Topic: Synchros for crawler/transfer hi/lo gears

[emsvitil]

How hard would it be to modify a crawler box or transfer case to have synchros for the hi/lo  and   the lo/hi   shift?


 

[gnob]

complete redesign of the gears and hubs.
kind of pointless.

[79coyotefrg]

complete redesign of the gears and hubs.
kind of pointless.

[BigMike]

I'm actually not quite sure if there is enough room in there for it. Syncros require a wider shift hub and there just isn't enough room. You'd have to make the gears about 20% narrower and the lower gear on the idler is already weak as it is.

I mean we just released our Xtreme Duty 4.70:1 gear set not too long ago with 42% wider teeth trying to combat the gear set's primary weak link:


I think the next problem is that the transfer case low speed gear + idler shaft has a combined inertia higher than a transmission gear pair, so you'd probably need a dual syncro setup (like a late model R-trans) in order to get any sort of shifting performance out of it.

BigMike

[emsvitil [OP]]

I did find this:

http://www.ladaworld.com/product_info.php?products_id=52



What about a synchro from just lo to hi.

You start in lo-1st, then goto hi-1st, and stay in high.


I'd rather get a dual case than change differential gears with larger tires (only have 22RE)