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Torque converter query

Flyingpig72

New Member
Joined
Jul 15, 2020
Messages
21
Location
Coventry
Car
W211 - E220 CDI
Hi I have an 04 W211 220CDI Avantgarde I appear to have a troublesome Torque converter and am sourcing a replacement. Would anyone know how I can find the correct torque converter for this model or are they all the same for this particular engine?
Have found a possible candidate to replace it with on eBay. Unfortunately I don’t know the part number of the original as it’s still on the vehicle and the garage can’t get it in to sort until next Thursday. Thanks for any help.
 
If you confirm the first 6 numbers of your Vin (eg 211.008) the Torque convertor Part numbers can be looked up.

Alternatively your own Torque convertor can be reconditioned at JPat near Bristol.
 
Hi the First 6 digits of the ViN are 211006
There are 4 possible Part numbers for the TC.
All will fit, the last the most updated part number.
You have a 722.699 transmission.

A 21 025 006 02
A 21 125 004 02
A 21 125 011 02
A 20 925 009 02

 
There are 4 possible Part numbers for the TC.
All will fit, the last the most updated part number.
You have a 722.699 transmission.

A 21 025 006 02
A 21 125 004 02
A 21 125 011 02
A 20 925 009 02

Excellent news I’ve checked it against the eBay listing it’s an A 20 295 009 02 so it should hopefully do the job.
 
Be careful with TC faults. We tend to get the valve body overhauled at the same time. This is because the lock up clutch valve (the common issue) wears inside the valve body. The friction material that naturally occurs during the gearbox operation wears the valve out. So for proper repair the lock up clutch valve needs to have a modified oversized valve machined and fitted.



These links show the valves and the tool used to repair it.
 
The garage initially diagnosed it as engine mount knock but it got worse over a few weeks - vibrating rotational noises especially at low revs or at idle which has gradually gotten worse, the gears beginning to slip, slow acceleration, loss of power and most recently engine management light has came on. My mechanic who is also my brother in law with 45 years in the trade is querying if one or more of the bolts that hold the TC on might have sheered which could be causing the noise, he was initially going to look at that but then thought rather than dropping the transmission twice with labour costs it might be prudent to source a replacement for a good price and I found this one on eBay.
 
The garage initially diagnosed it as engine mount knock but it got worse over a few weeks - vibrating rotational noises especially at low revs or at idle which has gradually gotten worse, the gears beginning to slip, slow acceleration, loss of power and most recently engine management light has came on. My mechanic who is also my brother in law with 45 years in the trade is querying if one or more of the bolts that hold the TC on might have sheered which could be causing the noise, he was initially going to look at that but then thought rather than dropping the transmission twice with labour costs it might be prudent to source a replacement for a good price and I found this one on eBay.
That sounds more like an internal gearbox problem. Especially as its slipping. Its easy to see if one of the bolts has sheared, there is an inspection hole. I would be checking that first.

Before you buy anything and waste money on parts I would diagnose it properly. If you have lack of power, this is unlikely be a gearbox issue. I expect the engine is in limp mode and that needs to be investigated. If you have an engine light it makes the diag easier.

If the gearbox is slipping then the fluid level needs to be checked and then the gearbox sump pan removed to check for any debris in the bottom of it. If there is slipping and the gearbox is noisy the I will expect there to be. If there is, it will need a re-build. It might be prudent to take it to a MB specialist near you for proper diagnosis.
 
It hasn’t - unfortunately the garage has been exceptionally busy so admittedly he’s going on a haunch based on his experience he’s had it on the ramp twice and checked it over and they ran a diagnostic but hasn’t had time to remove the under trays and hasn’t (to my knowledge) done a glycol test yet. The replacement TC on eBay was only £65 with a money back guarantee so was worth the gamble.
 
£65. Second hand?

What is your chassis number or reg?
 
That sounds more like an internal gearbox problem. Especially as its slipping. Its easy to see if one of the bolts has sheared, there is an inspection hole. I would be checking that first.

Before you buy anything and waste money on parts I would diagnose it properly. If you have lack of power, this is unlikely be a gearbox issue. I expect the engine is in limp mode and that needs to be investigated. If you have an engine light it makes the diag easier.

If the gearbox is slipping then the fluid level needs to be checked and then the gearbox sump pan removed to check for any debris in the bottom of it. If there is slipping and the gearbox is noisy the I will expect there to be. If there is, it will need a re-build. It might be prudent to take it to a MB specialist near you for proper diagnosis.
Admittedly it could be the gearbox, although I should have said dodgy gear changes rather than slipping just to clarify. The lack of power is probably limp mode yes, when you restart the ignition it returns to normal again.
My brother in law has 45 years in the trade with respect he knows what he is doing; he just hasn’t had the time to look at it properly yet, to be honest his haunch was that that the TC bolts is the likely culprit but on seeing a cheap second hand one on eBay for £65 he suggested I snap it up just in case. Obviously if it turns out to be something more then we will sort the gearbox if it’s required.
 
That sounds more like an internal gearbox problem. Especially as its slipping. Its easy to see if one of the bolts has sheared, there is an inspection hole. I would be checking that first.

Before you buy anything and waste money on parts I would diagnose it properly. If you have lack of power, this is unlikely be a gearbox issue. I expect the engine is in limp mode and that needs to be investigated. If you have an engine light it makes the diag easier.

If the gearbox is slipping then the fluid level needs to be checked and then the gearbox sump pan removed to check for any debris in the bottom of it. If there is slipping and the gearbox is noisy the I will expect there to be. If there is, it will need a re-build. It might be prudent to take it to a MB specialist near you for proper diagnosis.
Admittedly it could be the gearbox, although I should have said dodgy gear changes rather than slipping just to clarify. The lack of power is probably limp mode yes, when you restart the ignition it returns to normal again.
 
With the labour involved fitting a second hand torque converter isn't very sensible.
I had min reconditioned for £240 😉
 

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