Yes but much reduced. I think it's more to do with holding the higher revs. It doesn't drop into neutral unless going very slow
Graculus
Well-Known Member
Then the torque converter is locking up OK, back to looking at speed and torque values - have you checked the output speed sensor is reading correctly?
i havent, i'll plug SDD in tonight and have a look. presume its called something obvious
What reading should i be looking for, how do i know if it's good or bad? And which speed sensor
Datatek
Well-Known Member
As said, "output speed sensor". With live data and the car moving it should produce a signal but since I know feck all about the L322 diagnostics where it will appear and what it's called, I don't know.
If you had clutch/torque slip you could have an input/output sensor correlation fault possibly? 
Graculus
Well-Known Member
The speed sensor for the transmission output in rpm - not the wheel speed sensors or the composite road speed on CAN, an actual rpm value from the TCM, there is also a turbine speed sensor (Transmission input speed) also in the TCM, there are not that many PID's in the TCM so you should be able to identify them - you're looking for the readings to be plausible - i.e. output is >0rpm when the vehicle is being driven and smoothly increases/decreases, same goes for turbine speed but you don't need to be moving to read that one. I can't remember the correlation to engine rpm (it may be 1:1) but it'd be worth having that displayed along with the turbine speed to check for any anomalies in speed variation - also check in 'S'.
Graculus
Well-Known Member
That would/should set a DTC, if the value is incorrect but still within the valid range, that'd give symptoms but no DTC.If you had clutch/torque slip you could have an input/output sensor correlation fault possibly?
Very true, Clutch opening and shutting time limits.
There seems to be a trend of solenoid gauze blockages. Vw Audi has a gearbox setup that suffers from this type of issue.
There seems to be a trend of solenoid gauze blockages. Vw Audi has a gearbox setup that suffers from this type of issue.
I didn't see a live data selection called output speed sensor but saw a few others.
Transmission output shaft speed was interesting, it was at zero apart from a spike when starting and a spike when stopping.
There was transfer box motion sensor voltage which went from low to high, the switch happened before i came to a stop
Transmission output shaft speed was interesting, it was at zero apart from a spike when starting and a spike when stopping.
There was transfer box motion sensor voltage which went from low to high, the switch happened before i came to a stop
It was supposed to have been done by the guy who did the oil change
Datatek
Well-Known Member
That does not sound right to me.
In the higher gears, with high throttle inputs it seems fine, there would be greater leakage and bigger symptoms?
That's what i thought
Datatek
Well-Known Member
No signal to indicate that the output shaft is turning would certainly confuse the ECU.
Graculus
Well-Known Member
Don't do that! The only time that should be done is if a software change requires it or solenoids have been replaced, doing so on a 'box that has had no work done can lead to some pretty bad shifts, some 'boxes never achieve their previously 'acceptable but could be better' shift behaviour.
