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Old 08-09-2010, 05:09 PM   #1
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Gears Gears Gears..

idk much about gears but im lifting my tj up 4.5 inches and getting 35 inch m/t mtz. what gear ratio is closest set to the median of both off road and highway use. im of at school and im on the highway alot but at the same time i go to school dead smack in the middle of bfe alabama. so id like good preformance on both ends. from what i looked up it looks like 4.56 or 4.88. i also saw some where that dana 35 or w/e the smaller stock axle is. cant handle 35's is this true. or just for those who abuse ther axles. thanks!

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Old 08-09-2010, 05:12 PM   #2
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first off, what is your engine and transmission combo? that is a big factor in what gears you need. and now, the d35 does not like 35 inch tires.

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Old 08-09-2010, 06:07 PM   #3
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That Schnutzy is one smart feller.... What rear axle, engine and transmission?
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Old 08-09-2010, 06:52 PM   #4
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That Schnutzy is one smart feller.... What rear axle, engine and transmission?
ive had a lot of time to sit around and take things in.
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Old 08-10-2010, 12:34 AM   #5
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6 cyl manual trans and Dana 35 i think. Idk how to Check?
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Old 08-10-2010, 08:32 AM   #6
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If the diff on the back has a rubber fill plug it is the 35, metal plug it is the 44. Lot's of threads on here as to how to check. The folks that know a lot of things will tell you that 4.88 are the best gears for 35 inch tires although 4.56 may be slightly better for highway. They will also tell you that the two 35's do not go together well.
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Old 08-10-2010, 08:45 AM   #7
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Check this chart out - it that shows the better gas mileage vs more power
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Old 08-10-2010, 11:59 AM   #8
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Check this chart out - it that shows the better gas mileage vs more power
you have to be very careful with those charts. as they dont take into account different things like what engine, what transmission, and stuff. ex: the chart says that 4.10s would be an economical gear for 35s. try this and you will probably be very disappointed at the performance and gas millage with the straight 6 cause you will still be lugging the engine a bit, up hills etc. do that with either of the 4 cylinders, and you wont be moving much at all.

the best way to find out what gears you need, is to ask people who have already done it.
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Old 08-10-2010, 02:17 PM   #9
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Ok I have the Dana 35. I think I might upgrade to the ox lockers with the superior Dana 44 axles eventually. So 4.56 gears will prob be the best I'm gonna get with that setup? Or could I get by with a gear upgrade on my axles?
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Old 08-10-2010, 02:40 PM   #10
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Personally I believe 4.88 is a far better ratio for 35" tires and 5-speed, I ran that combo for years and would not have been happy with 4.56. But I would not install 35" tires, especially with a 4.88, onto a stock Dana 35 as that axle just isn't strong enough for that big of a tire, especially when the axle is properly geared for it which increases the amount of torque delivered through the axle to the tires.

The only way I would run 35" tires on a Dana 35 is after installing either a Super 35 or C-Clip Eliminator kit from Superior Axle. The first kit includes a full-case locker, the second kit does not.
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Old 08-10-2010, 08:54 PM   #11
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Gotcha that clarifies it up for me. Is there any real perks to upgrading al that or would 33's with 4.10 gears gears get me where I need to go. Because I'd have a lot more flex wouldn't I?
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Old 08-10-2010, 09:01 PM   #12
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if you get 4.10s, then down the road you will wish you had 4.88s, then you will not only have to gear up again, but beef up your axle(if you havent had to replace it already.)
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Old 08-10-2010, 09:10 PM   #13
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4.88 with 33's on a stock 35 axle?
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Old 08-10-2010, 09:12 PM   #14
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Quote:
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if you get 4.10s, then down the road you will wish you had 4.88s, then you will not only have to gear up again, but beef up your axle(if you havent had to replace it already.)
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4.88 with 33's on a stock 35 axle?
no.
if you dont want to get a whole new axle(d44, ford 8.8, etc) then the super 35 and the c clip eliminator would be a good option.
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Old 08-10-2010, 09:19 PM   #15
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Gotcha that clarifies it up for me. Is there any real perks to upgrading al that or would 33's with 4.10 gears gears get me where I need to go. Because I'd have a lot more flex wouldn't I?
The perk to upgrading your rear axle with a Super 35 or C-Clip Eliminator kit from Superior Axle is that you could install a rear axle with 35" tires that would increase your TJ's trail abilities nearly exponentially. But shy of that, 33" tires with 4.56 gearing and no rear locker will get you through most trails and with that combination, you could install an inexpensive front locker like a Lockrite or Aussie that would really help a lot too, and it wouldn't be nearly as expensive as upgrading the rear Dana 35c would cost. The front Dana 30 axle is up to 33" tires and a locker, the stock rear axle isn't up to a locker with any size tire.
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Old 08-11-2010, 01:45 AM   #16
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Do y'all know if the superior axles with the ox lockers are worth that money. Or is it better just to find a good used 44 out of a junk yard? For cheaper
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Old 08-11-2010, 06:04 PM   #17
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Personally I believe 4.88 is a far better ratio for 35" tires and 5-speed, I ran that combo for years and would not have been happy with 4.56. But I would not install 35" tires, especially with a 4.88, onto a stock Dana 35 as that axle just isn't strong enough for that big of a tire, especially when the axle is properly geared for it which increases the amount of torque delivered through the axle to the tires.

The only way I would run 35" tires on a Dana 35 is after installing either a Super 35 or C-Clip Eliminator kit from Superior Axle. The first kit includes a full-case locker, the second kit does not.
Do you know where I can find a good deal on those. I've been looking on quadratec but can't even find them. The one with out a locker. I might just upgrade my axle and get a Detroit locker
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Old 08-11-2010, 06:19 PM   #18
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We have run detroits in a D35 for over 15 years now with no breakage...but we don't try trails with um that would be better suited for tires larger than 33's. No way I would put a lower gear in stock axles lower than a 4.56, and most diff shops won't warranty them if you do. The pinion is super small as it is and the lower you go it gets that much smaller. The biggest problem with any drivetrain is the driver

If you wanna buy the parts I would call Jeremy at Custom Differentials 573-483-3343. He was the TTC winner last year and prolly knows more about axles than anyone online.

http://www.custom-differentials.com
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Old 08-11-2010, 06:23 PM   #19
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Do you know where I can find a good deal on those. I've been looking on quadratec but can't even find them. The one with out a locker. I might just upgrade my axle and get a Detroit locker
I keep Quadratec's catalog in my bathroom for reading entertainment but that's the last place I would order anything from unless I was desperate. Not only are their prices and shipping charges outrageous, they don't carry much of "the good stuff".

Contact my buddy Gerald at Savvy who is a dealer for Superior Axle and tell him you want his price on Superior's Dana 35 C-Clip Eliminator Kit. Or if you want one with the upgraded axle and Detroit Locker, just go with Superior's Super 35 kit which includes both. His prices are far better than anyone else I am aware of and tell him I sent you, he might kick in another discount for you. Call Gerald (a REALLY good guy) at 714-803-0909 or go to his website at Savvy Offroad and send him an email.
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Old 08-11-2010, 07:09 PM   #20
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Ha dang.. Up until now I had quadratec on speed dial. I've spent at least 2500 already thru them. Only place I could find cheaper was eBay. And at least with quad I'd pay that little extra and get the warranties. But your sure with that superior 35 I can run 35s and be fine because although I'd love to have them I'd have no problem down grading. For less troubles
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Old 08-11-2010, 07:25 PM   #21
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Yes 35" tires would not be a problem with either of those kits, just give Gerald a call and he will hook you up.

By the way, aftermarket extra-cost warranties are the very poorest return on investment thing you can buy. They are HUGE profit makers for the sellers though, profit margins for extended warranties are 90+% which is why they push them so hard. Sales people get spiffs (bonuses) for each one they can talk a buyer into.
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Old 08-11-2010, 07:26 PM   #22
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Yea iv spent a litte too much thru quadratec as well but another option I hadnt seen on here was going to a junk yard. I had a buddy that found this place down in south carolina and if you can carry it out you can have it for 50 bucks. So he got a d44 with lockers and 4.88 gears. Just a thought...
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Old 08-11-2010, 11:19 PM   #23
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Jeremy warranties them with no extra cost :P
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Old 08-13-2010, 10:17 AM   #24
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I found a front 30 with 4.88 and a rear 44 with the same on cl for 800 there both complete is that worth the money if they are mechanically good?
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Old 08-13-2010, 10:21 AM   #25
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I found a front 30 with 4.88 and a rear 44 with the same on cl for 800 there both complete is that worth the money if they are mechanically good?
That's a very good way to go if they are out of a Wrangler TJ which makes them a bolt-in job. If they're not out of a TJ, I'd pass.
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Old 08-13-2010, 11:33 AM   #26
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Correction I rechecked there both 44's. Do I even need a bigger front axle?
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Old 08-13-2010, 11:45 AM   #27
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There's only 2 ways that will be a bolt in application....either they came out of a rubicon, or someone fabbed the brackets.
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Old 08-13-2010, 11:45 AM   #28
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No, but why not...If I came from a TJ snag 'em quick .
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Old 08-13-2010, 11:53 AM   #29
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Yeah I would too....1/2 ford 44 fronts will bring 300+ here
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Old 08-13-2010, 03:25 PM   #30
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Yeah the guy said they bolt straight on, they just need lower gears. There running 373 he said. New 4.88's I'm looking about another? 350 400 front and back right

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