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Unread 07-23-2010, 12:30 AM   #1
andrew c
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33s or 35s with 4.10s? opinions please!

I just bought a 2007 2 dr x, 6 speed, with 4.10 gears. i am buying a lift and gears this weekend and i need some opinions. i am keeping the 4.10s, so should i get 33s, or 35s? i am going to be driving it from Tx to Colorado to drive trails for a week and im concerned about power and mpg with 35s. im a college student and cant waste money experimenting! opinions PLEASE!

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Unread 07-23-2010, 01:10 AM   #2
Warlord2
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You would be more happy with 33" tires if you dont regear. When I had 4.10 gears and 35's with my 6 speed manual transmission it was tolerable and fine when its flat land, but any hills/headwind/towing it became a real problem. I lasted about 5k miles before I just had to regear, everyone at the time said 4.10 and a manual would be fine. That was back in 07 before people new any better and a lot of assuming was going around. If I had more accurate info I would of stayed with 33" maaayybe 34" tires atleast untell I new what I was getting myself into.
Maybe try buying some used 32-33" tires that have maybe 1/3-1/2 tread left or something so you can time the regear and needing new tires so they will get done around the same time..
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Unread 07-23-2010, 01:15 AM   #3
MilitaryJK4455
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I run 35" tires with 3.73's and a six speed and I can easily maintain highway speeds at 18 mpg's.... With 4.10's you should be able to easily run 35's and be just fine And especially with you down there in the flat lands you would be happy with it.
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Unread 07-23-2010, 08:16 AM   #4
1398653
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dont listen to these guys telling you to get 33s. If you plan on wheeling your jeep get 35s or 34s. 4.10s with manual and 35s will be fine. You wont win any races on the street but if you wanted to win races you would have bought a honda. I have 34s on 3.21 and it is liveable on the street. Off road it is not good enough for the wheeling I do so I am going to regear but I wuold think 4.10s would be fine off road. If you change your mind it is only about 1200 bucks for a reagear. Put 100 bucks a month away for a year and regrear. You can live with it for a year if you are not happy with performance. If you get 33s you will be ticked at your self and want bigger tires. now if you dont plan on wheeling than go ahead and get the 33s.
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Unread 07-23-2010, 08:32 AM   #5
DeepSky
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^ What they said. You can always regear if you really feel you need to.
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Unread 07-23-2010, 09:21 AM   #6
MilitaryJK4455
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4.10's with an auto will almost be ideal, not just ok... The ideal set up for 35's and a standard are 4.88's and that is in the low end of the performance side just above an ideal stock setting... My 3.73's are good offroad... I rarely use 4Lo and 1st gear, I always have to run in 2nd or even 3rd sometimes... Go for 35's bro You WONT regret it!
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Unread 07-23-2010, 11:58 AM   #7
andrew c
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Thanks guys! im going to 4 wheel parts to pick up a 2.5 procomp coil, and 35 inch km2s!
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Unread 07-23-2010, 12:04 PM   #8
Dronac
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35's with 3.73's and an auto? If it's managable, I may opt for that over 33's but what would my gas mileage look like? I can handle 17-18 mpg highway, but can't really afford to drop much more then that.
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Unread 07-23-2010, 12:12 PM   #9
Crasher
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FWIW, I went with the 305X75R17 (34") MTRs from 4wheel parts. It's a compromise between 33s & 35s. With the 410s and an automatic it was ok for me. I added a superchip that guys rave about, but I didn't notice much change in performance. Keep in mind, though, that I'm not in need of a lot of power. I did regear to 513s which gave me better performance at the expense of 1 1/2-2 mpg. I wish I had kept the 410s for the economy. From this experience, I know you'll be fine with 34s and maybe ok with 35s.
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Unread 07-23-2010, 12:24 PM   #10
Dronac
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Quote:
Originally Posted by Crasher View Post
FWIW, I went with the 305X75R17 (34") MTRs from 4wheel parts. It's a compromise between 33s & 35s. With the 410s and an automatic it was ok for me. I added a superchip that guys rave about, but I didn't notice much change in performance. Keep in mind, though, that I'm not in need of a lot of power. I did regear to 513s which gave me better performance at the expense of 1 1/2-2 mpg. I wish I had kept the 410s for the economy. From this experience, I know you'll be fine with 34s and maybe ok with 35s.
What was your MPG before the regear?
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Unread 07-23-2010, 12:34 PM   #11
No4x4Yet
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Quote:
Originally Posted by Dronac View Post
What was your MPG before the regear?
Depending on gearing size and tire size you would be bringing the gearing back to factory. Larger tires have the same affect as putting shorter gears in.
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Unread 07-23-2010, 12:38 PM   #12
Imped
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I've had plenty of experience with the transmission you have, the NSG370. 4.10's and 35's isn't NEARLY as bad as most would expect due to the low gearing of the transmission itself. It's almost equivalent to 4.56 gears/35" tires and the older 5 speeds in most TJ's so you'd be fine with 35's.
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Unread 07-23-2010, 12:39 PM   #13
andrew c
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ok new question. MPG? once again im a poor college student. what could i expect from 4.10s on a speed with 35s vs. 33s?
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Unread 07-23-2010, 12:40 PM   #14
andrew c
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traffic situations(dallas), and highway hills in CO once a year?
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Unread 07-23-2010, 12:42 PM   #15
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I've got a JK 4dr/w 33" tires, before I got about 17mpg, with stock 32"

Now I get about 16mpg, with 33", it varies all over !

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33" tires , 35" tires , 4.10 gears , gear tire question , JK Wrangler , wrangler
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