2005 Yukon Shifting Issue's

[Bergy9]

My wife has a 2005 Yukon half ton with the 5.3 with 118,000 or so miles on it with the typical speedo problem. Yesterday I was trouble shooting a squeek from the front drivers side wheel area. I replaced the drivers hub (speedo seems to work) and then I drove the truck maybe 5 miles and parked it. When I got in it 10 minutes later I started the truck, put it into reverse and heard a clicking noise and had no reverse, no drive, no 1, 2, or 3, no nothing. Shut the truck off and tried it again, nothing. Put the 4WD selector into 4H and had reverse and all my gears again I then put it in 4 Auto and every thing seemed fine. Drove it in 4 Auto, and put it in 2H went home. A short time later when to drive it and it produced an even loader clicking noise and had no gears what so ever...even no park. It was rather loud so I asked my wife if she heard the clicking from in the house and she said no. Did what I did earlier and had the gears back. So at this point I am thinking some thing electrical? So I looked in my Hanes and started to think maybe it is the Park/Neutral Position (PNP) switch, or even the Brake/Transmission Shift Interlock, but on the BTSI the shifter moves so I am thinking no on the BTSI.

 

I can not wrap my head around the 4WD selector switch having anything to do with the tranny, but then again the transfer case would be involved.

 

Thank You in-advance for any help or suggestions.

Dave

[Bergy9]

Here is additional information. The only way the truck will move under its own power is if it is in 4WD Auto. I got moving down a road selected 2H and within 20 to 30 seconds it was if the transfer case was in N. So now I am thinking it is something with the selector on the transfer case? Any ideas would be great.

[00Silverado4x4]

No expert but by the sounds, your transfer case isn't shifting correctly. I'd get it looked at. If you are getting clicking then you definitely have a problem I'd let a pro take on. Just my thoughts.

[Bergy9]

Yes I agree transfer case, and I am leaning towards a bad transfer case shift motor, but at nearly $300.00 from Napa I would like a second on my thoughts prior to buying a part at that price, and the problem still being pressent. Just another example of why I like the old school shifter's verse push buttons.