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Discussion Starter #1
So I've been seeing a lot of post on here about changing gears for different sized tires. I'm new to this 4 wheelin stuff being I just bought my 03 tj, and it's got a 4" lift with 35x12.5x20 rockstar rims with nitto mud grapplers. After reading these post I realized this is why I've been having so much trouble with shifting while going up and down hills. So what size would best Hugo for this setup.? Thanks
 

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Discussion Starter #4
Will 4.88 gears rev the Rpm's to high for interstate driving? I have to drive 30 min down the interstate in order to get to work. Its down a mountain there then 12 hours later its back up the mountain for the ride home.
 

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The correct/optimal axle ratio depends on your engine and transmission type... what engine and transmission type (automatic, 5-speed, or 6-speed) do you have?
 

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Discussion Starter #10
Well it looks like the 4.88s have it then. Looked on you tube to see if it was something I could do myself but it doesn't look like I'd be able to. I would need some sort of press to get the bearings out which I don't have. Any idea how much it would cost me?
 

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Well it looks like the 4.88s have it then. Looked on you tube to see if it was something I could do myself but it doesn't look like I'd be able to. I would need some sort of press to get the bearings out which I don't have. Any idea how much it would cost me?
Have the installing shop provide all parts, that way they will warranty everything... parts and labor. If you instead bought the parts & they installed them, they would just blame your parts if something went wrong after the install... which is not uncommon due to the complexity of installing them.

Total parts & labor costs for both axles cost me <$1100 the last time & just over $1300 the first time... some shops will quote sky-high prices on their initial quote and hope you will not argue or ask for a lower price that they will usually give if you push them hard enough.
 

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Discussion Starter #13
Ok thank you for your response and advice on the subject matter. Now I just need to find someone dependable enough to do the mod here in tn.
 

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I'm running the same set-up with 4.88 gears. The mud grapplers are a heavy tire and you need all the help you can get. You wont feel like your making any power, but you wont be runing back and forth through gears. I also run it interstate at a steady 70-75 mph without problem. It does rev a little high but its not bad.
 

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Your engine only revs "a little high" when compared to a car with small tires. For a Jeep with the aerodynamics of a barn door running big heavy tires like your 35's, your RPMs are right where they should be... assuming your configuration is really the same as the OP's... with the 5-speed manual transmission. :)
 
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