There is no debate, go 4.88 gears (my review)

[Silvertruck]

It is because the gear teeth are thinner More teeth

Actually, its because the pinion head is smaller, with less teeth in contact with ring gear. Smaller the head, the more chance for teeth to shear off.

Sponsored

 

[Gobi Gladi8or]

488’s and 35” Falkens. RPM’s in 7th & 8th @ 71 MPH.

What is your mpg in 8th gear at 71mph out of curiosity. I am going the same set up 4:88 and 35’s

 

[Gremlinsteve]

488 gears on 35’s here. I’m getting 18.5 mpg
Mostly city

 

[Haley]

488 gears on 35’s here. I’m getting 18.5 mpg
Mostly city

Based on screen readout or hand calcs? My screen says 18.2 but hand calcs tell me 16.3.

 

[Deleted member 30519]

I just got 5.13s on my M/T and I was @ 2500rpm in 5th gear @ 70mph on my way home from LBI. Running 38" tires.

 

[itsdapk]

5.13s are best in my opinion. I hear many people with 4.88s wish they had done 5.13's . Not the other way around. If you are adding heavy accessories 5.13 will help on the acceleration side as well.

 

[Wheelin98TJ]

It is because the gear teeth are thinner More teeth

There are actually fewer teeth on the D44 5.13 ratio vs the 4.88 ratio.

D44 4.88 is 44 teeth on the ring and 9 teeth on the pinion.

D44 5.13 is 41 teeth on the ring and 8 on the pinion.

Actually, its because the pinion head is smaller, with less teeth in contact with ring gear. Smaller the head, the more chance for teeth to shear off.

Smaller pinion does not always equal less tooth contact area.

Check out the link below. Scroll to where it says "Gear size & strength info". I realize most this info is about the 9" which is a unique axle, but look at the comparative data for the D60. The D60 5.13 ratio is stronger than a D60 4.88 ratio. The 5.13 ratio has a larger tooth contact surface area.

http://www.truehi9.com/gears2.html

 

[Gremlinsteve]

Based on screen readout or hand calcs? My screen says 18.2 but hand calcs tell me 16.3.

Sorry forgot to mention it’s via the screen readout

 

[Fastwake]

Mileage mileage mileage. Buy a frickin Prius.

 

[RavensEyeOffroad]

Mileage mileage mileage. Buy a frickin Prius.

some folks arent made of money. if I can save a few bucks a week that just goes further towards other things.

 

[Fastwake]

It will take you 5 years to regain your $ in gas savings

 

[S Kama Do!]

Mileage mileage mileage. Buy a frickin Prius.

Performance performance performance, of which fuel efficiency is one aspect of. If you can't afford to mod your Jeep correctly, buy a frickin prius.

 

[The White Rabbit]

I am having mine dealership installed and covered by warranty with mopar performance gear sets when I get mine the end of this month. Will be rolling on 38" patagonias and mamba m25's ordered them last night

What’s the estimate on that?

 

[FloridaMan]

Just received a quote from a dealership in Central Florida for a 4.88 Mopar re-gear for $3,240... I have a JT rubi 8 Speed Auto. That was about ~ $1,000 more than I was expecting. Believe it or not that is supposedly with a special discount they are offering me due to a misunderstanding when I bought the Jeep (Long Story). Is that what I should expect for a re-gear now or am I being fleeced?

 

[LAGladiator]

Just received a quote from a dealership in Central Florida for a 4.88 Mopar re-gear for $3,240... I have a JT rubi 8 Speed Auto. That was about ~ $1,000 more than I was expecting. Believe it or not that is supposedly with a special discount they are offering me due to a misunderstanding when I bought the Jeep (Long Story). Is that what I should expect for a re-gear now or am I being fleeced?

W

Waaay too high.

Sponsored