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		Chevy and GMC Duramax Diesel Forum > Chevy / GMC Duramax 07.5+ LMM Forums > 07.5+ LMM Duramax Powertrain
Gear Ratio

07.5+ LMM Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

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11-02-2009, 06:19 PM	eBay Motors #1 (permalink)
FLADMAX Junior Member Join Date: Sep 2009 Location: Central Florida Posts: 21	Gear Ratio I have 373 gears with 35" tires. I am considering changing to 411 gear ratio to help on the low end a little. Good idea or bad idea?? __________________ 2009 GMC Sierra 2500HD, 6.6L LMM, 4" lift, 35" MT ATZ's, 20" Moto Metal, Cognito tie rods, Rancho steering stabilizer, Line X, Banks ram air, monster exhaust, intercooler and six gun tuner with IQ, FTI Billet Triple Lock Up converter, Red Eagle cluthes, Kolene steels and Transgo Jr. Shift Kit.

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11-02-2009, 06:21 PM	eBay Motors #2 (permalink)
Hondarider552 Still on build 66 :) Join Date: Nov 2008 Location: Chandler, AZ Posts: 5,501	good idea. IMO with any truck; if you lift it, re-gear it. __________________ Brian, 19, 06 LBZ, EFILive, MM Diesel Performance, Alligator Performance, Suncoast, TTS, Cognito, High Tech Turbo, PPE, Magnaflow540rwhp/1000tq. 12.64/107.52

11-02-2009, 06:24 PM	eBay Motors #3 (permalink)
Ridin'GMC DuramaxForum Veteran Join Date: Mar 2007 Location: San Tan Valley, Arizona Posts: 2,116	4.11 is better than 4.56 gearings. 4.56 will bring it back to stock but you will see higher rpms at highway speeds. __________________ 06 LLY CCSB Just another white truck on the site. Tuned by Killerbee's Original LBZ tune. 480 rwhp & 830 lb-ft of torque as of 11-7-09 on stock tranny

11-02-2009, 06:26 PM	eBay Motors #4 (permalink)
FLADMAX Junior Member Join Date: Sep 2009 Location: Central Florida Posts: 21	Thanks for the input. What would reasonable price be for the new gears installed? __________________ 2009 GMC Sierra 2500HD, 6.6L LMM, 4" lift, 35" MT ATZ's, 20" Moto Metal, Cognito tie rods, Rancho steering stabilizer, Line X, Banks ram air, monster exhaust, intercooler and six gun tuner with IQ, FTI Billet Triple Lock Up converter, Red Eagle cluthes, Kolene steels and Transgo Jr. Shift Kit.

11-02-2009, 06:28 PM	eBay Motors #5 (permalink)
Hondarider552 Still on build 66 :) Join Date: Nov 2008 Location: Chandler, AZ Posts: 5,501	probably around 700 for labor and 350 for the gears. if you dont have enough cash to do it at once, do the back first, and pull front driveshaft untill you can do the front __________________ Brian, 19, 06 LBZ, EFILive, MM Diesel Performance, Alligator Performance, Suncoast, TTS, Cognito, High Tech Turbo, PPE, Magnaflow540rwhp/1000tq. 12.64/107.52

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