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Unread 05-29-2001, 09:59 PM   #1
mike byrd
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Join Date: May 2001
Location: Wappingers Falls, NY
Posts: 7
piss poor power

I have a '90 YJ with the 999 automatic in it. Because of the crummy gear ratio I don't have power worth a crap (motor is fine....) any CHEAP ideas to get the ratio down to something I can live with?

'90 YJ, 4.2 liter, 4"Pro Comp Lift, lookin for other goodies.
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Unread 05-30-2001, 12:47 AM   #2
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1995 YJ Wrangler 
Join Date: Nov 2000
Location: Santee, CA U.S.A.
Posts: 1,148
There's only one way to change the ratio in 2 high, which is what I assume you're talking about. If not, then a 4:1 kit for your tcase will do the trick for around $1000. If the problem is on the road, then the only thing you can do, aside from a different tranny, is re-gear the axles. That'll run ya about $250 an axle in parts. I think labor will run about the same.

I almost forgot. You could run smaller tires!
Matt Osburn
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Unread 05-30-2001, 12:54 AM   #3
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Join Date: Mar 2001
Location: Michigan
Posts: 471
Has it always had lack of power? My 4.2 yj had a plugged converter and it just kept losing power over time. I had no idea that the converter was the problem until I had to get out the tow strap to get home one day.
89' YJ - 4.2 - NV4500 - NP231w/sye - 1" Body Lift - 2 1/2" Rancho Suspension Lift - 31" Firestone MTR - AR Outlaw II - Tomken Bumpers F & R - Warn 8000 front - Warn 6000 rec. mount rear - FlowFit Seats - Tom Woods Rear & Custom 2" front driveshafts
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Unread 05-30-2001, 05:36 AM   #4
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Join Date: May 2001
Location: Sacramento
Posts: 11
I'm running 35"s with a 4.56 gear ratio, and the engine runs slightly higher than stock
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