Ok so I have seen alot of people on here talk about changing their gears when they get bigger tires correct?! lol so here is my truck that I have been running 315-70-r17's (34.6''x11.8'') for about 2 years and have never had a Transmission/gear problem since? My truck is a 2005 Texas Edition 2WD with the 4.6l and 355's. I have 2.5'' lvl kit with Bilstein 5100's set at 0" (stock) settings with a 2.5'' rear block. This pic is after the ONLY time it has Been in the Mud EVER. The question is: Should I worry about my gears and do I need to change them since I have never had a problem? Thanks


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There are some people on the site that have run 35's with the 3.55's for extended periods of time and haven't had any problems. That setup doesn't guarantee that you'll have tranny problems but it does increase the likely hood a little. Not sure by how much though. People regear so that they can get back some of the power and gas mileage that they lost by increasing their tire size. It is not a necessity but it would definitely help and be a useful upgrade. It would be a little cheaper for you to regear since you have a 2wd. IMO I'd do it if I were you and had the funds.

 

If I was you I would put 4.30 gears in. That will be a good match for your tire size. Only 2wd trucks can use 4.30s so you're lucky there. If you do a lot more city driving than highway, then you may want 4.56 gears. 4.56s are a little too big for getting good highway mileage, but they would be good for towing and city driving. You will love the power increase you'll get from new gears, it makes for a better driving experience

 

Thanks Guys! I will start saving for this, How hard is it to re-gear yourself or should i have a Professional do it? Thanks again

 

If you have never done it and don't have the required tools, have it done professionally.

 

It's a pretty in-depth job. I wouldn't attempt it yourself unless you know somebody that's done it before that can help you. I put my 6" lift on and while I had the axle and front differential out, I took them to a shop and had them put my 4.56 gears in

 

get a transmission cooler on there atleast.

i ran 35's with 3.55 gears for almost 4 years without a problem. but the 4.30 or 4.56 ratios would work just fine.