Need to crack open a Toybox and mini-truck t-case

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Aug 11, 2002
Elkhart, Indiana
So the new Bugly (Butt Ugly Buggy) came with an SM420 connected to a Toybox and the original FJ40 case but the rear axle (GM 14 bolt) has a centered diff. This means the rear driveshaft runs at a goofy angle. That's the bad news.

The good news is that Bugly came with the proper shafts and gears from Marlin, as well as a mini-truck t-case, Budbuilt skid plates, etc to make it right.

I've never cracked open a mini-truck case or Toybox. Before I launch into this and fu*k something up- what literature should I have? Instructions available on the web? Step by step process somewhere here on mud?


There's several places on the web now to download FSMs, highly recommended. The other option is the VERY detailed Crawler gear install instructions document from Marlin's website, lots of good photos.

4.70:1 Gear Install | Marlin Crawler, Inc.

If I can take apart a mini transfer case, rebuild it, and put it back together ... anybody can. It's very easy and straight forward.

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