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Old 03-18-2015, 06:54 AM
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35's and atock gearing

M thinking of putting 35x12:50x16 on my 98 Tj 4.0L but don't really want to change gearing just yet and wondering how bad it will be as far as driving

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Old 03-18-2015, 06:56 AM   #2
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Ahhhhh what gears do you have now?

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Old 03-18-2015, 08:10 AM   #3
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M thinking of putting 35x12:50x16 on my 98 Tj 4.0L but don't really want to change gearing just yet and wondering how bad it will be as far as driving
the Jeep will still move down the road, if that's what you're asking. as for the performance of doing so, it will be horrible.
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Old 03-18-2015, 08:35 AM   #4
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My BIL did same thing and promptly fried his clutch trying to wheel up a steep hill. IMO those tires are too tall for stock gearing
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Old 03-18-2015, 09:42 AM
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Ahhhhh what gears do you have now?
I'm not sure what's in there now
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Old 03-18-2015, 10:15 AM   #6
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Do you have lift, axles, brakes, and steering that are up to handling 35's?
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Old 03-18-2015, 11:51 AM   #7
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I'm not sure what's in there now
Look at your differential cover bolts... There should be a small plate between two bolts and the gearing will be on that plate..... you may need a piece of sandpaper or wire whell to get some gunk off the plate to read it....
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Old 03-18-2015, 11:56 AM   #8
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What rear axle do you have?
If you are putting 35" tires on a D35, I would wait until it breaks.
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Old 03-18-2015, 12:55 PM   #9
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its doable for a while if you have 3.73 gears... I am still running 3.73s until i get my 4.88s installed. Highways arent much fun , but as far as around town it isnt too bad. gotta lug the engine though on hills
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Old 03-18-2015, 01:17 PM   #10
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I'm not sure what's in there now
You might want to get that figured out first
You will need a good amount of things upgraded to safely run 35's....
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Old 03-18-2015, 01:25 PM   #11
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After finally gearing to 4.88 from the stock 3.73 (LJ), I've come to the conclusion that regearing ought to be a sold as a package with any tire larger than stock. I absolutely despised driving my LJ with 33's\3.73. Can't really imagine trying out 35's. This is with a 42rle. Mostly kidding about the regearing\tire package.... but only mostly. :-)
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Old 03-18-2015, 02:34 PM   #12
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Gotta go with the rest of the gang, here. I drove with 35's and 3.73's for about a week before getting a slot at the gear shop. The only things that made it doable were keeping it in town and off the freeway, and having the 6-speed manual tranny so I could always find a gear/RPM that worked. Don't put off the re-gear, you're not saving yourself time, trouble or money.
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Old 03-18-2015, 02:39 PM   #13
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I've been driving with the stock 3.73's and 35's for the last six months, it's not ideal, nowhere near but I'd still rather drive my jeep than anything else. I've learned to keep it in fourth on the hwy sometimes dropping to third for hills.... Idk it's not all that bad IMO as long as it's temporary.
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Old 03-18-2015, 03:52 PM   #14
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Automatic or Manual? 3.73 with a manual not ideal by any stretch but not terrible. If its an Automatic just forget about it lol
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Old 03-18-2015, 10:04 PM
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Automatic or Manual? 3.73 with a manual not ideal by any stretch but not terrible. If its an Automatic just forget about it lol
Manual
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Old 03-20-2015, 09:00 AM   #16
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Automatic or Manual? 3.73 with a manual not ideal by any stretch but not terrible. If its an Automatic just forget about it lol
Manual
You'll be fine then, like I said it's not ideal but still drive able. Highways won't be your friend and you'll have no power in 5th gear but it's the price ya pay.
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Old 03-20-2015, 09:33 AM   #17
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I have an 2001 with 35's and 3.73's and it sucks on road and off road but I just set up an appointment to get my 4.88's and lockers installed to day. CANT WAIT.
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Old 03-20-2015, 01:53 PM   #18
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I have a 98 5spd with 33"s and stock gearing. It is not ideal but it is more than driveable. 5th gear is basically worthless, though. Getting 4.56 and lockers installed at the shop as we speak.
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Old 03-21-2015, 08:22 AM
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Look at your differential cover bolts... There should be a small plate between two bolts and the gearing will be on that plate..... you may need a piece of sandpaper or wire whell to get some gunk off the plate to read it....
no small plate anywhere. How else can I figure out what gears are in it now
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Old 03-21-2015, 08:53 AM   #20
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You can get your build sheet from jeep... it will tell you what gearing is in there....
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Old 03-21-2015, 09:08 AM   #21
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Very simple (build sheets only show what it was not always what it is)

Jack up only one tire (assuming open non locked differential) about a inch above ground .

Put blocks in front and behind at least one other tire so it won't roll.

Put transfer case in neutral.

Grab a stick of chalk and climb under.

Rotate the drive shaft (the one for the wheel you jacked up) hand rotate at differential end of driveshaft until one end of the u joint cross points straight down.

Mark end of cross pointing down and also use chalk to draw a vertical line on inner aspect of jacked up tire pointing straight down toward ground ( only on lower inside of tire not on top part)

Now rotate drive shaft at cross at differential by hand a quarter turn at a time as each side of cross points down count another quarter counting like this
1/4. 1/2. 3/4 1. 1 and 1/4 and so until call mark on tire shows 2 full tire rotations.
The count at that point is your ratio
For example if the count was just aver 4 and a half drive shaft rotations you have 455 gears if it was half way between 4 and 4 and a quarter you have 4.11 gears

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