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Old 08-31-2009, 11:40 PM   #41 (permalink)
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Pasta - '96 Volkswagen Passat TDi
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Quote:
Originally Posted by droptail View Post
Trying to follow. Which end of the truck are you doing this mount, up front? And which direction are you driving, front axle or rear transfer case?
I'm speaking about removing the rear driveshaft and mounting the e-motor inline with it. You'll be driving the rear axle with both the gas engine and the e-motor, or just one or just the other, depending which way you want to run at a given point in time.

If you were to mount it as an input to the xfer case from the front axle's output, without it driving the front axle, you'd get nowhere, unless you're in 4wd Hi or Lo, which presents it's own particular set of problems, specifically the inability to shift on the fly (back into 2wd mode), the inability to exceed 45 MPH (not recommended in 4wd Hi, either), and the specifically shorter gear ratios assigned when in any 4wd mode.

Your e-motor would need to spin at a speed inverse to the output speed of the transfer case for a given vehicle speed in order to get you moving anywhere, and you'd still be doing it rather inefficiently.

Frankly, your truck doesn't make enough torque (as mentioned before) to worry about twisting the armatures of even smaller motors, so mounting it in line w/ the rear drive shaft is probably going to be the best feasible option for you, all things considered.

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