Swapping gears in the t86

Hello folks. My jeep is geared so tight it only goes 50 mph with the 225. I was wondering if there was a way I could swap the 3rd gear that has a 1:1 ratio for something even smaller like 0.8:1 (not sure if that actually is one im just trying to give an example) has anybody done this sort of thing before? Or atleast have any ideas? Thanks guys

 

Add a warn or saturn overdrive. The transmission doesn't have a 3rd gear to remove as it locks the input and output together

 

Thanks! That's actually extremely helpful!

 

The 225V6 with the T86 will run down the hiway 85-90 all day with 3:73 gears. What ratio is the rear-end/front-end. That is what is slowing you down.

 

I've got the 4.88 gears but I'm content with the power they bring. I realize changing them would give me the speed, but I was hoping I could do it with those still in

 

I haven't had anybody follow me but I've looked up the speed calculators for the dauntless motor. They all say that the max speed with my gears would be about 52

 

Tall tires and 4.88s should be fine for highway speeds. I recall a friend in the day that would run the aviation rib tires (33s?) and 4.88s ('71 225) on the SoCal freeways in the day and drive highway speeds just fine.

Try the Novak gearing calculator. http://www.novak-adapt.com/knowledge/gearing.htm Your transmission's final drive ratio is 1.0. 3000 RPM is not an unreasonable cruising speed for a healthy 225.

Maybe you are unaccustomed to the amount of gear and road noise that you have in a Jeep.

 

I only have 31'

 

Oh and I used 2900 rpm for calculations

 

Even that calculator only said 57 mph at 3000 rpm. Any faster rpm for prolonged amounts of time risks damaging the engine severely!