Audi A6 The mid-sized Audi A6 model offers more room to the driver and passengers over the A4 line.

Shifting issues

Old 06-17-2010, 08:25 PM
1st Gear
Thread Starter
Join Date: Jun 2010
Posts: 85
Default Shifting issues

Hello, I'm having an issue with my 2000 A6 4.2 transmission. I replaced the TCM recently after the drains clogged and flooded my module. Only one small problem, after clearing codes ( vag com ) on TCM and ECU, the car only briefly engages in drive ( about 1 full second ), reverse works fine. Looking at the measuring blocks, I can see the solonoids energize. The measuring blocks do indicate that the MFS is operating and sending gear shift selector location.
When it's engaged for that 1-1.5 seconds, it does not slip, you can " smoke " the tires. After that second, it feels like nuetral, no matter what gear you select. One thing I did see displayed that has me puzzled, when looking at the measuring block that shows what gear your " actually " in ( not what gear you selected ) it displays " 1M in when park is selected, it also shows 1M when " D " is selected. Is that normal? " N " shows up when in nuetral, " R " shows up in the block when in reverse. Why does it show 1M in " D "?
Thank you for the help. Low fluid issue?
Old 06-18-2010, 08:55 AM
1st Gear
Join Date: Dec 2008
Location: Erie Michigan
Posts: 171

I would take a close look at the plug that plugs into your tcm pull on the wires and make sure nothing has corroded and is coming apart. I would also coat it in dielectric grease to stop any ongoing corrosion.
Old 06-18-2010, 09:13 AM
1st Gear
Thread Starter
Join Date: Jun 2010
Posts: 85
Default pins and things

I have cleaned my connector pretty well and sprayed with contact enhancer. I'll start taking MA readings for each solonoid. I did check the trans. fluid last night, with vehicle at temp., plug removed. I found that there was no fluid I could touch with my finger through the hole. I also expected to lose some fluid through the hole when I shifted it into reverse, but didn't.

Old 06-18-2010, 10:06 AM
2nd Gear
Join Date: Oct 2007
Posts: 965

I'd suggest start with the fluid level. ATF evaporates as any other fluid.
What does happen when drive on manual?
Do the solenoid test and shake them.

Next think to look is the gear selector switch.
Related Topics
Thread Starter
Last Post
S Car Model Line
12-18-2017 06:27 AM
B6 Models
02-03-2013 02:55 PM
B6 Models
03-15-2012 12:46 PM
B5 Models
09-29-2008 12:18 AM
All Other Audi Models
08-26-2004 02:53 PM

Thread Tools
Search this Thread
Quick Reply: Shifting issues

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.