go to jeeptech.com this is THE BEST site I've found for all of my specification ?'s
I4 Automatic - 3.73:1I4 Standard - 4.10:1I6 Automatic - 3.54:1 (normally)I6 Standard - 3.07:1, 3.54:1 or 3.73:1 - must verify with the tag on the axle or by pulling the differential cover and reading the numbers stamped in the ring gear or by counting revolutions of wheel versus driveshaft.http://www.jeepforum.com/forum/f12/yj-wrangler-stock-specs-563403/
The stock rear-end gear ratio for all US 240sx is 4.083
So what is the question about your 1991 Wrangler horn?
I believe that is 2.73 ( axle code " M " )
.035 gap standard and stock
The 1991 Wrangler had 15 inch wheels, the bolt pattern was 5X4.5
75w90 gear oil75w90 gear oil
Not exactly. The body styles are different. A 1991 Jeep Wrangler is a YJ as a 1999 is a TJ. t
A 1991 Jeep Wrangler uses DOT 3 brake fluid.
no
32:1 is standard fuel mixture for 2 stroke engines, you can use different ratios but this is the reccomended ratio by the manufacturer.
No, they are a different bolt pattern.