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Jan 23rd, 2013
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Re: Duramax Gear Ratio [Re: Bryan O'] #12712846
04/12/18 02:50 AM
04/12/18 02:50 AM
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texas
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redchevy Offline
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D-max ain’t grunting with 6500 lb travel trailer!

Re: Duramax Gear Ratio [Re: redchevy] #12721259
04/18/18 01:32 PM
04/18/18 01:32 PM
Joined: Mar 2016
Posts: 658
Pearland, TX
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dk2429 Offline
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Pearland, TX
Originally Posted By: redchevy
D-max ain’t grunting with 6500 lb travel trailer!


By grunting I don't mean struggling lol. I guess another way of saying that is "mean sounding"


Majek 22 Extreme/225 Optimax Pro XS
2006 Chevy 2500HD Silverado/6.6 Duramax LBZ


Re: Duramax Gear Ratio [Re: redchevy] #12721527
04/18/18 04:15 PM
04/18/18 04:15 PM
Joined: Jan 2011
Posts: 3,650
On my kayak
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Todd™ Offline
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On my kayak
Originally Posted By: redchevy
GM doesn’t and has never produced the duramax with anything but 3.73’s. The duramax is an option. 4.1:1 gears will be listed as standard equipment and along with the duramax under optional will be 3.73’s.

Wish one of the gm dealers would respond lol none of them have 4.10’s

You're mostly correct but because of so many option levels, mid year changes, and customer custom ordered espcially on work trucks we don't go by the thinking that this is the only way they come. It's best to know what they have by looking up the vehicle build on our special GM website. When we order parts for vehicles we don't tell the parts guy what gear ratio we need or what color a part is. We tell them what we need like a "ring and pinion" or a "door panel" and give them the last 8 of the VIN. They then look up the parts by that vehicles build sheet and give us the part it was built with.

If you want to know what your vehicle was really built with call your local GM dealer parts department and ask them. They will need the last 8 numbers of your VIN to look it up.

Re: Duramax Gear Ratio [Re: Bryan O'] #12721631
04/18/18 05:46 PM
04/18/18 05:46 PM
Joined: Mar 2002
Posts: 470
Too far from Saltwater
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JonBoater Offline
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Too far from Saltwater
redchevy is correct. Every 2500 or 3500 with a duramax (since 2001) will have 3.73's. In this unique case it is very cut and dry. There were no mid year changes, no custom ordering for a different ratio, nothing other than the buyer changing them after purchase.

The only exception in regards to the Duramax would be the Kodiac (top kick?) medium duty trucks. I believe they were available with 4.56 or were all 4.56 not sure.


Re: Duramax Gear Ratio [Re: Bryan O'] #12721759
04/18/18 07:15 PM
04/18/18 07:15 PM
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redchevy Offline
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I pulled up the 8 that where at the dealer the OP said... 3 of them list 4.10 gears and a 6.0 L gas v-8.

Re: Duramax Gear Ratio [Re: Bryan O'] #12722986
04/19/18 07:39 PM
04/19/18 07:39 PM
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Pearland, TX
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dk2429 Offline
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You can even get on Chevy's "Build And Price." As soon as you add the Duramax in the truck, it takes away your 4.10's and adds 3.73's.

Wonder why GM doesn't allow 4.10's on the Duramax..?


Majek 22 Extreme/225 Optimax Pro XS
2006 Chevy 2500HD Silverado/6.6 Duramax LBZ


Re: Duramax Gear Ratio [Re: dk2429] #12723088
04/19/18 08:39 PM
04/19/18 08:39 PM
Joined: Apr 2010
Posts: 19,692
chateau d'if
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patriot07 Online content
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Originally Posted By: dk2429
You can even get on Chevy's "Build And Price." As soon as you add the Duramax in the truck, it takes away your 4.10's and adds 3.73's.

Wonder why GM doesn't allow 4.10's on the Duramax..?
Because you don't need extra torque. It would just be a useless gas mileage hit.


Life can only be understood backwards; but it must be lived forwards.
- Soren Kierkegaard
Re: Duramax Gear Ratio [Re: Bryan O'] #12747680
05/08/18 05:32 PM
05/08/18 05:32 PM
Joined: Jan 2010
Posts: 1,586
Justin, Texas
Justin DuBose Online content
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Justin, Texas
3.73 = 6.6L Duramax Diesel
4.10 = 6.0L Gas

Re: Duramax Gear Ratio [Re: Bryan O'] #12754750
05/14/18 04:55 PM
05/14/18 04:55 PM
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Posts: 105
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TXMako2201 Offline
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Nice to hear so much positivity on the duramax. Never owned one but always wanted one. i have the 5.3 and was thinking about upgrading to the duramax but constantly hear ppl dogging it. too many powerstroke guys with too many opinions i guess!

Re: Duramax Gear Ratio [Re: TXMako2201] #12755032
05/14/18 07:28 PM
05/14/18 07:28 PM
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redchevy Offline
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Originally Posted By: TXMako2201
Nice to hear so much positivity on the duramax. Never owned one but always wanted one. i have the 5.3 and was thinking about upgrading to the duramax but constantly hear ppl dogging it. too many powerstroke guys with too many opinions i guess!


Honestly think you would be hard pressed to go wrong with any of them these days, they are all solid trucks. Ours have always been good. Most people are just brand groupies and don't know much about anything.

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