Are 4.10s sufficient?

[Canjeeper]

The good ones require a few warm up / cool down drives . with monitoring . Before they send you on your long trip home .

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[aldo98229]

Do shops who are charging much less labour really know what they are doing in regard to re gears?

A shop that claims they are regear kings tell me 12 hours labour

Northridge 4x4 regeared my Sahara to 4.88 last March: I dropped off the Jeep at 9am and picked it up at 3pm all ready to go. It had already been reprogrammed and road tested.

They had pre-ordered all the parts over the prior weeks and were ready to go when I showed up.

 

[Aquastream]

Northridge 4x4 regeared my Sahara to 4.88 last March: I dropped off the Jeep at 9am and picked it up at 3pm all ready to go. It had already been reprogrammed and road tested.

They had pre-ordered all the parts over the prior weeks and were ready to go when I showed up.

How do you like the 4.88s?

 

[jhackathorne]

Northridge 4x4 regeared my Sahara to 4.88 last March: I dropped off the Jeep at 9am and picked it up at 3pm all ready to go. It had already been reprogrammed and road tested.

They had pre-ordered all the parts over the prior weeks and were ready to go when I showed up.

I paid $1800ish 2 years ago when I regeared my JK with @Northridge4x4. Sadly they closed the Denver location during the pandemic. I still use them for parts, but not service on things like that. It did not take them 12 hours to mine.

I was running 3.21 and went to 4.56 on 34's on that Jeep and it wa a massive difference. I could actually get up and move. BUT, I am on 4.10's now in the JL and will be swapping to 35's in the next week or so and do not plan on regearing. The 8 Spd trans. makes a massive difference. Granted my 35's and 37's weigh the same. Also, I am running a Pulsar XT Tuner to help.

 

[aldo98229]

How do you like the 4.88s?

Kicks ass from a standing stop and around town; feels very good in 4-Lo. The automatic downshifts right away and with confidence when passing on two-lane roads.

On the other hand, the Jeep feels a little “overgeared” on the freeway: my fuel economy drops precipitously above 65 MPH to 15 MPG.

Overall I like it a lot!

 

[Jtclayton612]

Kicks ass from a standing stop and around town; feels very good in 4-Lo. The automatic downshifts right away and with confidence when passing on two-lane roads.

On the other hand, the Jeep feels a little “overgeared” on the freeway: my fuel economy drops precipitously above 65 MPH to 15 MPG.

Overall I like it a lot!

I’m on 3.45s and did a trip going mostly 75-80mph and was mostly hitting 12-13mpg so you’re doing much better than me lol.

 

[aldo98229]

I’m on 3.45s and did a trip going mostly 75-80mph and was mostly hitting 12-13mpg so you’re doing much better than me lol.

Yes, that's what I used to get before regearing!

And the automatic refused to shift past 6th speed.

The sweet spot for 35s appears to be 4.56. But I ain't complaining.

 

[Aquastream]

I’m on 3.45s and did a trip going mostly 75-80mph and was mostly hitting 12-13mpg so you’re doing much better than me lol.

35s?

 

[Aquastream]

Yes, that's what I used to get before regearing!

And the automatic refused to shift past 6th speed.

The sweet spot for 35s appears to be 4.56. But I ain't complaining.

When you say it feels over geared are you referring to the MPG or does it feel like the jeep needs another gear on the highway and the RPMs are too high?

 

[Aquastream]

I’m on 3.45s and did a trip going mostly 75-80mph and was mostly hitting 12-13mpg so you’re doing much better than me lol.

My fuel mileage is terrible right now on the 3.45s with 315/70 tires. I looked this morning and it’s 17L/100km average

 

[Steph1]

I’m on 3.45s and did a trip going mostly 75-80mph and was mostly hitting 12-13mpg so you’re doing much better than me lol.

Totally understandable. I drove around a few months with 35s and 3.45s while waiting for parts to show-up for my regear to 4.56 and I remember the feeling of that set-up. I had a flash back towards the end of the summer, where I relived exactly that same feeling of 35s on 3.45s. I was towing a trailer with a one ton load of river rocks. No kidding!

 

[Jtclayton612]

Totally understandable. I drove around a few months with 35s and 3.45s while waiting for parts to show-up for my regear to 4.56 and I remember the feeling of that set-up. I had a flash back towards the end of the summer, where I relived excatly that same feeling of 35s on 3.45s. I was towing a trailer with 2 tons of river rocks. No kidding!

Yeah I’m not putting any money into these axles, saving up to change out to rubicon axles and I’ll regear then if I can’t just get the 4.56/4.88 housings and gears and throw some shafts in.

 

[aldo98229]

When you say it feels over geared are you referring to the MPG or does it feel like the jeep needs another gear on the highway and the RPMs are too high?

The MPG.

The Jeep sustains speeds without issue and the automatic transmission uses the full range of speeds.

 

[Aquastream]

The MPG.

The Jeep sustains speeds without issue and the automatic transmission uses the full range of speeds.

Excellent

Do you think 4.56s would’ve been better? Maybe you would lose mid to bottom range ease with 4.56s though huh?

 

[GrayWolf.Overland]

If there were 4.30 gears that's the apt one for 35s on JLs. Since that's not a common gear 4.56 is the nearest sweet spot for 35s.

I run 4.56 Nitro gears, on KO2 35s (c-rated f150 raptor tyres). 2" lift
Around town I clock about 16.5 to 17mpg. Highway long drives - 19-19.5ishmpg

My post re-gear thoughts: https://www.jlwranglerforums.com/fo...pressor-looking-for-advice.87054/post-1882079

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