TRNW-2: 10L1000 P0747 Gm Fix….

[tucker tuckertrans.com]

The GM tsb did correct the problem.  Easy job to do.

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________________________________
From: trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of Dan Hogan via trnw2 <trnw2 at trnw.net>
Sent: Thursday, August 28, 2025 12:21:14 PM
To: Technical Discussion Forum <trnw2 at trnw.net>
Subject: Re: TRNW-2: 10L1000 P0747 Gm Fix….

Thanks Dan.  I was wondered when GM was going to issue something more than just valvebodies to fix this issue.

What was an old problem is new problem ... again...guess more guaranteed work for us all.

Looks like the new valve is steel (not anodized aluminum like the original) and the replacement spring is different in design.  This must be to reduce side loading on the valve aggravating the wear issue.  Appears they are also re-routing the balance oil through the new valve instead of being fed by a seperator plate orifice hence the replacement plate (similar design as sonnax's replacement).

[cid:c2dedde7-ed72-44ae-bac9-1531e2a9b0f8]

We keep the sonnax valves here so far just in case.

Attached is the bulletin related to this work Dan posted for all.


---


Dan Hogan

Buster's Transmission Service

https://busterstransmission.com

704.847.5321

________________________________
From: trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of tucker tuckertrans.com via trnw2 <trnw2 at trnw.net>
Sent: Wednesday, August 27, 2025 1:48 PM
To: Technical Discussion Forum <trnw2 at trnw.net>
Subject: TRNW-2: 10L1000 P0747 Gm Fix….

Group,

We just got these in to 'supposedly fix' the 10L1000 P0747 neutral in 4th hot.  I'm not so sure about it, but what do I know.  The TSB is 25-NA-158 I think, going by memory.  It came out August 18 and it automatically canceled all the valvebodies we had ordered.  Time will tell

Dan Tucker

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