thanito - 12/20/2011 3:11 AM

Yet still, the motor works for a while every time you start the engine to check the position,right?
There is one thing that I cannot understand though: WHY there are times that while driving you feel a big clunk and the TC goes in neutral? Since this motor only works when engine starts and when you use the H-L button?

otiswesty - 1/13/2012 12:24 PM

I have had a couple of issues recently
My TC indicator was blank again, but otherwise fine, no neutral spells. I could still shift between H and L but with a power cycle the indicator would blank out again. The TC control module had been updated to a gen 3 version a couple of years ago when I previously had issues with the TC in neutral.

Also, last winter in Baja I was having a temporary problem with my lockers not working. We fixed this by cleaning the contact at the electro-vaccuum actuators on the firewall and they worked fine for the rest of the 3 month stay. The locker problem recurred this Fall and I had plans to do some work myself like replace the TC shift motor and the dual locker actuator.

Since I was due to for a Service B (and it was 27 degrees outside) I decided to mention it at the dealer. They found that the TC locker was bad and dead to current. They thought this would solve both conditions but only fixed the TC. The vaccuum system had a bad check valve and the pump was running full time even with the check valve replaced. They replaced the vac pump and both rear lockers work like new.

So just want to point out that it is not always the shift motor, and I'm glad I didn't just throw parts at a problem that I did not fully understand. Just sayin'

otiswesty - 1/13/2012 4:39 PM

Ya, driving to LA at the end of month and over the border feb 11th or so

4x4abc - 5/1/2012 5:57 PM

the motor rarely ever goes bad - it's the old style plastic gears you have to worry about

your only solution is a new unit from MB, since nobody here has found a source for the gears only yet

Balto - 7/12/2012 9:41 PM

BonitaBeast,

Did the problem go away after you replaced just the motor? I know it took you awhile to get the new module to work BUT the time between the new motor and the module working did you have any TC problems?

Thanks.

BonitaBeast - 7/12/2012 8:46 AM



No TC problems after replacing just the motor. H was always visible on the dash and no slippage of the transfer case into neutral for the last few months. But for piece of mind I really wanted to have the newest TC module installed which is why I forced the issue. I figured there's a reason MB updated the module 4 times.

No TC problems after replacing just the motor. H was always visible on the dash and no slippage of the transfer case into neutral for the last few months. But for piece of mind I really wanted to have the newest TC module installed which is why I forced the issue. I figured there's a reason MB updated the module 4 times.