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2006-2009 Range Rover MkIII / L322
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16 Posts
Discussion Starter #1
I have recently changed my transmission pan, filter and fluid. Then after a couple hundred miles I drained and refilled. Planning on doing this once more. What is your opinion on using a scan tool to reset the transmission adaptive settings? I've heard differing opinions. Also I've seen that the procedure to help it relearn is rather complicated. Has anyone reset theirs and with what result? Thanks
 

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1,758 Posts
Maybe check my life on this site. I believe he strongly suggests not to as does our most knowledgable. I will be interested to hear if your fchanges improve the shifts. Ours is a bif rough on the 2-1 downshift at times and she is due for a refresh
 

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LEGACY VENDOR
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2,369 Posts
The answer to your question is, it depends.

If all seven solenoids are functioning correctly on your Mechatronic unit then resetting the adaptions is unlikely to cause an issue.

However, one of the most common problems with the 6HP26 is faulty solenoids. If you have one or more dodgy solenoids then the controller may have already set the adaptions for those solenoids to the extreme value for the range available to it. If you then reset the adaptions back to ‘nominal’ it’s possible that the controller will not learn the new adaptions in time before the clutches controlled by those solenoids burn themselves out. You will have then trashed your transmission and it will require a rebuild.

For that reason, it’s recommended that you should only reset the adaptions if you have either replaced the solenoids, or the Mechatronic unit, or possibly had the Mechatronic firmware updated.

Clearly, you just have to decide whether or not to take the risk.

Phil
 

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2006-2009 Range Rover MkIII / L322
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16 Posts
Discussion Starter #4
Is there a way to tell with a diagnostic scan tool if the transmission has compensated for a bad or failing solenoid?
 

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LEGACY VENDOR
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2,369 Posts
Only if the diagnostic tool is capable of reading and displaying the existing adaption values for each solenoid, before you reset them.

Phil
 
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