1f to split 60 case

[jaydufe]

Looking to run a 1f to a split 60 tranny in my crawler I'm building . Looking for opinions pros and cons wanting g to keep it all land landcruiser no chevy s*** . Seeing if anyone else is running this setup and how do you like or dislike it .. As of now I have fj60 axels up front with longfields and a Aussie locker and a spooled rear.

 

[jaydufe]

Split 60 case and 4 speed tranny what I meant to say

 

[74fj40]

I am currently running an h42 and split case adapted to my 1f. I don't love the setup, it would significantly benefit from 4:1 gearing in the transfer case. I think low range is only 1.9:1 and first gear is only 3.55:1. So my overall ratio is not low enough to have good control on obstacles. It's a lot of clutch slipping and bouncing around.

 

[jaydufe]

my other option is a sm420 to 3spd case Been reading on that setup also . I have 40 wirha sbc 350 in it do t really want another one .

 

[White Stripe]

my other option is a sm420 to 3spd case Been reading on that setup also . I have 40 wirha sbc 350 in it do t really want another one .

Whatever you plan to run with a manual trans. you want your low gear ratio to be at least 60:1. Any higher than that and you will not have enough crawl ratio in serious spots. 100:1 is the number to shoot for.

 

[Josie'sLandCruiser]

There is a 4 to 1 low range kit available for the split t-case (from Advance Adapters, I believe.)

Using a H41 four speed instead of the H42 will help with the crawl ratio (4.9 first gear vs. 3.55)

-Alan

 

[too tall]

Sm 420 or 465 to one piece case would hold up if you get a t-case saver and a ring for the front output. I have been beating on a one piece case for years. This last one I have in my rig is holding up really well. I used to break them all the time. Having a 7-1 first gear is better than a split case with gears in it for wheeling. What axle gear ratio are you planning? Tire size?