89silverpu

So I have been looking into getting 4.7 gears to put in my t-case, but while looking at Marlin's website, I saw that they had crawler boxes ready to put in between the tranny and the t-case for dual cases. I have two questions:

1. Does having dual 2.28 cases give you an overall t-case gear ratio of ~5.2:1 in double low? or what is it??

2. How much is it to get the drive shaft modified/shortened?

Thanks!

AxleIke

1. Yes it does.

2. Shafts. Both need to be done. Mine were about 250 out the door, but I had them retubed, since the stock ones are paper thin. That was from a local shop. Call around and see what people can do for you.

tc

x2 for AxleIke's post

jmazoso

When I did mine the shafts changed by about 4.5 inches.
I love having the dual cases. You endup with three forward speeds
1:1, 1:2.28, and 1:5.2 plus you get a 1:2.28 in 2wd
If you need more gear, you can always change the rear case to 4.7
gears in the future, and have 4 forward gears.

AxleIke

4 forward gears is the bomb.

I run 2.28 for snow, and easy fire roads. I run 4.7 on the difficult trails, in between the obstacles. and I run 10.7 on the obstacles. Having choices is good.

89silverpu

Thanks! I'm assuming a new crossmember would be in order as well? A budbuilt for instance...?

64-Hurricane

You are correct sir. New X member, floor board modification, top shift. etc..

89silverpu

Thanks! I'm assuming a new crossmember would be in order as well? A budbuilt for instance...?

tc

You can run the stock crossmember, but that's a lot of torque on the one tranny mount. A dual-case crossmember (like Budbuilt) with 2 tranny mounts or the FROR crossmember are highly recommended.

If you go with a clocked adapter, you have to use the FROR crossmember to realize the ground clearance savings.

89silverpu

Thanks! Good to know, I was wanting to get a Budbuilt anyways for added ground clearance because the stock crossmember is like a plow lol

Would I have to do anything to my stock t-case? Would I just put the crawl box in between the t-case and tranny and go from there?

tc

I don't know - mine was already assembled. I think there's an instruction sheet on the marlin website.

AxleIke

Unless you are putting in a twin stick, no. Just make sure you have the correct splines on your adapter. You likely have a 21 spline inupt, so get a 21 spline adapter.