Re: tc gear swap


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Posted by Clint Dixon [65.125.107.130] on Wednesday, October 20, 2010 at 13:04:51 :

In Reply to: Re: tc gear swap posted by clueless [201.202.22.114] on Tuesday, October 19, 2010 at 21:06:08 :

I think Chris was kidding about mounting the transfer case backwards. Did you see his smilie face after his post?

Unless I am missing something, I see no way that mounting a NP200 transfer case backwards could ever work.

1) The original output shaft that connects to the rear driveshaft would now become the new input shaft.

2) The original output shaft to the rear, the original output shaft to the front, and the original output shaft to the brake drum always turn the same speed as one onother whether the case is in low range or direct (high range) because they are internally always locked together with meshing gear teeth when the transfer case is engaged in the 4x4 position. Unengaged, only the original front output shaft can rotate freely. The original output shaft to the rear and the original output shaft to the brake drum still remain connected at all times.

3) With that in mind, the new input (old output to rear), new output to brake (old output to front), and new output to front (old output to brake) would always be turning the same speed when the case is engaged.

4) Only the new output to the rear (old input to case) would be allowed to turn faster than the input shaft (OD) when the case was shifted into low range. The new output to the front axle would still be turning slow (always same speed as the new input) so the four wheel drive could not be used in the newly created OD situation. Freewheel hubs would always have to be used, and disengaged, while using the new OD situation (or front driveshaft removed).

5) Low range would be nonexistant.

6) The fake neutral that exists in the transfer case when the high-to-low range gear is moved to the central position in between the detents, would become a big concern. If this position was mistakenly selected, the rear output would become disengaged and all of the diveing force would be directed to the front axle.

7) 2WD would be nonexistant without using freewheeling hubs. However, the driveshaft to the front axle would always be turning and continuing to wear anyway.

I think excessive noise would be the least of your concerns.

Junior



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