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Old 02-12-2017, 10:29 AM
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Miss Rita Miss Rita is offline
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used Suburbans

I'm starting VERY early shopping to replace my '02 Tahoe with a newer Suburban, looking at something 3-5 years old.

The Tahoe has 3.73 gears to go along with the four speed AT. It seems that most of the newer vehicles have 3.42 gears (or even 3.08) and a 6-speed tranny.

Is it correct to assume that this is the new standard spec for a towing package?
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Old 02-12-2017, 10:54 AM
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Originally Posted by Miss Rita View Post
I'm starting VERY early shopping to replace my '02 Tahoe with a newer Suburban, looking at something 3-5 years old.

The Tahoe has 3.73 gears to go along with the four speed AT. It seems that most of the newer vehicles have 3.42 gears (or even 3.08) and a 6-speed tranny.

Is it correct to assume that this is the new standard spec for a towing package?
Yes, lots of trucks have that setup now. My 2011 F-350 has a 6spd with 3.73.
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Old 02-12-2017, 10:59 AM
fstaslp fstaslp is offline
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DO NOT get the 3.08 gears in the GM with the 6 speed. I had it in my 2014 Sierra CC. While it did get the job done, it was rated for like 6200 lbs. Made me nervous with my 1999 230VRS. We then towed it with the touareg, rated for 7700 lbs and it did much better.

I will get another truck and I will be on the look out for the highest numerical gear I can find after working with the 3.08. Also, the truck was tuned and ran well, but I always yearned for better gears.
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Old 02-12-2017, 02:21 PM
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the 4.03 first gear in the 6l80 with the 3.08 equals a ratio of 12.41 while the 3.06 first in the 4l60with the 3.73 equals 11.41.
The 6l80 trucks don't need a higher numerically rear end though it would be more fun
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Old 02-12-2017, 02:42 PM
fstaslp fstaslp is offline
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Maybe not needed but I with the two extra gears, the truck would be constantly shifting towing on grades. First gear wasn't really the problem.
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Old 02-16-2017, 01:14 PM
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Quote:
Originally Posted by 1redTA View Post
the 4.03 first gear in the 6l80 with the 3.08 equals a ratio of 12.41 while the 3.06 first in the 4l60with the 3.73 equals 11.41.
The 6l80 trucks don't need a higher numerically rear end though it would be more fun
I believe the Burbs with the 5.3L come with the 6L60 or 65 and the 6L80 only comes behind the 6.2L in the Escalades and Denali's. The Burbs didn't come the six speed trans until 2009 model year while the Escalades and Denali's had the six speed from 2007. So if you can find a 2007-2009 Burb with the four speed trans you can get the 3.42 or 3.73 ratio but once the six speeds were introduced in 2009 you could only get 3.08's. There could be 3.42's out there but my guess would be they are hard to find used.
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Old 02-16-2017, 05:09 PM
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Originally Posted by Forrest-X45 View Post
I believe the Burbs with the 5.3L come with the 6L60 or 65 and the 6L80 only comes behind the 6.2L in the Escalades and Denali's. The Burbs didn't come the six speed trans until 2009 model year while the Escalades and Denali's had the six speed from 2007. So if you can find a 2007-2009 Burb with the four speed trans you can get the 3.42 or 3.73 ratio but once the six speeds were introduced in 2009 you could only get 3.08's. There could be 3.42's out there but my guess would be they are hard to find used.
My 2011 Burb has the heavy duty towing package with the 5.3 & 3.42 rear end. Trans is 6sp with manual mode.
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Old 02-17-2017, 10:19 AM
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Thanks for the replies. It makes sense that with the addition of a 6-speed tranny the differential ratio could be numerically lower. I'm so used to seeing the 3.73 number for the past 30 years that the new lower ratios caught me off guard
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Old 02-18-2017, 08:01 AM
waterlogged882 waterlogged882 is offline
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Originally Posted by Miss Rita View Post
Thanks for the replies. It makes sense that with the addition of a 6-speed tranny the differential ratio could be numerically lower. I'm so used to seeing the 3.73 number for the past 30 years that the new lower ratios caught me off guard
Don't be caught off guard....stick with the 3.73:1 or taller.
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