Re-gearing Trans

[USMC_315]

Put on 35's recently and I love them, however on the highway not so much. Very slow pick up, and most of the time it doesn't even kick down a gear. How or where can I get the transmission re-geared

 

[RamRod]

Put on 35's recently and I love them, however on the highway not so much. Very slow pick up, and most of the time it doesn't even kick down a gear. How or where can I get the transmission re-geared

First do you know your Axle gearing?


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[USMC_315]

First do you know your Axle gearing?


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I don't

 

[RamRod]

I would start there, if by chance you don't already have the 4.56 gearing that would be a lot less of a headache then changing out the gearing of your trans


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[Cash9300]

Yours is an alpha isn't it


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[USMC_315]

Yours is an alpha isn't it


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yes, an '09

 

[USMC_315]

also it doesn't have the adv. package or whatever it was called for the alphas

 

[Cash9300]

I'm pretty sure the alphas have 4:11 gears front and back I know someone here can confirm that


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[USMC_315]

so either way of the gearing whether it be 4:11 or 4:56, how should I correct my issue

 

[cgalpha08]

alphas came with the 4.10s, I regeared to 4.56 and it rides closer to stock. I cant compare it to having 35's with stock gears because i regeared to 4.56 before i put bigger tires on.

IMO regearing the trans is going to a lot more work and headache for what you may get out of it.

 

[alrock]

Agreed, if you want to change gearing get the front and rear diffs regeared to 4.56

 

[amrg]

Or drop a 6 speed trans and you're good to go (been done)

 

[4speedfunk]

I've never heard of "re-gearing" a transmission. I know some drag racers that run lower first gears, but it's not really done for the same reason. I've also heard of underdrive units that can be installed somewhere in the driveline....but that sounds overly complicated for what you are trying to do.
I know several guys that run 4,56 axle gearing in their Alphas....seems to work very well. Also, you can send your chip to PCMofNC for some tweaking. They can adjust the shift points and timing to help with the gear hunting that large tires often bring. They can correct the speedo too.

 

[rsc]

The Camaro and Corvette guys had a new 2nd gear developed to fix the 1-2 shift gap when drag racing. It isn't something that would benefit our transmissions. I have not run across anyone offering a new planetary to lower the OD ratio which I would really like on the H3.

 

[High Five H2]

Regear axles, or do a 6 speed swap. I'd do the 6 speed if it were me.

 

[CaseyS]

Regear to 4.56 and be done with it. Mainstream project that just about any reputable shop can do with shelf parts. Figure about $1800-$2000 for a shop to do this or cheaper if you can find some takeout gears and some labor that will work for beer.

 

[mantracker]

By the way, what's the gearing on a 2006 H3 Adventure? I've been thinking about putting 35's on my rig.

 

[rsc]

Post #9 covers your answer unless you are looking for the overall final drive ratio in top gear (or some other gear).