TRNW-2: 6r140 valve body and sonnax tooling

[Fred Whitaker]

  Just a "Bump" for Justin. I too am wondering if anyone has a better Mouse trap. I have fixed a number of these by just slapping on a Ford valve body ,never really looking into just what might be causing problems. I have always leaned towards blaming solenoids with no proof.
 Looks like Transgo still has nothing. Not much to the Sonnax Zip kit. I have my doubts about their Oringed end plugs they seem to put in EVERY Zip Kit.
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From: trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of Justin Merritt via trnw2 <trnw2 at trnw.net>
Sent: Tuesday, December 30, 2025 1:45 PM
To: Technical Discussion Forum <trnw2 at trnw.net>
Subject: TRNW-2: 6r140 valve body and sonnax tooling

Hello all,
I am starting to see more and more 6r140s hit my bench.  I am comfortable with working on them with great success.  I have always just replaced the valve body with a ford OEM, but it seems these valve bodys are getting priced to where I may need to look at repairing them vs replacing them.  I do not mind investing in sonnax tooling that is needed to fix transmissions.  However, I don't believe in needing to ream and oversize every valve just because there is something available.  What are the high wear areas that will need to be addressed if I decide to tool up and repair these valve bodys?

Thanks Justin
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