O1m tq convertor locking in R and all gears

So I assumed the 540k km transmission was done but I thought I would try and revive it for a bit. The symptoms are uncommanded lock up in all gears including R. This may or may not occur at start up and initial movement.

What has been done: shift kit in attempt to alleviate symptoms, another vb and solenoids (all test perfect), a new transmission harness, another tcm.

When reviewing a troubleshooting pdf it indicated that if you disconnect the harness from the transmission and get fail safe mode then the trouble is electrical. This is what occurs. R, 1st, and 3 work with the harness disconnected. It does not lock up at all with the harness disconnected.

This would lead me go believe it was a car wiring issue. Maybe the wire to pin 6 is grounding out? Unfortunately I cannot get pin 6 on the car side to short to ground when wiggling the wiring harness from trans to the tcm.

Anybody have any ideas?

335 miles (for us rednecks) is A TON OF MILES for that sorry 01M. seriously one of the worst transmissions put in a VW. my advice, huck it in the garbage and go get a 5 speed manual and swap it.
it could be a wiring issue, VW this old have serious issues with wires getting eaten from dry rot, chemical oils and what not getting on them, heat and just age. get a multimeter and check continuity on both sides of the harness.

Mongler98 said:

335 miles (for us rednecks) is A TON OF MILES for that sorry 01M. seriously one of the worst transmissions put in a VW. my advice, huck it in the garbage and go get a 5 speed manual and swap it.
it could be a wiring issue, VW this old have serious issues with wires getting eaten from dry rot, chemical oils and what not getting on them, heat and just age. get a multimeter and check continuity on both sides of the harness.

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Both sides ohmed.

Reconnected everything and went for a drive with the vagcom connected. Car drove fine besides a 2-3 flare. Flare was not there when full throttle. Data on vagcom regarding trans kept dropping on and off line. It did not do this for the engine readings.

This time there was no uncommanded lock ups.

Currently no codes

Still no codes. After bringing it up to temperature got it to lockup in all gears with the harness unplugged. When it cools down I will try and r&r the tcc solenoid. My last ditch effort.

Likely you've already seen this, but there are some good tips over at KansasCityTDI.com

Yes, thank you Bob. This will probably be my last attempt at resuscitation.

Nope, she's knackered. Anybody in the market for a mint body 2003 Golf? Little rust around the bottom of the tailgate is all there is.

MotorCityMadman said:

Maybe the wire to pin 6 is grounding out? Unfortunately I cannot get pin 6 on the car side to short to ground when wiggling the wiring harness from trans to the tcm.

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Maybe it's not shorting to ground but breaking a power feed?

No power may be interpreted as shorted to ground.

MotorCityMadman said:

Still no codes. After bringing it up to temperature got it to lockup in all gears with the harness unplugged. When it cools down I will try and r&r the tcc solenoid. My last ditch effort.

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I would ohm out the solenoid when the transmission is at operating temp. My guess the solenoid operates fine when cold but reaches Infinite resistance when hot.



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mr.loops said:

I would ohm out the solenoid when the transmission is at operating temp. My guess the solenoid operates fine when cold but reaches Infinite resistance when hot.
Thanks, have tried that but haven't caught it at anything but normal. I have swapped in another solenoid as well.
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Thanks, have tried that but haven't caught it at anything but normal. I have swapped in another solenoid as well.

MotorCityMadman said:

Nope, she's knackered. Anybody in the market for a mint body 2003 Golf? Little rust around the bottom of the tailgate is all there is.

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Bring it to me in Ontario, and I'd give you $400 for it