Mitabud - 12/10/2009 10:18 PM Has anyone replaced parts in the shift module on a '99-'00 G500? We replaced a badly slipping transmission with a new factory unit, but it still sometimes sticks in first gear when lever is placed in D position. It happened a half dozen times in the first 9 years of life on the original trans, but it's happening regularly now. Fix is to pull over, shift back into P, then into D again. If it's cold outside (<50F, So. Cal), it may take two tries till it wants to shift properly. Once warmed, problem usually disappears. Oil level is exactly full. I wonder if something electronic in the shift module needs replacing but I don't want to disassemble this unit if it's a bear, or special tools are needed. I'm told this module is quite similar to '98+ C class car, so if anyone has tackled this repair, I'd like to hear about it. Apparently parts for the module are available, but not the module as a complete unit.

ewikran - 12/13/2009 5:28 AM

I have the problem of not being able to shift into 3-2-1. D and R works and no other problems. I suspect that the shifter could use a good clean and lubrication. If someone could post the WIS job sheets as given by MiN above I would be grateful.

ewikran - 12/13/2009 5:28 AM
If someone could post the WIS job sheets as given by MiN above I would be grateful.

martin - 12/28/2009 4:03 PM

The second problem is now I can't start the engine.

I think there is a solenoid disconnect circuit through the Neutral and /or Park switches.

martin - 12/28/2009 9:49 PM

Thanks for help Dutch. I already have an EPC account and referenced that exact image.

After I wrote my first post, I removed, disassembled, reassembled and reinstalled the floor shifter assembly again. I've done this several times now so it only takes about 15 minutes to do the entire procedure. The problem of not being able to shift beyond Drive still persists. I think there must be something not lining up or out of adjustment. When I first removed the assembly from the center console area, I noticed that it had been apart before. Screwdriver marks on the housing clips. It worked when I bought the truck, but I haven't used the lower gears for awhile. Trying to get prepared for an Anza Borrego weekend.

I don't think any of the three electical connections are a starter lockout or override, so I'm stumped as to why I don't have any ignition now.

Maybe some of the other early 463 guys have done this rebuild and can shed dome light on the issues.

Thanks.
-Martin

martin - 12/30/2009 8:00 PM



There is a transmission range recognition switch (S16/10) in the shifter assembly. I think this is were my problem lies. I think the switch is not recognizing the Neutral or Park positions and therefore NO ignition. Does this sound logical?

The switch (P/N A 210 545 13 32) is expensive at pennies less than $100 at my local dealer.

It can be had from the right source for about $68.

Did you follow the detailed instructions for the installation and position of gear shift selector and that switch, as indicated in Step 9 of the WIS instructions?

martin - 12/29/2009 12:03 AM

The second problem is now I can't start the engine. I decided to reassemble the shifter despite the fact that I hadn't cured the 1-4 shift issue and reinstall it in the truck. Easy enough to do, 4 bolts, three unique electical plug connections and snap on the shift rod linkage. There is no voltage to the starter. All the other electrical stuff works. I held the ignition key in the start position while I shifted from P (GL) to D thinking that there might be a misadjustment in the shift linkage, but nothing.

Any tips, help, advise to get me going again will be hugely appreciated.

Thanks.
-Martin

ARH - 1/1/2010 10:47 PM

I have a similar problem, though I do not think it's related to the shifter mechanism.

Same year truck; the transmission won't shift to the last gear (fifth?), and it shifts kinda rough between the four first gears. I thought oil temperature might be the culprit (we've had -20C here lately), but the problem persist when the truck is warmed up.

Any suggestions?

nadd - 1/2/2010 12:59 AM



Did you try "resetting" the "brain" of the transmission to re-learn the shift pattern according to your driving style? Can't do much harm, might help if it's an electronic problem...let me go find the thread..

ARH - 1/4/2010 4:21 PM

Actually, yes. I tried that exact same procedure months ago (thought it was revving too long before shifting) - didn't feel a single difference in shifting characteristics. Had a workshop reset the transmission and delete the codes - still no difference. Now, several months later, this pile shifts like utter crap.

Thanks for the tips, tho!

I also hope Martin doesn't mind me doctoring his photo!

J.R. - 10/24/2010 7:11 PM

Just finished overhaul of the shifter.

Any idea what this light pigtail goes to. It's been a long day and I don't recall where it goes.