Quote:
Originally Posted by e39_touring
None on the transmission, but the LCI ('04+ 6 speed) transfer case is electronically controled (x-drive). Your pre-LCI doesn't even have the wiring harness for this. I looked into this swap and it would be an inordinate amount of work to do. I'm in the process of doing a differential swap as I write this. Going to the 3.64 differentials will drop your RPM's by 11%.
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If the vehicle in question shares the same transfer case as I, it would be a downgrade. My transfer case is the same used in the Range Rover and is chain driven (analog). Bulletproof!
So my understanding is, replacing my diff’s with a 3.64 ratio decreases my acceleration by 11%?