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Old 01-25-2018, 05:43 AM
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Join Date: Feb 2016
Location: Sweden
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OM606, flexplate replacing 722.4 with 722.6?

Hi everyone!

I've successfully made a swap to an OM606.910 (NA from w124), sadly the 722.4 automatic that came with it won't do in an old G-wagen and a final gear of 4.88. I'm looking to replace it with a 722.6. I've never worked on transmissions before, I barely know the parts involved. I'm getting a separate controller unit, so the electronics should be sorted out.

Anyway...

Question: When getting the 722.6 transmission from the scrap yard, need I buy a compatible flexplate? Or can I use the flex plate from the 722.4?

Thanks for any assistance!

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1985 W460 300GD OM617.912 w/ STT turbo (ongoing OM606 engine swap)
2011 W212 E220 CDI
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Old 01-25-2018, 11:17 AM
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I would use the original flexplate from the 722.6’s torque converter to be sure. If you pull parts yourself, keep the flex plate bolted to the torque converter at checkout.

Sixto
98 E320s sedan and wagon
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Old 01-25-2018, 12:02 PM
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Location: Modesto CA
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Quote:
Originally Posted by superapan View Post
Hi everyone!

I've successfully made a swap to an OM606.910 (NA from w124), sadly the 722.4 automatic that came with it won't do in an old G-wagen and a final gear of 4.88. I'm looking to replace it with a 722.6. I've never worked on transmissions before, I barely know the parts involved. I'm getting a separate controller unit, so the electronics should be sorted out.

Anyway...

Question: When getting the 722.6 transmission from the scrap yard, need I buy a compatible flexplate? Or can I use the flex plate from the 722.4?

Thanks for any assistance!
The flex-plate, and the flywheel/ring gear (if separate) must have bolt patterns that match the engine crankshaft as well as the torque convertor. The existing flex-plate assembly from the 606 obviously fits the engine. Does the flex-plate bolt pattern for the convertor match the intended use convertor?

If you feel that a 722.4 is not strong enough, consider using a 722.3. Keeping an all-hydraulic transmission is much easier than the sorting out process involved in adapting an electrically controlled transmission that requires feedback that a G-wagon may not be equipped to provide.


Last edited by Frank Reiner; 01-25-2018 at 01:05 PM.
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