I have recently purchased and installed new tires on my 2002 Jeep TJ and was looking into regearing from 3.73 to 4.11 because of the power loss. What are the disadvantages of not regearing both axles and what is the cost of regearing both vs. just the rear? I assume the advantage of not doing the front is cost.
Regear front and rear?
Apr 24, 2004
10 Replies
no man u regear the front to 5 gearing and the rear to like 1.3 gearing, so ur highway milage is really good this way.
If you change (regear) the rear axle without changing the front axle, you won't be able to use four wheel drive. At least not without destroying your Jeep. Think about it.
Best regards, Dave Rose Cactus Cowboy Big Wonderful Wyoming '49 Willys Pickup (parts truck) '62 Willys Pickup 4WD 226 '98 XJ Sport O|||||||O
I don't think that's enough of a ratio change to be worth doing...
The disadvantage to only regearing the rear would be that your transfer case would blow up in about 15 feet... you have to do both... can't have the front and rear wheels turning at different speeds!
Cost will be $1000-$1200. I wouldn't spend that money to go from 3.73 to 4.10. You lost some power just from bigger tires weighing more.
-jeff
Thanks for the information. I was unsure whether "regearing" meant front and rear. Obviously this was a dumb question though I really didn't understand the ramifications of doing one vs both.
The power loss is bearable though highway driving is not good because of the shift points. Its hard to keep the vehicle going 65-75 mph without constantly shifting down or up. The rpm's constantly seem either too high or too low.
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What size tires did you install?
LT265/75R16 (32's) with plans to probably go slightly bigger in a few years down the line when the vehicle is no longer a daily driver.
My advice you have 2 choices, the best is to regear when you get bigger tires than what you have now and live with the lower RPM's until then. Or regear now to 4.56 so you won't have to do it later and live with the higher RPM's. Regearing is not cheap and there is no reason why you need to pay for it twice.
I put 31x10.5's on my TJ with 3.73's, replaced the stock 30x9.5's, and there was a slight difference but not so much where I felt I had to regear. I went with 4:56's when I got 33's so I wouldn't have to regear again when I go to
35's.
I am running 33's with 3.31 gears and I just gave up on 5th gear.
I get better mileage running in 4th rather than lugging it in 5th now anyway and I have no problems with my 19 US mpg.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT'sBlueshirts wrote:
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