How do i tell what gear ratio my rear axle is its a 1992 i6 5sp manual is 3:54 or 3:73 3:07 or how can i look

 

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

 

If you're not sure if its got original gears, there's the easy way:
Lift one rear wheel off the ground with trans in N (t-case in 2H) and spin tire 1 rotation while counting rotations of driveshaft.
Or the right way:
Pull the diff cover and count the teeth on both the ring gear and the pinion and divide the two to get you true ratio.

 

Stock gears have the tooth count for both the ring and pinion stamped on the ring gear.

 

Never noticed. Good to know, thanks!