Torque Converter or Transmission Pump

[604benz]

Hi Guys my transmission is making a howling noise in park and low speeds, my indy mechanic told me its the transmission pump but dealer said there is no pump just the torque converter, is this right. Also dealer quoted me $2400 for converter, i've seen them online for $1200. Has anyone replaced their torque converter, how much did it cost. Any input appreciated

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[Ausmbtech]

Sounds like your dealer needs a lesson in the inner workings of a automatic transmission. Of course it has a oil pump!!!

Howling noises from the convertor housing is usually the oil pump bushings, it's usually loudest if you listen to the oil cooler line from to the oil cooler.

[604benz]

Thanks for that info, any idea if its an expensive repair

[amx1397]

Originally Posted by 604benz

Thanks for that info, any idea if its an expensive repair

I have a spare, redbulljnky is testing it now, to make sure his is good or bad ,if he does not need it , i'll take 200 + shipping for it. I will try to get the part# from it in a few days, jim

[604benz]

Any idea what a new one costs?

[amx1397]

Originally Posted by 604benz

Any idea what a new one costs?

http://www.google.com/url?sa=t&rct=j...vv4M90Bqyh9LRw

$700.00

[Ausmbtech]

Gearbox out and disassembled for this job, quotes will vary.
If it's low milage and dealer serviced I'd approach them for a goodwill repair.

[josephpampliega]

Can also be both pump and torque converter ($325). In worse case, sometimes torque converter housing. Just changed mine last week.

What happens is the OE oil pump bushing fails and binds onto torque converter shaft which turns the oil pump ($500). Once that happens, the oil pump gears grind onto the torque converter housing ($600).

If your lucky you can sometimes sand down the burrs using a DA detailer sander or if you have the resource you can have the torque converter housing CNC milled.

This has happened to not just one, but all my Mercedes with 722.9 transmissions that I decided to start changing them myself.

Torque Converter 2212500502 (remanufactured) - Torco Enterprise - www.torqueconverter1.com ($325 shipped, no core required)

Oil Pump 7222700197 (latest rev.) (OE) - www.parts.com ($500 shipped) (you can also replace bushing with improved aftermarket bushing ($35) made by Sonax if the pump gears and housing are not damaged)

Torque Converter Housing 2112711501 (OE) - www.parts.com ($600 shipped)

Pictures is of the torque converter with spun bushing and torque converter housing off my 2007 S550.

I really think there is a design flaw with the oil pump bushing spinning off the oil pump housing. All my vehicles have been purchased new, and ATF changed at 1K then every 30K. I take care of my vehicles. I just accepted that it will eventually happen on any MB with 722.9 transmission regardless of care.

Next year when I purchase the W222 I will definitely purchase with extended warranty, one claim with the transmission will make it well worth it. Many will say your lucky to hit 80K miles and not have failure. I use to purchase these cars thinking extended warranty is not needed, I guess times have changed.

Good luck.

BTW, in my opinion this is one of the easiest cars to replace the transmission on due to the amount of room available around the bell housing (tool marks and scratches are unacceptable, should look untouched when completed). I being only a MB hobbyist/restorer and not a professional took 7 hours total removal/reinstallation on the W221. I'll post more pictures of the clearance and space I worked with to accomplish.

[604benz]

Great info thanks alot, it's going into my indy shop for diagnostics on Monday, i'll keep you guys informed.

[desired_speeds]

its not uncommon for 07s to get torque convertor problems. I don't think Ive seen any 08+ models have the issues though.