Diff ratio’s - JeepForum.com

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post #1 of 5 Old 09-23-2009, 03:20 PM Thread Starter
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1997 ZJ 
Join Date: Jul 2008
Location: naperville IL
Posts: 84
Diff ratio’s

I know this is a really stupid question to many of you but how do I find out what gears I have in my rear diff to see if that mach the front axle I have brought.

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post #2 of 5 Old 09-23-2009, 03:29 PM
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1993 ZJ 
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There should be a tag on the diff saying if it has 3.55 or 3.73. What engine do oyu have and do you have a factory tow package. You also could request a build sheet from Chrysler. It is located in the F&Q section.

99 WJ Ltd, Blacked out, 4.7L, 242j Swap, 2'' BB, 245/75/16 Kuhmo Venture AT KL78, Flow Master Super 40, MagnaFlow high flow Cat, Akebono caliper upgrade, Addco rear swaybar, Westin brush guard, Moog Super Trail Boss, Rancho RS5000, Rola roof rack with dual kayak J hooks, PAC-AOEM-CHR, Sony Xplod 1200w amp, 2 Sony Xplod 12'' subs, 118,XXX miles (SOLD)
93 ZJ Ltd, Blacked out, 5.2L, Reman 46RH, Reman 242 Swap, 3.5'' IRO + 2" BB, 33x12.50r15 Mud Claw MTX radials, Bushwacker Flares, 216,XXX miles (Still parked in NC)
04 F-350 SD Crew Cab FX4 Lariat, 6.0 PSD SRW, Head studs, AFE Stage 2 SI Pro Guard 7 intake, Blue Spring mod, 150,XXX Miles

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post #3 of 5 Old 09-23-2009, 03:39 PM
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2004 WJ 
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Location: Boulder
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Open up the diff cover and look on the ring gear for some numbers stamped into it. It'll list the gear ratio and/or the number of ring/pinion teeth. Ring Teeth / Pinion Teeth = gear ratio.

'04 WJ, 6" Clayton LA's, 242 SYE, 35" BFG MT KM2's, 4.56 gears, & D44a locked
'14 WK2 Limited w/5.7L, ORAI, & Tow Package
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post #4 of 5 Old 09-23-2009, 03:41 PM Thread Starter
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i have the 4.0 with the tow package and thankyou for that i will go look in a sec
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post #5 of 5 Old 09-23-2009, 03:54 PM Thread Starter
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1997 ZJ 
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its has 3. 73's wich is lucky becouse thats what i brought today. i'm finley going with the 2wd to 4wd convershion
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