hypothetical dual 2.28 transfer case question

[bryan89]

So,
suppose you had dual cases setup both with 2.28 gears, and a twin stick rear case. obvisouly, you would have Hi-Hi, Hi-Lo, Lo-Hi, and Lo-Lo capabilities...
BUT!.... Hi-Lo and Lo-Hi (2 or 4wd) would give you the same final drive ratio.
(assuming you didnt change ring and pinion ratios between testing)

my question is, which setup would be harder on the truck in terms of stress? putting the front case in low and the rear in hi, or the rear case in low and the front case in high?

seems like since the rear case is obviously further from the source of torque (engine) that it would see more stress being in low rather than having the front case in low and the rear case passing through 1:1.

sound right? or is my brain convincing itself of something thats not there

 

[CreeperSleeper]

Personally, I would run the rear case in L in the situation you are describing. The reason would be multiplied tq going into the second case. Let's say your motor has 100 ft lbs of tq. If you are in L with the front case, the rear case is seeing around 228 ft lbs of tq. (Obviously there is a lot more to it than that but that should give you an idea of what I'm saying.)

 

[80t0ylc]

Here's an interesting read for dual transfer cases

Edit: After reading, it sounds like to me, it's the rest of your drive train, downstream of the xfer cases, that you need to be concerned about. Be sure to click on the "View Full Version" link to get some idea of what Charles was saying. Don't know why he edited his posts, but he sounded knowledgeable, from the the other posters that quoted his posts near the end of the thread.

 

[fjfodee]

I had duals in my mini several years back (2.28-4.7). Ran 2wd 2.28 a lot going from trail head to trail head, mostly at 25 mph and under. Never had any problem with it. I don't think you would have any problem with running dual 2.28's. I believe the torque problem comes in if you put the 4.7's in the front case when running duals (which is not recommended by Marlin, etc).

 

[bryan89]

while i agree it shouldnt be a problem, but hypothetically one way has to be worse than the other right?

i guess it comes down to one way puts more torque on the front half of the drive train, and the other puts more torque on the rear half of the drive train.

so it comes down to which is weaker....probably the rear half right?