What would you do??
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Post Fiend
Joined: Jun 2004
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From: Parker, CO
What would you do??
Ok, my truck is an '02 4x4 7.3L. I'm running with a 6" lift and 325/65r20 tires (basically 35.6" tall tires). I still have the stock 3.73 gears and I'm finally getting around to swaping them out. My question is:
Would you go with 4.10's or 4.30's?
I don't tow very often. I do offroad and race on occasion, and will do more in the future. Mostly it's my daily driver. I live in Colorado and I'm tired of lugging the engine at low rpm's when driving up a mountain pass behind traffic. Right now my truck gets great mileage, and I'd like to keep as much of that as possible (which is why I'm not looking at anything over 4.30's)
Right now I'm leaning towards 4.10's, but I'd like to hear some opinions. Thanks
Would you go with 4.10's or 4.30's?
I don't tow very often. I do offroad and race on occasion, and will do more in the future. Mostly it's my daily driver. I live in Colorado and I'm tired of lugging the engine at low rpm's when driving up a mountain pass behind traffic. Right now my truck gets great mileage, and I'd like to keep as much of that as possible (which is why I'm not looking at anything over 4.30's)
Right now I'm leaning towards 4.10's, but I'd like to hear some opinions. Thanks
Postmaster
Joined: Jun 2004
Posts: 2,646
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From: Milky Way Galaxy
I'd go with the 4.30's. But I'm mostly a rockcrawler person, so I think I'm stuck in a "lower is better" mind-frame. Going from basically a 32" tire to the 35.6" tire has given you a new effective gear ratio of 3.35. To get back to an equivalent ratio you'd need 4.15's. Since they're not made, why not bump-up to a 4.30. This would give you just a bit more low-end grunt than the 4.10's, while not being to hard on the MPG's. But having a diesel with low-end grunt anyways means that even if you were to go with the 4.10's, you'd still be just fine.
Postmaster
Joined: Jan 2004
Posts: 4,758
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From: colorado
4.10,s will give you an effective ratio of 3.69 and the 4.30,s will be 3.87. i would go with the 4.30,s because of the added weight of the tires and wheels, and the added wind resistance of your lifted truck.
Post Fiend
Joined: Jul 2005
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From: 21791
if i were you, i would go to a 4.30. im getting 36's in the next two weeks, and im saving up for 4.30's in the future. i have 3.73's and i do agree that a 3.73 is way to tall of a gear. idle down the highway at 55 mph 
Senior User
Joined: May 2003
Posts: 210
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From: Goodrich IL
Well a guy like myself would pass right by the 4.30's and go with 4.56
4.56 gears will put a bigger smile on your face
My truck is gas V10 with 34in tires 4.10 gears suck! 430's would not be worth the cost!
If your not running a WHOLE lot of hi-way I'd say 4.56
Nothing like a little bit of a edge.....
Gene
4.56 gears will put a bigger smile on your face
My truck is gas V10 with 34in tires 4.10 gears suck! 430's would not be worth the cost!
If your not running a WHOLE lot of hi-way I'd say 4.56
Nothing like a little bit of a edge.....
Gene
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
Originally Posted by Geneoh
Well a guy like myself would pass right by the 4.30's and go with 4.56
4.56 gears will put a bigger smile on your face
My truck is gas V10 with 34in tires 4.10 gears suck! 430's would not be worth the cost!
If your not running a WHOLE lot of hi-way I'd say 4.56
Nothing like a little bit of a edge.....
Gene
4.56 gears will put a bigger smile on your face
My truck is gas V10 with 34in tires 4.10 gears suck! 430's would not be worth the cost!
If your not running a WHOLE lot of hi-way I'd say 4.56
Nothing like a little bit of a edge.....
Gene
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Posting Guru
Joined: Jul 2006
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From: New York
I had the 3.73's and I went with the 4.30's. I am very happy I did. It has more torque and acceleration now.
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Post Fiend
Joined: Jul 2005
Posts: 14,582
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From: 21791
well, if they cant find 10.25 gears, i would be hesitant about them. make sure you get the high-pinion (reverse cut i believe) instead of regular rear-axle use.
here is where i would buy my stuff. randy's got some cool stuff.
http://www.ringpinion.com/content/pr...sp?vid=3&pid=4
here is where i would buy my stuff. randy's got some cool stuff.
http://www.ringpinion.com/content/pr...sp?vid=3&pid=4
Posting Guru
Joined: Jul 2006
Posts: 1,191
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From: New York
Yep, Randy's Ring and Pinion is where I got mine from. I got two Yukon ring and pinion gearsets and two master overhaul kits from them. But when the shop did the install, they found a few missing seals and something about a seal not being the right one. They had the right ones in stock, so make sure the shop you pick has the ability to do the job if parts are needed.
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Post Fiend
Joined: Jun 2004
Posts: 9,293
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From: Parker, CO
Thanks for the help.
The shop here does quite a few trucks and Superduties, and I was referred to this shop by someone I trust. They just don't sell the 4.30's very often, which is why they are having a hard time finding the right ring and pinion set. Most superduties that come out of that shop are lifted 8 inches or more, and the guy helping me out said they do 4.56's all the time.
The shop here does quite a few trucks and Superduties, and I was referred to this shop by someone I trust. They just don't sell the 4.30's very often, which is why they are having a hard time finding the right ring and pinion set. Most superduties that come out of that shop are lifted 8 inches or more, and the guy helping me out said they do 4.56's all the time.