how do i tell what my stock gear ratio is....its a 90 with 3.0 and 5sp....4:10s ?

 

This will show you that you have a R150F transmission and a VF1A transfer-case.http://www.4x4wire.com/toyota/faq/parts/

Your transfer-case has 2:57 low range gears, you transmission gears are stated here.http://en.wikipedia.org/wiki/Toyota_R_transmission
This one too, it has the reverse gear ratiohttp://www.geocities.com/MotorCity/P...Gearboxes.html

Use this to be sure of your ring & pinion gear ratio, 4:10's or other.http://toyota.off-road.com/toyota/ar....jsp?id=274535

 

look at the door panel in your truck and check here
http://www.brian894x4.com/Gearratiosanddiffs.html

 

i bet there 4:10s

 

I'll not take that bet, how about a bet as to whether the code is G292 or G294? Mine is G292 even with the 4-pinion diff.(should be G294).

 

If it came with 31's, it would have 4.56's

 

You could always jack up your rear end and spin the tire counting how many times the d-shaft rotates (or visa-versa). There are several threads with people asking how to do this.