Installation

The Go 2 Twister sits between the transmission and the transfer case. It's only 5/16 inches thick so it does not significantly increase your transmission/transfer case length. One set of holes mounts it to the transfer case. The other three sets of threaded holes are for the studs that come with the kit. These studs mount the Go 2 Twister and transfer case to the transmission.

We bolted the Go 2 Twister to the Dana 300 and then inserted two of the studs into the first bolt pattern, which would give us 2" of increased ground clearance. We only used two studs since this was a test fit to see how much indexing we could do without having to cut out too much of the floor. My main goal was to raise the transfer case so that I could use a stock YJ skid plate. Position 1 allowed me to do this but just barely. Position 2 was much better but I would have to cut the transmission tunnel to provide room for the shifter mechanism. Out of curiosity, I tried position 3 -- it would require me to cut the floor to make room for the transfer case. That was beyond my comfort level so I opted for position 2. Once the indexing position was selected, we installed the other four studs into the Go 2 Twister. To be on the safe side, I tack-welded the studs in place, rather than relying on Loc-tite Red.

Because the transfer case is moved 5/16" away from the transmission, something needs to be done about the oil seal that sits in the back of the transmission. The transfer case input shaft normally slides into this seal but with the Go 2 Twister between them, the input shaft would no longer reach. To deal with this problem, the Go 2 Twister kit used to come with a different seal that displaced the seal lip further aft. However, due to different bore sizes and the fact that a longer seal wasn't always enough, Go 2 Guy Engineering is now shipping a machined sleeve that fits on the end of the transfer case input shaft. The kit that BC4x4.COM originally received contained the seal but now all Go 2 Twisters will be shipped with the sleeve and not the seal. During the course of our review, Go 2 Guy sent us the new sleeve and it worked perfectly with our TorqueFlite 999 automatic transmission. The long seal didn't provide enough reach but the sleeve was exactly what we needed. We tapped it onto the input shaft and it extended the sealing surface far enough forward that the original seal was able to reach. This sleeve should make the kit a one-size-fits-all proposition.

In order to use the stock YJ transfer case support/skid plate, I had to cut a hole in the bottom to accomodate the Dana 300.	Not exactly pretty, is it?	Here's a shot with the skid plate out of the way. As you can see, the front output hangs down a lot.
The Go 2 Twister bolts onto the transfer case. (The studs in the transfer case are about to be removed.)	For test mounting, we only used two studs. This shot also shows the seal extension adapter on the end of the Dana 300 input shaft.	Once we decided on the amount of indexing we wanted to use, all six studs were installed and tack welded from behind. You could also use Loc-tite Red which would be fine.
Quite a difference. That's a gain of 3.25" of ground clearance. As you can see, it easily clears the skid plate.	My floor pan, which I had previously "massaged" to make room for the Dana 300 in its original position, would require additional cutting. The red line indicates the proposed cut.	Here's another view of the proposed cut. This is shot from the inside of the Jeep, from the driver's side, looking into the transmission tunnel opening.
This part of the transmission was extremely close to the front driveshaft after I re-indexed the transfer case.	So, like any good rock monkey, I ground it off.

Finished Results

As you can see in the photos, the transfer case has indeed been raised enough to give me an additional 3.25" of clearance (once I change back to a stock skidplate, of course). As expected, I had to cut out some of the transmission tunnel but I was going to have to do that anyway, since I am planning on installing twin-stick shifters in the near future. Also keep in mind that the YJ's driveline is slightly off-set to the passenger-side because it was designed for use with a driver-side front output transfer case. This means that I have less room between my transmission tunnel and Dana 300 than I would if I owned a CJ which was designed for a passenger-side front output.

The kit was very complete, installation was easy and the instructions were thorough. That's icing on the cake for a low-cost way to gain up to 4.5" of ground clearance with no side-effects to your vehicle's handling.

...lars