Tj gears

Corigirlloves

Corigirlloves

Lady Jeeper
Joined
Nov 20, 2011
Location
Denver, NC
So I've been reading a lot of forums and have been getting a lot of mixed reviews and signals and thoughts about lifts, tire size, axels, and gear ratios.

Right now im running a stock tj, with the 3.83 gear ratio and general grabber 31" mud tires.

I just got a 4" suspension lift id like to install and eventually get bigger tires, i still have a good percentage of tread left on mine.

Now- here's where i need help- if i want to install the lift or get bigger tires with flat fenders, what gear ratio should i look for? Do i need to upgrade my axels? How bad are suspension lifts for a daily driver/weekend off roader? Should i avoid the lift and go just for flat fenders? If that, what gear for those?

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The only reason to regear is when you change tire size. I do not know much about the tj except that it has a motor that makes a lot more torque and low end power than my motor. Speaking to just the gear ratio, I would suggest regearing to 4.10 to go to a 33" tire or 4.56 for 35" tires. I think a 35" tire would be as tall as you could go on a 4" lift. The tj guys will chime in and correct me if I am wrong.
 
Like ^ said, the only reason to regear is to compensate for bigger tires. The larger tire changes the leverage ratio from the road to the centerline of the axle, so by regearing, you counteract those forces. 4.56 and 35's is a great combo that I ran for many years. 33's and 4.10's are good too, but with 3.73's, I wouldn't bother paying the money to regear if you're just going to 33's. Is your jeep auto or 5spd manual?
 
You definetly need to pay attention to your rear axle before you go bigger and base it on youre wheeling style. i you have a d35 in the rear you really shoudnt go any bigger than 33,s and do not lock the d 35 either( It WILL break). As far as gearing goes, if you have a manual, Id agree with brad, If an auto I would bump up too 4.56 on 33, 4.88 on 35s. You will also have to consider your drive shaft in the rear, with more than a budget boost you will have to install a slip yoke eliminator on the t case and get a cv drive shaft. Being in asheville, Take it by buckeye performance,,(Chris Ellis) Novacayne on hear. He has extensive knowledge on what you are looking to do and can explain youre options.
 
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