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Transfer Case 246, Manual Adjustment

BigSilver

By BigSilver
in Ask A GM Technician

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BigSilver Enthusiast

BigSilver

Posted
Posted

Planning on removing the faulty encoder motor from my K2500 2003 Suburban, (transfer case model: 246), in order to manually adjust the transfer case's cam into 2Hi, from the present 4Hi setting. Don't plan on using the 4wd anytime soon, and therefore want the transfer case to focus 100% power to the rear axle. Is there a technician that may answer the following please:

 

a) The direction of rotation to the transfer case's cam, to set it into 2Hi from 4Hi; clockwise or counter-clockwise rotation?

 

b) How many degrees of rotation would be needed to achieve the desired result?

 

c) Using a socket drive, how many ft-lbs of torque could be expected, to make the adjustment ?

 

 

 

Thanks in advance.

cammiller Enthusiast

cammiller

Posted
Posted

Do you plan on leaving it out of the truck? That transfer case requires that an encoder motor be installed at all times. The shaft sits loose and if turned one way, it starts to apply pressure to the clutch plates. Perhaps if you give some more details on your problem I can direct you towards a repair.

BigSilver Enthusiast

BigSilver

Posted
  • Author
Posted
Do you plan on leaving it out of the truck? That transfer case requires that an encoder motor be installed at all times. The shaft sits loose and if turned one way, it starts to apply pressure to the clutch plates. Perhaps if you give some more details on your problem I can direct you towards a repair.

Thanks for your reply. Plan to eventually replace the encoder, temporarily hopping to manually overide it in 2Hi, since its inoperative (C0327).

cammiller Enthusiast

cammiller

Posted
Posted
Do you plan on leaving it out of the truck? That transfer case requires that an encoder motor be installed at all times. The shaft sits loose and if turned one way, it starts to apply pressure to the clutch plates. Perhaps if you give some more details on your problem I can direct you towards a repair.

Thanks for your reply. Plan to eventually replace the encoder, temporarily hopping to manually overide it in 2Hi, since its inoperative (C0327).

 

 

You only plan to replace the sensor inside the motor I hope.

BigSilver Enthusiast

BigSilver

Posted
  • Author
Posted
Do you plan on leaving it out of the truck? That transfer case requires that an encoder motor be installed at all times. The shaft sits loose and if turned one way, it starts to apply pressure to the clutch plates. Perhaps if you give some more details on your problem I can direct you towards a repair.

Thanks for your reply. Plan to eventually replace the encoder, temporarily hopping to manually overide it in 2Hi, since its inoperative (C0327).

 

 

You only plan to replace the sensor inside the motor I hope.

 

That's my intention, though it may be difficult to source just the sensor. Napa only offers the complete recon encoder, as do a couple of EBay outlets. So, I may have no other choice but to replace the entire encoder. Have you a source for the sensor?

BigSilver Enthusiast

BigSilver

Posted
  • Author
Posted
GM. I replace 2-3 of those a week. PM me with your e-mail and I will send you part numbers, and a complete replacement procedure.

 

 

Thanks BlueGorilla. You have PM.

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