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The Trail Tough Rock Block by Bill Johnston
Trail Tough has just started shipping their new 'Rock Block', an intermediate gear reduction box that replaces the short drive shaft between the transmission and the transfer case. This installation took a couple of hours to do, but that included straightening a couple bashed parts and stopping to take pictures, so 'your mileage may vary'. |
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  The
Rock Block comes with a unique cross member that replace the regular rear
transmission mount and makes the room needed to mount the new reduction
box. It holds the transmission and the Rock Block with 'captured' rubber
mounts that absorb vibrations like the stock tranny mount. The mounting
yoke in the top-right of the photo on the right will be mounted to the
transmission where the old mount normally would be. |
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  We
started by removing the intermediate drive shaft (jack shaft) and the
stock rear transmission mount. |
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  Next
we removed the front mount for the long transfer case arm. Taking a closer
look at the condition of the crossmember showed that it had seen its share
of rock bashing. This had deformed the 'channel' that will be used to
cradle the new crossmember. We had to straighten this piece out with the
help of 'Mr. Sledge' and a good pair of vicegrips. |
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  Here
you can see how the new crossmember fits nicely into the newly reformed
channel in the old crossmember. In the picture on the left, you can see
the mounting holes for the passenger side of the crossmember. The hole on
the right is where the front mount for the transfer case goes. We
temporarily replaced the rubber mount to secure the new crossmember while
we prepared to drill the new mounting bolt holes. |
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03/14/2017
