Transfer Case Shift Problem NP263HDJuly 8, 2014 - Author: bartbarton - No Comments
I have a 2006 Chevrolet 3/4 ton heavy duty 4WD pickup
Question: While the truck is in motion, when I shift electronically from 2wd to 4wd the shift isn’t smooth and it sounds like gears grinding, but it will shift into 4wd. Shifting back into 2wd is fine (makes sense). I suspect the problem is with the transfer case. I would appreciate any information from your experience what could cause this problem?
Answer: A few different problems can cause this to happen. It could be just a worn mode syncro (inner) #701-1D , if that’s the case you need part number 401701-1 your cost $33.93. And mode syncro (middle) #701-3D , if that’s the case you need part number 401701-1 your cost $42.92, mode syncro (outer) #701-5D , if that’s the case you need part number 401701-5 your cost $50.900.
Suggest you start by checking the fluid level and condition, the rear case has a tendency to wear a pin hole under the oil pump in the rear case resulting in a low oil level and damage to the mainshaft and drive hub creating premature synco wear also. If the case has a whole you will need the following parts: Item 760-2A Case Half Rear NP263 STD part number MWTMG620001 your cost $195.00. Drive Hub / Bushing (splines into Drive Sprocket 2 piece syncro part number 401606 your cost is $48.98. Item 672D Main Shaft (49 Spline Pump) NP263HD, part number MWTNV48714 your cost is $199.89.
Other items you need will be Gasket and Seal Kit part number TSK261 your cost $39.99 and Chain item 700E 1.5″ wide 42 links part number MWTCL10-074 your cost is $144.40
If you decide not to repair or overhaul you transfer case let us know we can provide a manufactured unit. For more information on the parts we can provide for the NP263 see our website.
Categories: NP263 Transfer Case