Oxen__

i have a 89 Cherokee 4.0 5speed currently has 3.07's i believe.

i am wanting to go to a 4:10 ratio. with 33's any one know what the rmp is at 60mph with this combo?

as i am new to jeep i am having a bit of a time with the search, im not up to date on my key words yet

i have a line on some 4 cyl jeep axles from a Cherokee and i just want to make sure there a good swap and wont have me turning 3krpm on the free way.

if my guesstimate is right should put me some ware between 2200 -2500.

also if some one has the time could bestow upon me some good tag words as far as running gear. i'll use the search more

MWildmann

According to the calculator here: http://www.4lo.com/4LoCalc.htm, you will be spinning 1977 rpm at 60 mph. I thought that this number was a little low, but my hand calculation yielded the same value. I did the same swap, but i am running 31s and have an AW-4 auto. It is a great combo and i am planning on going up to 33s. I am convinced that the gearing with 33s will be acceptable for me. Hope this is helpful. As for the search keywords, i will be of no help...haven't used the search function very much...good luck.

Ianf406

I have 4.10s and with my 34x10.5s, i was getting 22/24 mpg when I drove down from MT (to louisiana)... my jeep only had 20k on it and I added alot of stuff (borla exhaust, TB spacer, K&N, bigger radiator etc.) and even now with my 35 x12s, with the 4.10s 70 is around 2000 on the highway

that being said I get alot less going up a big hill run around 3000/3500 to keep it going 70

smoothlandin

I'm on 32" tires with 4.56 gears, and I run about 2100 rpm at 65ish.

Zj heep

Go to randysringandpinon.com. they have a calculator for that.

SeriousOffroad

www.grimmjeeper.com

Oxen__

the link to the gear calc would be handy if i knew the gear ratio of my manual trans and the t-case gear ratio as well.

i shall try another search.......

MWildmann

Google "AX-15 gear ratios"...5th gear should be 0.79:1. The t-case is a 1:1 high range...

SeriousOffroad

Just select the tranny from the pulldown....

TheJerm

I'm running 3.55's with 33's, I really wish I thought ahead and got 4.10 axles during my 4x4 conversion but it wasnt in the budget.

SHANE 87

this is helpfull to me I have 31's and aw4 tranny and am planning on doing 33's

Rock Toy

AX15 5th gear ratio is .79, high range in the transfer case is 1:1, FYI low range in the transfer case is 2.72.

60x4.10x336x.79/33= 1979 rpms

If your 33s are actually 33 inches tall, most are around 32.6-32.8 inches.

Oxen__

thank you. i think that rpm would be better. i turn 1200 at 55 in 5th right now.

so looks like a axle swap is in order.

much thanks