2X4 conversion

[Gator1957 13]

1 hour ago, jeepwm69 said:

I bet the 05-11 Foreman front diff would swap in, similar to what I did swapping the 400AT front diff into a 350 Rancher.

Awesome. I will see if my local recycler has one. I it fits, is there just a simple power on, power off switch to control it? And not switching it while moving obviously!!

 

[jeepwm69 2,644]

 

What I am NOT sure about is whether or not you'll have to have a front driveshaft modified to get the length right on the early Rubicons.  I know @shadetree had to slightly shorten a 450 front driveshaft to fit when he swapped a newer selectable front diff into an older 450.

[Gator1957 13]

That's the easy part I'm sure !! I'd be 

pleasantly surprised if the newer front diff just bolted right up

[retro 2,082]

According to the service manuals the '05-'11 Foreman have a 3.153 (41/13) front diff gear ratio so those won't work. While all of the '01-'12 Rubicons & the '02-'04 Foreman have a 3.231 (42/13) ratio. So it looks like a '04-'12 Rubi diff should work but ya might have to mod a driveshaft if lengths or splines differ from your year model.

 

There are a number of handlebar switch assemblies that will work.

[jeepwm69 2,644]

18 hours ago, retro said:

According to the service manuals the '05-'11 Foreman have a 3.153 (41/13) front diff gear ratio so those won't work. While all of the '01-'12 Rubicons & the '02-'04 Foreman have a 3.231 (42/13) ratio. So it looks like a '04-'12 Rubi diff should work but ya might have to mod a driveshaft if lengths or splines differ from your year model.

 

There are a number of handlebar switch assemblies that will work.

Parts schematics show 42/13 for the 05-11 Foreman, Rincons, 01-14 Rubicons, and and 02-04 450 Foreman.

[retro 2,082]

Thanks Jeep! If I remember right we learned that the service manuals specs are incorrect a long time ago. You posted that info once before but I'll be darned if I can find that thread now so I'll bookmark this one. 🙂