97 Jeep Wrangler 4.0L 4-5gear issues - Jeep Wrangler Forum

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Old 02-08-2013, 11:00 AM   #1
Join Date: Feb 2013
Location: Norfolk Virginia
Posts: 8
97 Jeep Wrangler 4.0L 4-5gear issues

Hey Im new to jeeps and semi mechanically smart i have a 1997 jeep wrangler sport with a 4.0L 4in lift and 35in tires i have no idea what my gearing ratio is (currently deployed overseas cant check) i do have a buddy that's genna check for me though now when im on the interstate and Im in 4th i can get up to 55-60mph but never any higher i shift to 5th and it will slow down even with the peddle to the floor. Any idea whats going on? Thanks

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Old 02-08-2013, 11:06 AM   #2
03 sahara jeeper's Avatar
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Sounds to me that it needs re geared.

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Old 02-08-2013, 11:23 AM   #3
callbob's Avatar
Join Date: Jan 2013
Location: Cortez Colo
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Have to agree with re gear. I am running 35's with an auto and OD is pretty much worthless. My next plan is going with 456's but I am going to do ARB lockers when I do.
I currently have 3 73's and would guess that is what you have, but could be 3 07's that year I think.
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Old 02-08-2013, 11:24 AM   #4
Join Date: May 2012
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Yep that's what my 97 did with 3.07 gears. 5th was worthless until i re-geared to 4.56 with 33" tires.
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Old 02-08-2013, 12:32 PM   #5
Join Date: Feb 2013
Location: Norfolk Virginia
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How much will it be to regear it Im putting 33's on it hopefully that will help a bit i also put a Banks monster header and banks exhast system on it any ideas on what else to do to give it a some more power and some better mpg?
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Old 02-08-2013, 01:42 PM   #6
Knows a couple things...

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Join Date: Nov 2005
Location: Escondido, Calif.
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Your power problem isn't going to be helped by installing a crack-prone Banks header and exhaust system, such systems only help a tad at high RPMs. Regearing is what you need to do to get the power back lost from the larger tire size.

Your present gearing is either 3.07 or 3.55. For 35" tires, you want 4.88 gears and for 33" tires, 4.56 is appropriate. The cost of regearing both axles including all parts & labor depends on how well you can dicker/negotiate. Costs start at under $1100 to as high as $1500-1600 depending on the location and your negotiating skills. In other words, never accept the first price they quote you which will usually be much higher than they can actually do the job for.
When you have a choice, buy American.

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Old 02-08-2013, 03:57 PM   #7
Join Date: Feb 2013
Location: Norfolk Virginia
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Awesome thank you for the advice

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