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Old 03-23-2016, 01:57 AM
Thread Starter
Join Date: Mar 2016
Posts: 3
What gears should I run In my 98 TJ w/ 5 speed Trans and 33x12.50

I recently started having problems with my Dana 35 that has 3.07s in it, so now I am on the road to rebuilding the rear end and re-gearing. I am staying with the Dana 35/30 combo and going to upgrade to the Eaton Trutrac front and rear. My question is what size gears should I run. Most of the time I am driving around town with an occasional freeway trip. I am torn between 4.10s and 4.56s and leaning towards the 4.56s? Please help. I don't want the engine to be turning high rpms to run 80 on the freeway but I also don't want any problems if I go to 35s either. Let me know what you thknk.

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Old 03-23-2016, 04:56 AM   #2
Notoriously_rob's Avatar
Join Date: Jun 2012
Posts: 845
Ax15 and 4:56 is what would be recommended. I recently did the swap from 307 to 456.
Rpms Will be around 2800 at 65 to 70 miles an hour.

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Old 03-23-2016, 06:42 AM   #3
TJ 4.0's Avatar
Join Date: Mar 2015
Location: Colorado
Posts: 220
4.56 for 4.0 with 5sp and 33's. You should stay away from 35's if you plan to keep the Dana 35 axle. HTH.

Take care.

97 TJ 4"RC Xseries SL/SYE/Ford 8.8 LSD/4.88 Gears/D30/33" Duratracs

Upgrades planned/Currie Steering/Black Magic Brakes/35's
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Old 03-23-2016, 06:52 AM   #4
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Join Date: Jun 2012
Location: North Carolina
Posts: 2,186
4.56 but I would not recommend putting money in a D35.
My daily driver is a 2015 JKU on 35's 4.56 and Trutracs, My trail rig is my 1997 TJ on 35's 4.88 and Trutracs plus a pile of cash....
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