Club Touareg Forum banner
Cancel
Create thread New Garage Forums

Transfer Case Adjustment...?

Jump to Latest
1 - 20 of 29 Posts
0

00704

· Registered
Joined
·
39 Posts
Discussion starter · #1 ·
I’m on my third transfer case and stepper now, and just replaced the transfer case controller under the passenger seat. Things are “better” for sure but not right.

I still hear some chain noise. It’s not a jumping noise, but sounds like a 10-speed bicycle when your shifter is between gears at times...

What direction should I go? Is it adjustable with a handheld VAG (which I have) or is a full laptop VAG necessary? Or is there some other way to reset/correct this?

So close to junking this thing as this driveline issue is keeping me from fixing other things on it. If I had this part fixed I’d gladly do the test and drive it.

I appreciate any thoughts or information.


Sent from my iPhone using Tapatalk
 
Discussion starter · #3 ·
No...sorry. The first one was swapped out due to pure ignorance on troubleshooting. I replaced the stepper and did nothing else. I was working remotely and had a company truck, parked it then had to get it going again unexpectedly when job ended. So swapped different case in and drove it home 20hrs towing a trailer. Not sure what mechanic did or didn’t do but the whole thing eventually got to shaking and leaking and chain began jumping.

This case seems good and came from low mile vehicle.


Sent from my iPhone using Tapatalk
 
Discussion starter · #9 ·
Well I’m taking about both. There’s a controller box under the passenger seat that I just swapped out. Between that and resetting the plugs on the stepper motor my blinking selector on console has stopped blinking.

The case I cannot say for sure. I’m looking for the docs.


Sent from my iPhone using Tapatalk
 
#10 ·
If you or your mechanic are just throwing parts at it randomly, it's going to be hard to diagnose anything.
The the Tcase was changed, then the replacement must be one of the versions that is compatible.
If the TCU was changed, how was it determined that the TCU had fried, etc? Why would the chain inside the Tcase jump?
If you have leaks and noise, you can't possibly have the correct gear oil and level.... unless you're already starting off with a damaged Tcase. (or you had a non-compatible ID swapped in and it self destructed as a result)
If you are replacing the stepper motor, thanks another scenario...... was it installed with the master spline in the correct orientation based on the position of the selector switch, etc?
 
Discussion starter · #11 ·
The case is a compatible version, I just cannot locate the code at the moment.

The TCU was based on the blinking light, the 2039 code and how the case acted.

I have NO leaks in this case, no jumping chain. Just a bit of a slip/grind noise like a bicycle make during gear changes.

The stepper installed is the one that came on the case. The prior change did indeed include adjusting the splines to the exact position of the one that was being removed.


Sent from my iPhone using Tapatalk
 
#15 ·
Dump the fluid and put fresh stuff in. Look at what comes out.... if there's lots of debris\dirt\wear, it will be an indicator of the condition of what you're working with. After that, I'd start looking at the stepper motor (depending on what comes out with the old fluid)
 
Discussion starter · #16 ·
I’ll do whatever, but it seems I get the same results no matter what.

What this one is doing is what the original one did and a new stepper made no difference. The second one was similar but seems to have been not a good case for other reasons. Now this one, low miles and clean same thing.

It’s like nothing ever changes. Is there no way to zero out or recalibrate things such that the transfer case is put in high and it is what it is? Or perhaps adjust it one way or the other to get it all aligned?

Are there any aftermarket fluids suitable for this or is it the VW stuff and nothing else at all?


Sent from my iPhone using Tapatalk
 
#17 ·
The manual indicates that when a stepper motor is replaced, it needs to be orientated accordingly to what the selector switch position is in. I asked about this previously, and you said you were aware and it was good. I have no idea what you or the mechanic did prior to this point, but if that alignment isn't correct, you probably have the motor activating the clutches at the wrong time, etc. Validation of this should be when you dump the fluid and you have all sorts of clutch material\grime in it (especially if you put fresh stuff into it when you replaced the tcase).

The chain cannot slip unless there's major wear on it and the gears.

The centre differential lock is a multiple-disc lock that is actuated by an electric motor. The electric motor turns a cam which actuates a pivot arm. The pivot arm then pushes against an engaging plate. The engaging plate presses the disc pack together. The centre differential lock is always engaged. A planetary gear set with gear reduction is connected to the actuating motor on the load side. This allows the required torque, calculated by the control unit, to be set very quickly and exactly. The amount of pressure necessary for the differential lock to operate without slipping is always applied to the multiple disc clutch.
Click to expand...
If your fluid is funky, then it sounds like the pressure isn't being applied correctly.
 
Discussion starter · #18 ·
Understood. I have not taken this stepper off. On the original case, I swapped motors and set the new one to be where the old one was.

That said, if I were to pull this one off – how can I match it to what the selector switch says? I mean, I know how to move it without messing up the splines, but how do I know I have a 1:1 match with, say, high range?


Sent from my iPhone using Tapatalk
 
Discussion starter · #20 ·
So I’m reading this right.... when I put the vehicle in high range, remove the stepper, the shaft should be approx in the 12 o’clock to 2 o’clock range.

I should then rotate the stepper splines appropriately to match the shaft then reassemble?


Sent from my iPhone using Tapatalk
 
1 - 20 of 29 Posts
About this Discussion
28 Replies
2 Participants
Last post:
TurboABA
Club Touareg Forum
posts
784K
members
105K
Since
2003
Club Touareg Forum is a forum community dedicated to Volkswagen Touareg owners and enthusiasts. Come join the discussion about VW Touareg Sport Utility Vehicles and more!
Full Forum Listing
Explore Our Forums
General Maintenance & Repair Australia & New Zealand Brakes, Steering, Suspension, Wheels and Tires Mobile Electronics and In Car Entertainment General Touareg Discussions