Quote:
Originally Posted by Sarek
I am in the process of replacing the transfer case to get low gearing (main issue i am having with the e53 off road). I have someone working on the adapter right now. It gives the option to run any domestic type transfer case. Like dana 300, NV1356, np205 and so on.
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What I don't get is how you're going to fool the vehicle electronics when there's no TC actuator motor to shift power front to rear. Maybe you could just leave the little motor attached hanging there and swap the case.
But a further issue is that all the TCs you mentioned are either 2WD or locked in "Part Time" 4WD, and none have particularly low, low ranges, (which is why you see doublers used). No way can you drive one of these on a dry road in 4WD. I guess you could run with DSC off when in 2WD, but I'm not sure the TC electronics would go for this. But a Full Time 4WD box might work.
Perhaps a better option would be a NV249 Full Time 4WD case from a Jeep Grand Cherokee. (I think there was an even more robust double chain FT 4WD version of this from the early Hemi Durangos as well). These use clutches/viscous coupling to distribute power, and with no electronic input at all. The only electric input is for the little dashboard pictogram that shows Low/High range. The Jeep 249 is robust enough for 300hp/350ft lbs. But the clutches will only last about 125k miles, so if you get a used one, keep this in mind; (new viscous coupling is over $900). The low range is not the lowest, but it's much lower than any of the boxes you mentioned, (in stock form). The bonus is that the car would always be in 4WD, and not confuse the DSC. If you left the X5 actuator motor attached, a TC like this might do a very similar job to the stock box in terms of playing nicely with the traction control, but it would do so mechanically. Might work, but this is all guesswork on my part.