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I know that the the Touareg shared the same transfer case at the Cayenne (NV235).
I know that through NV's own documentation the NV235 shows 2 torque split ratios 38/62 and 47/35.
http://www.rsgear.com/articles/2004_09.pdf
I know that through the use of the gearing we can mechanically change the torque split to create a bias.
I know that the NV235 transfer case uses an electronically controlled clutch to lock the center differential and/or partially lock the center differential.
The NV235 is the same p/n for both the cayenne and the Touareg so the 2 different torque biases are done with the exact same transfer case.
My question is how?
I have read that mechanically the transfer case is geared for 38/62 torque split so if the clutch is not engaged or didn't exist or was unplugged you would get an open differential with 38/62 torque split (assuming all wheels have equal traction).
I have also read that the Touareg accomplishes the 47/53 split by partially applying pressure to the clutch at all times during normal driving and that this also creates premature wear on the clutches.
I haven't seem any complaints about clutch wear out in these transfer cases, which makes me wonder if this is true?
If the torque split is mechanically 38/62 and if we lock the center differential clutch that would make it 50/50.
I guess partially engaging the clutch would start to move more torque from the rear to the front as it partially starts moving towards a full lock which when fully locked would make it 50/50. So as the clutches tighten the 62 rear bias starts to drop down and the front bias starts to rise up.
So in reality the most torque that can be transferred to the rear wheels if all wheels have traction is 62% to the rear if the clutch was fully unlocked to 50% if the clutch was fully locked. Of course that changes if there is wheel slip.
But if this were true the center clutch would have to essentially be locked to make a 50/50 bias which meas it would be locked all the time even in normal driving which we know it isn't.
So I am wondering if Touareg's really are biased 47/53 but they've got to be somehow because even NV own specs start 38/62 and 47/53 bias.
I want to think maybe the Toureg's version of the NV235 had different gearing than Cayenne's version that makes the most sense but it seemed when I quickly researched it that the transfer case was exactly the same but maybe that's not the case.
Curious if anybody has information or links that might be helpful in figuring this out.
Thanks
I know that through NV's own documentation the NV235 shows 2 torque split ratios 38/62 and 47/35.
http://www.rsgear.com/articles/2004_09.pdf
I know that through the use of the gearing we can mechanically change the torque split to create a bias.
I know that the NV235 transfer case uses an electronically controlled clutch to lock the center differential and/or partially lock the center differential.
The NV235 is the same p/n for both the cayenne and the Touareg so the 2 different torque biases are done with the exact same transfer case.
My question is how?
I have read that mechanically the transfer case is geared for 38/62 torque split so if the clutch is not engaged or didn't exist or was unplugged you would get an open differential with 38/62 torque split (assuming all wheels have equal traction).
I have also read that the Touareg accomplishes the 47/53 split by partially applying pressure to the clutch at all times during normal driving and that this also creates premature wear on the clutches.
I haven't seem any complaints about clutch wear out in these transfer cases, which makes me wonder if this is true?
If the torque split is mechanically 38/62 and if we lock the center differential clutch that would make it 50/50.
I guess partially engaging the clutch would start to move more torque from the rear to the front as it partially starts moving towards a full lock which when fully locked would make it 50/50. So as the clutches tighten the 62 rear bias starts to drop down and the front bias starts to rise up.
So in reality the most torque that can be transferred to the rear wheels if all wheels have traction is 62% to the rear if the clutch was fully unlocked to 50% if the clutch was fully locked. Of course that changes if there is wheel slip.
But if this were true the center clutch would have to essentially be locked to make a 50/50 bias which meas it would be locked all the time even in normal driving which we know it isn't.
So I am wondering if Touareg's really are biased 47/53 but they've got to be somehow because even NV own specs start 38/62 and 47/53 bias.
I want to think maybe the Toureg's version of the NV235 had different gearing than Cayenne's version that makes the most sense but it seemed when I quickly researched it that the transfer case was exactly the same but maybe that's not the case.
Curious if anybody has information or links that might be helpful in figuring this out.
Thanks
