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Old 04-08-2015, 10:19 AM
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What to expect after regearing?

I am regearing my automatic yj with 32s and a 3 inch lift from 3.73 to 4.10s.... What will be the most noticeable difference? Climbing hills, off the line acceleration, power, all of the above?? I know probably an elementary question, Just curious, thanks!

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Old 04-08-2015, 11:19 AM   #2
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Moving from 3.73 to 4.10 isn't that big of a jump in gears to actually "feel" a noticeable difference. You might pick up a hair more performance all around, but it isn't going to be very noticeable. You aren't going to get a "seat of the pants" feel.

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Old 04-08-2015, 12:03 PM
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Yea having an 8.8 installed with 4.10s and also rebuilding the front dana30 w a 1 piece ... Hopefully I will notice something!
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Old 04-08-2015, 02:53 PM   #4
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I am regearing my automatic yj with 32s and a 3 inch lift from 3.73 to 4.10s.... What will be the most noticeable difference? Climbing hills, off the line acceleration, power, all of the above?? I know probably an elementary question, Just curious, thanks!
3.73 stock axle?
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Old 04-08-2015, 04:57 PM   #5
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You will notice a little better acceleration , a little better hill climbing and higher rpm. I just went the exact opposite trying to help my top end. I have to take the highway to get to some lakes I like to go to.
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Old 04-08-2015, 07:23 PM   #6
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I have 4:10's with a 2.5 (4)cyl.... running 31's...
On the hwy I can run 60-65 in 5th if the road's flat... any hills or wind and you need to move down to 4th...
I agree the gear change is pretty minor
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Old 04-08-2015, 08:40 PM
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I'm sorry, I am going from 3.55 to 4.10 not from 3.73,, I'm a dummy! Good catch! More noticeable change I take it? Anyone with experience with a jump like this? Thanks again
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Old 04-09-2015, 02:01 PM   #8
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I'm sorry, I am going from 3.55 to 4.10 not from 3.73,, I'm a dummy! Good catch! More noticeable change I take it? Anyone with experience with a jump like this? Thanks again
minimal.but worth it
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Old 04-09-2015, 03:43 PM   #9
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I switched from 3.73 to 4.10 i have a 34.6 inch tire, 4.10s feel good actually my 3.73 did not feel to slugish
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Old 04-09-2015, 05:39 PM   #10
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had 4.10 in my 95 auto 6cly had 3.07's prior I think.. ran 33's..bit quicker.. did fine on the trails... 4.10s and the auto is fine.. 4.56 would be screaming on the highway...
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Old 04-10-2015, 05:52 AM   #11
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I went from 3.07 to 4.10 in my 4.0L with 33's. Huge difference. Off-roading requires much less work with the clutch now, and highway performance is better. I can take any of the small hills without having to downshift from 5th. It runs around 2400 rpm at 70.
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Old 04-10-2015, 11:48 AM   #12
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i went from 4.10s to 4.88s with the 2.5l, ax-5, and 33's huge difference! its like a totally different jeep. i can use 5th gear just fine, i can even make it up most hills in 5th without losing too much speed. it was well worth the money in my opinion.
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Old 04-10-2015, 03:18 PM   #13
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i went from 4.10s to 4.88s with the 2.5l, ax-5, and 33's huge difference! its like a totally different jeep. i can use 5th gear just fine, i can even make it up most hills in 5th without losing too much speed. it was well worth the money in my opinion.
Did you go straight from stock tires to 33s?
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Old 04-10-2015, 10:12 PM
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I'm just looking for more hill climbing capability ! On and off road
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Old 04-11-2015, 10:32 AM   #15
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I'm just looking for more hill climbing capability ! On and off road
4.10 sufficient. .but if you plan on upgrading tire 4.56
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Old 04-11-2015, 10:56 AM   #16
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If he is looking for better (offroad/ 4-LO) hill climbing capability, wouldn't a new transfer case (4:1) be a better option?
I'm considering swapping the 3:7 in my JK to a 4:1 (Rubicon case) for the same reason.
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Old 04-11-2015, 11:11 AM   #17
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Most dramatic thing you will notice is a higher rpm cruising. Maybe a bit noisier at that higher rpm. And you should notice a bit better lift starting out plus it will shift out of first sooner.

But power/acceleration/climbing? No real change that you will feel.
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Old 04-11-2015, 11:11 AM   #18
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He should get better hill climbing with the lower gearing. Swapped out my 3.73 to 4.88 the other day an notice an increase in power on uphills.
A little more zippy off the starts. Or as zippy as a 3.8L engine gets. Runs about 700 rpm higher on the highway in OD. But getting ready to go from 33" to 35" tires this week so it should bring it back to stock RPMs on the power curve for an auto JK. I would imagine the OP would have the same results with a gear swap on his YJ.
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Old 04-11-2015, 12:35 PM   #19
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Did you go straight from stock tires to 33s?
i actually had 31's on stock gears for about 8 years when i made the change. huge difference. the 33s with 4.88s drive way better than the 31s with 4.10s ever did.
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Old 04-13-2015, 04:32 PM
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Installed and rolling!! Climbed a few mountain passes on my way home and there was a major difference ... Cruised up and even passed people. before I couldn't reach 40 mph climbing these mountains and today felt like a racecar in comparison. Also noticed that the Rpms stay high from one gear to the next, before it felt like a huge gap, this keeps speed and acceleration more consistent ,,, thanks for help, just thought I'd give an update! Disc brakes also a nice bonus
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Old 04-14-2015, 12:07 AM   #21
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Nope sorry. Changing the rear end ratio does not change the rpm drop between gears. That is done with wide ratio vs close ratio transmissions.

The speed changes between gears but not the rpms.
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Old 04-14-2015, 11:56 AM
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Ah

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