Auto Tranny Jerked on me w/ a flashinig "AT" light - Page 2 - Mazda3 Forums : The #1 Mazda 3 Forum
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post #11 of 19 (permalink) Old 02-02-2020, 12:44 PM
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I recommend that you have the codes read before hanging on any parts (which will require a reader capable of reading the TCM). Although I'm familiar with what VWandDodge wrote, and agree with him about lots of TCMs overheating and going bad, the part about 'fluid all over the dipstick' sounds a bit ominous to me. Regardless if the TCM is bad or not, the stick should only ever have a solid fluid mark somewhere on the bottom (or nothing at all if the fluid level is too low). Fluid 'all over' sounds like it's being 'spit' or churned up onto the stick, neither of which can be a good thing. Perhaps the codes set in TCM can provide helpful information about exactly what's going on with this tranny.

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post #12 of 19 (permalink) Old 02-02-2020, 03:07 PM
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I recommend that you have the codes read before hanging on any parts (which will require a reader capable of reading the TCM). Although I'm familiar with what VWandDodge wrote, and agree with him about lots of TCMs overheating and going bad, the part about 'fluid all over the dipstick' sounds a bit ominous to me. Regardless if the TCM is bad or not, the stick should only ever have a solid fluid mark somewhere on the bottom (or nothing at all if the fluid level is too low). Fluid 'all over' sounds like it's being 'spit' or churned up onto the stick, neither of which can be a good thing. Perhaps the codes set in TCM can provide helpful information about exactly what's going on with this tranny.
I forgot to add when the code is pulled for the TCM, the error is U0101. With his symptoms, the solenoids aren't sure how to behave, which would lead to fluid be churned internally. Check the codes, but I'm betting that's the issue. I doubt low or high fluid levels cause what he's experiencing.

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post #13 of 19 (permalink) Old 02-02-2020, 08:33 PM Thread Starter
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Originally Posted by m3iguy View Post
I recommend that you have the codes read before hanging on any parts (which will require a reader capable of reading the TCM). Although I'm familiar with what VWandDodge wrote, and agree with him about lots of TCMs overheating and going bad, the part about 'fluid all over the dipstick' sounds a bit ominous to me. Regardless if the TCM is bad or not, the stick should only ever have a solid fluid mark somewhere on the bottom (or nothing at all if the fluid level is too low). Fluid 'all over' sounds like it's being 'spit' or churned up onto the stick, neither of which can be a good thing. Perhaps the codes set in TCM can provide helpful information about exactly what's going on with this tranny.
I have a Scanner...I got the CEL U0101 "Lost communication with TCM".....And car went into Limp Mode...etc...

I pulled out the TCM its an "A" model TCM...I guess the newest one is an "E" version now...


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post #14 of 19 (permalink) Old 02-02-2020, 08:34 PM Thread Starter
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No Dash update...left it alone...

Not sure what to do now...haha....Oh wellz.

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At 147K miles, you did well. Mine went out before 90K miles, and a lot of Internet search I executed back when mine went out showed them failing in as little as 35K miles.

Let us know the outcome.

P.S. You never did follow-up with pictures or details involving the repairs of your dashboard.


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post #15 of 19 (permalink) Old 02-02-2020, 09:20 PM
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I have a Scanner...I got the CEL U0101 "Lost communication with TCM".....And car went into Limp Mode...etc...
Ok, sounds like the one that VWandDodge posted earlier, and hopefully the updated TCM will get it back on the road quick.

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post #16 of 19 (permalink) Old 02-02-2020, 10:11 PM
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I have a Scanner...I got the CEL U0101 "Lost communication with TCM".....And car went into Limp Mode...etc...

I pulled out the TCM its an "A" model TCM...I guess the newest one is an "E" version now...
Yup. Do some searching for either a reconditioned unit or the "E" version. Shop around! And remember, like I said, you can replace it yourself. There's no reason for the PCM to be reprogrammed to play with the TCM.

Also, just curious if you've been servicing the transmission fluid and filter per the manual? If not, I strongly suggest you bite the bullet and replace them while Penny is down. People seem to think automatics are drive until they fail. WRONG. Service them per the schedule and they'll go for a long time. I had mine rebuilt a couple of years ago to the tune of $1,800 and zero regrets. No car payment!

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post #17 of 19 (permalink) Old 02-05-2020, 12:27 AM Thread Starter
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SO....***UPDATE***

My super rad Boss gave me straight up cash to help me out buy a new TCM and also my awesome Mom....SO....after taxes I bought a Brand NEW TCM version "E" supposedly for $536 smackers and being delivered tomorrow!!!....So Penny will hopefully be back in action tomorrow!

I wonder if the TCM is a FoMoCo brand part?....Is that why its shitty?...LoL

Ok...Well thats it for now!
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post #18 of 19 (permalink) Old 02-06-2020, 11:00 PM Thread Starter
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Another UPDATE**

New TCM Installed...and WOWZA...I think my car drives even better now....Not sure this newer version of the TCM tweeked the gearing or something....it just seems to accelerate smoother...Or it can just be mental...haha/

Glad I had people to help me out to get my Penny kick'in again!
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post #19 of 19 (permalink) Old 02-07-2020, 07:07 AM
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Another UPDATE**

New TCM Installed...and WOWZA...I think my car drives even better now....Not sure this newer version of the TCM tweeked the gearing or something....it just seems to accelerate smoother...Or it can just be mental...haha/

Glad I had people to help me out to get my Penny kick'in again!
Don't forget regular fluid and filter changes for Penny's transmission.

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