TRNW-2: FW6A-EL Mazda 6 speed units Pressure Switches

[Fred Whitaker]

 I had one in this family several years ago that took out the sprag. It wasn't drivable when it came in. When I got it back together it worked great cold. But when it got hot it would neutral out at a stop and catch when you give it gas (which is what took out the sprag).  I figured it being linear solenoids it was like an AW55. But no solenoids were available without a free valve body. I got a valve body from buffalo engines,and it looked like it was NEW. Which fixed it.
  It had other issues going on hot but worked picture perfect cold and acted just like an AW55 with sticky solenoids. I never saw that one again and have yet to see another one.  I guess it could have been pressure switches. I will never know because I replaced whole VB.
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From: trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of Mathieu Langlais via trnw2 <trnw2 at trnw.net>
Sent: Wednesday, October 1, 2025 1:30 PM
To: Dan Hogan <danhogan at busterstransmission.com>; Technical Discussion Forum <trnw2 at trnw.net>
Subject: Re: TRNW-2: FW6A-EL Mazda 6 speed units Pressure Switches

We replaced a few transmission for 3-5-R problem on some CX-5 . We installed low mile used.

[https://ci3.googleusercontent.com/mail-sig/AIorK4x27PWUp2dB50en00dd4b-bXtW-7CVyFkPMkp0DenZF3QgRErXPFd2LLc1rQuUCieUyhh_RJGTklz2G]
Mathieu Langlais
Transmission L'Archeveque Inc.
450-471-7733


On Wed, Oct 1, 2025 at 2:25 PM Dan Hogan via trnw2 <trnw2 at trnw.net<mailto:trnw2 at trnw.net>> wrote:
Fishing for some experience with these 6 speed units.

I have a 2018 CX5 in the shop with a customer concern related to a bumpy 2-3 and 4-5 shift at times.  No codes are present.  We are going to do a pan inspection.

Ive dug into the Fix database and see a similar issue posted by Dean down in NZ related to a TCM failure.  I suspect I may have a pressure switch issue as the shift concern on the 2-3 shows a double tap on the 35R pressure switch PID.  When the shift is smooth and normal, pressure switch closure is one event.

Has anyone encountered the TSB described failure of the pressure switches on these units?  Always codes?  Shift quality directly affected?

Thanks for any experience with these units.


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Dan Hogan

Buster's Transmission Service

https://busterstransmission.com

704.847.5321

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