How to tell what gear ratio's I have/Tow Package question...

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12-08-2011 | 09:37 PM

#16

Kuro89

Senior Member

Joined: Jan 2011

Posts: 905

Likes: 88

best way to find the gear ratio is to check the tags held on by the diff cover bolts, grab a wire brush and a rag cuz it will be dirty as all hell, the first three digits will be the gear ratio

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12-08-2011 | 10:30 PM

#17

Firehawk068

Senior Member

Joined: Jul 2011

Posts: 731

Likes: 3

Quote:

Originally Posted by kurek9

so i'm assuming ive got the 3.73's, but im goin to try the wheel spin thing

Make sure you put a chalk mark on BOTH wheels, and make sure they both turned the same amount.
If you have an open diff, and you slow or stop one wheel, the opposite wheel with turn faster/farther, and your ratio count will be off.

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01-01-2012 | 03:50 PM

#18

Japple650

Seasoned Member

Joined: Mar 2011

Posts: 318

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From: Lansing MI

Year: 1998

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by kurek9

Axle Gear Ratios
Jeep XJs came in several standard gearing ratios:
3.07:1, manual transmission, I6 engine.
3.54:1, automatic transmission, I6 engine with Dana 44 rear differential.
3.54:1, manual transmission, I4 diesel engine with Dana 35 rear differential.
3.55:1, automatic transmission, I6, V6 engines; manual transmission, I4 engine.
3.73:1, automatic transmission, I6, Tow Package, UpCountry Package.
4.10:1, manual transmission, V6; automatic transmission, I4 engine.
4.56:1, automatic transmission, I4, offroad or tow package.
this is off of Wikipedia, i have the tranny cooler, heavy duty radiator, and trailer hitch, and the hitch isnt a pep boys or a u haul cheappy hitch. so i'm assuming ive got the 3.73's, but im goin to try the wheel spin thing

Hmm I have a v6, auto, with the up country package but the build sheet says my gears are 3.55.

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01-01-2012 | 05:14 PM

#19

xjsnake

CF Veteran

Joined: Aug 2010

Posts: 1,150

Likes: 1

From: Nashville, TN

Year: 1997, 1993

Model: Cherokee

Engine: 4.0L

Look at the post dates, think the OP has figured it out by now...

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01-01-2012 | 06:32 PM

#20

Japple650

Seasoned Member

Joined: Mar 2011

Posts: 318

Likes: 0

From: Lansing MI

Year: 1998

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by xjsnake

Look at the post dates, think the OP has figured it out by now...

Yeah probably, I was just saying tho.wikipedia isn't always right.

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01-01-2012 | 07:47 PM

#21

PatriotGT

CF Veteran

Joined: Nov 2009

Posts: 1,438

Likes: 1

From: Dallas, GA 30157

Year: 1999

Model: Grand Cherokee

Engine: 4.0

Mine's a 99 Grand Cherokee, but going by the info I recieved from Jeep (thanks to a post somewhere on here) it came with the TP and 3:73 gears and no hitch.

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01-01-2012 | 08:44 PM

#22

Japple650

Seasoned Member

Joined: Mar 2011

Posts: 318

Likes: 0

From: Lansing MI

Year: 1998

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by PatriotGT

Mine's a 99 Grand Cherokee, but going by the info I recieved from Jeep (thanks to a post somewhere on here) it came with the TP and 3:73 gears and no hitch.

Nice. Yeah my build sheet says I have the up country package (hd suspension, tranny cooler, skid plates, tow hooks, hitch) but only 3.55 gears. What's up with that?

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01-04-2012 | 08:42 PM

#23

Tyler25

Newbie

Joined: Sep 2011

Posts: 33

Likes: 1

Year: 1994

Model: Cherokee

So correct me if I am wrong.... But I've heard that the "jackstands/chalk" method only works if you have a locker in the diff. If you have an open diff, you will need to make 2 revolutions, correct?

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