aftershift torque recovery sucks.
peace
Hog
80e 1st 2.48,2nd 1.48 3rd 1:1 OD 0.75
60e 1st 3.06 2nd 1.63 3rd 1:1 OD 0.70
I hate the deep 1st gear of the 60e, when it shifts to 2nd the revs come down to far, aftershift torque recovery sucks.
peace
Hog
Correction, your right - I meant total drive ratio in first gear. The rest are different.
cheers
04-04-2006, 06:46 PM
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Originally Posted by Wilde Racing
Well I have 4.10 in mine, I thought it had 3.73s until I went to replace them.
Ah Thats probably how you are managing those impressive burn outs.
04-04-2006, 06:54 PM
#19
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I run 3.73s with my 4L80E,my truck makes enough torque to absolutely roast the tires.I have run taller gears,but the 3.73s allow me to walk the Tahoe out of the hole with no loss of accelaration.4.56s were impossable to live with,it broke the tires lose with only slight throttle applications and driving in the rain was plain scarey.Plus with the 3.73s highway crusing is much more relaxed not to mention the fuel milage.Go with a 3000rpm stall and leave the 3.73s.
04-04-2006, 08:18 PM
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That 402 probably is a big factor! I currently have a converter rated at 2900. Still a little sluggish at the bottom end. The other problem is Im running 285-75-R16 tire that also are quite the PIGs. So Im hoping 4.10s will at least do all right for this setup.