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01-31-2012, 01:09 AM
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Hummer Expert
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Join Date: Feb 2011
Posts: 620
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Regearing?
Alright guys I need to regear my '08 SUT from the stock 3.73's..what would my best option be? Keep in mind that mine is the new 6-speed. My 3.73's just aren't strong enough to push 38's with 20's. Help please!
__________________
'08 Birch White SUT
20X10" BMF S.O.T.A Wheels
38X13.5X20 Toyo Open Country M/T
AMP Research Steps
10" JL Audio sub w/ box and amp
Truxxx Lift 2.5" F-1.5" R
4" Rancho Lift
Corsa Sport Cat Back Exhaust
K&N Cold Air Intake
Spare Removed
RealWheels Eliminator Kit w/o hooks
Defenderworx hooks
Body matched grille
Ford Raptor 6.2L emblem
GS Creations Plexi-glass tail light and front turn tint
RealWheels Oversized Black Hood Handles
Recon Smoked Cab lights
More...
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01-31-2012, 01:16 PM
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Hummer Veteran
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Join Date: Nov 2009
Location: Hambach, Germany
Posts: 78
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Re: Regearing?
I went with 4.56s. I have 37s. With the 38s, you might want to go to 4.88s. Depends on how much you travel on the highway, and how much time offroad.
__________________
2003 H2, 408 CI, K1 Forged 4" stroke crank, K1 6.125" forged rods, Wiseco X-Series 0.30 forged pistons, Schneider cam, FAST 102mm LSXRT, precision flow injectors, Comp Pro Magnum rockers, SA Gear DR timing set, ARP main studs, 90mm ETC TB, Airaid MIT, MSD Coils/wires, Dynatech Headers/high flow cats, Magnaflow, Jessie James Black Widows 20x9, Nitto Dune Grapplers 37", Fabtech 6" lift, CK Performance XHD 4l70e and 4.56 Gears
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01-31-2012, 02:28 PM
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Hummer Expert
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Join Date: Feb 2011
Posts: 620
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Re: Regearing?
Right now it's more highway than offroad..my truck is about 90% street 10% offroad
__________________
'08 Birch White SUT
20X10" BMF S.O.T.A Wheels
38X13.5X20 Toyo Open Country M/T
AMP Research Steps
10" JL Audio sub w/ box and amp
Truxxx Lift 2.5" F-1.5" R
4" Rancho Lift
Corsa Sport Cat Back Exhaust
K&N Cold Air Intake
Spare Removed
RealWheels Eliminator Kit w/o hooks
Defenderworx hooks
Body matched grille
Ford Raptor 6.2L emblem
GS Creations Plexi-glass tail light and front turn tint
RealWheels Oversized Black Hood Handles
Recon Smoked Cab lights
More...
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01-31-2012, 05:28 PM
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Hummer Authority
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Join Date: Jan 2008
Location: Gaithersburg, MD
Posts: 1,763
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Re: Regearing?
Check out this 'gear calculator': http://www.4lo.com/calc/geartire.php
My 05 had 4.10s stock, when I move to 37s it started to drag ass, so punched my info in the 'calculator' to find out what gears would give me an effective ratio closest to stock.
The tire size change had reduced my effective ratio to 3.88 and the calculator indicated that 4.33s would put my effective ratio back up to the stock level. Since they don't make 4.33s I went to the next 'lowest,' 4.56s, and have been a happy camper every since.
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CNTRY
DTOM
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01-31-2012, 07:03 PM
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Hummer Expert
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Join Date: Feb 2011
Posts: 620
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Re: Regearing?
It's showing me at 4.05..do you think 4.10's would be enough?
__________________
'08 Birch White SUT
20X10" BMF S.O.T.A Wheels
38X13.5X20 Toyo Open Country M/T
AMP Research Steps
10" JL Audio sub w/ box and amp
Truxxx Lift 2.5" F-1.5" R
4" Rancho Lift
Corsa Sport Cat Back Exhaust
K&N Cold Air Intake
Spare Removed
RealWheels Eliminator Kit w/o hooks
Defenderworx hooks
Body matched grille
Ford Raptor 6.2L emblem
GS Creations Plexi-glass tail light and front turn tint
RealWheels Oversized Black Hood Handles
Recon Smoked Cab lights
More...
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01-31-2012, 07:03 PM
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Hummer Professional
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Join Date: Nov 2009
Location: Windermere, FL
Posts: 297
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Re: Regearing?
I did 4.88's with 38" Toyos and it made a HUGE difference. That gearing works well with my new 40's as well.
__________________
White 2005 SUT, Lifted 7.5" via Fabtech/custom work, Fabtech Dirt Logic 2.25 shocks, 40x15.5x22 Toyo's, black 22" Fuel wheels, 4.88 gears, Dynatech long tube headers, Magnaflow exhaust, Air-raid intake, Superchips programmer, Edlebrock panhard bar, Cognito UCA's, Kryptonite tie rods, Cognito pitman/idlar arm gussets, Hotchkis swaybars and trailing arms, Amp Research steps, E&G fender flares, PIAA SMR's, smoked roof lights (bulbs removed), black suede headliner, 13" JL's under seat
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01-31-2012, 07:08 PM
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Hummer Expert
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Join Date: Feb 2011
Posts: 620
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Re: Regearing?
Does yours have the 4-speed tranny or 6? Mine has stock 3.73s with a 6-speed. I punched my numbers in the gear calculator and it's saying I should move to 4.10s
__________________
'08 Birch White SUT
20X10" BMF S.O.T.A Wheels
38X13.5X20 Toyo Open Country M/T
AMP Research Steps
10" JL Audio sub w/ box and amp
Truxxx Lift 2.5" F-1.5" R
4" Rancho Lift
Corsa Sport Cat Back Exhaust
K&N Cold Air Intake
Spare Removed
RealWheels Eliminator Kit w/o hooks
Defenderworx hooks
Body matched grille
Ford Raptor 6.2L emblem
GS Creations Plexi-glass tail light and front turn tint
RealWheels Oversized Black Hood Handles
Recon Smoked Cab lights
More...
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