Hello Everyone!
My friend is having an issue with his 2007 acura TL 3.2L automatic 5 speed Tranny....
I'll try and keep it short
2 years ago his original trans was acting up. Brought it to a shop, and they "rebuilt" it... within the year, it was acting up again, with different symptoms. The shop couldnt figure out what the problem was. So after leaving the car there over 2 months with them, my friend took it back.
He, then bought a Transmission from JDM Engine depot in NJ. had a local shop put it in for him. After they got it running, the car had a check engine light on and would kick the car back into 3rd gear, once it hit 5th gear.
The codes that come up consistently every time are...P0757 shift solenoid B stuck on
p1743 shift error K
p1745 shift error M
P1780 shift control system (trans default mode)
He reached out to me about this, since this 2nd mechanic told him it's something electrical wrong with the car, and he cant fix it.
I got the car. I swapped around all the solenoids, the 4 that are inside the cover, and the 2 outside, cleaned all the strainers that go under them as well. Also checked all the wiring and connection . Everything was showing correct operation according to the scantool and meter....
So we decided to take this used tranny back to the place he bought it and get another one, under the 30 day warranty. We installed i . And the EXACT issue is still happening with the car! So it's not the internals of the transmission.....
This is where I'm at right now...
in Manual mode you can drive the car with No issue in 1st, 2nd, 3rd and 4th gears. Once the car shifts into 5th gear, within 10 seconds or so, it kicks the tranny back down into 3rd gear and throws those 4 codes mentioned above. Everytime.
I swapped around all the shift solenoids inside and out, cleaned everything I could and checked all connections. Scantool and voltage on the meter is showing the shift solenoids working exactly as their supposed to. So I'm not seeing shift solenoid B stuck on at all.
I've also swapped around all the pressure sensors to see if anything changes at all. NO change.
This problem had to of been introduced from that second mechanic. Because the car didnt have these codes or symptoms with the first bad trans.

I was told, Japanese transmissions are identical to US. So of that's true, then this trans should work fine

Only thing I noticed is that when I pulled off the connector to pressure switch 4, I get the exact codes and No change with anything else. But I swapped that sensor with the other that is identical and no change at all. So I dont think it's that sensor....

As far as Grounds, I only see one strap from body to trans mount bracket, 1 at thermostat housing, and 2 on the belt side of the engine

Any help would be appreciated! This car is driving us crazy and I just really want to know what is wrong with it

 

Is it possible the place we got the used tranny from, is giving us the wrong year transmission? Everything looks physically the same

 

Unlikely, all versions of the Honda H5 transmission are more or less interchangeable (assuming the front bolt pattern is the same). Given your car is a 2007 there were only a few interchangeable H5 transmissions which will bolt up, and they are all supposedly pretty reliable.

 

Dealership said there is No calibration or update or anything either to make it work....

 

Have you checked fluid level?

Does it have clean fluid?

How often was transmission serviced?

 

Fluid is Brand new, DW1 from acura. transmission service records I dont have. Was told it's a JdM one and should have around 60k....but this exact issue is happening with 2 different transmissions. So it's not an internal trans issue

Anyone know anything about the wheel speed sensors, and if the PCM uses those signals to output for the correct gear?

 

Dealership thinks the Japanese car the transmissions are coming from, may use a different computer

 

And that matters because?

 

TL was not sold in japan.... therefore probably some american trans with the JDM label. Is the torque converter being changed also? With the problem occuring in 5th gear, there may be something wrong with the wire harness that controls the 5th gear function/pressure switch or solenoids.

 

Yes torque converter was changed with both JDM transmission . So that's not the problem...
I'm not exactly sure how 5th gear is controlled....i know that there is 2, 3 and 4 pressure switches. And I have the table that shows what pressure switch should be on and off. And that's all showing its working

 

I would think that if the trans is identical and I use all my US sensors and switche . It should work with my US Pcm

 

@Sundj01 Did you figure out what was the issue? I'm having the same issue as well using the jdm transmission.

 

Wondering if I can get some help. I recently had my transmission rebuilt on my 2008 acura tl (Auto trans). Before the rebuild i had abs/transmission fault codes the mechanic showed me. After the rebuild by transmission doesn't slip but lags in shifting gears from time to time. Also getting a P0767 code (shift solenoid D is stuck on) now my question is, is my pcm faulty or did something happen to the solenoid inside? How can i figure this out. If anyone can help i would really appreciate it.

p.s 112K miles on the car before the rebuild. and no check engine lights or any other lights on dash.

 

Yes....I replaced ecu with good one from dealer, replaced wire harness with used good one, swapped the solenoids around between the 3 trannies I ha . No matter what I did I still got the EXACT codes and driving symptom .
My conclusion is the 2 JDM trannys i got. Dont work in the US 2007 TL
the car is still running and driving great. You just have to drive it in manual mode and never go into 5th gea . And it will never skip a beat

 

We had the same issue with our TL. Had shop rebuild the very first tranny. After his rebuild, he kept getting the solenoid d stuck o . That tranny shop could never figure out why....that's when we bought the Jdm ones and got screwed that way.....
But you may have a different circumstance. You could pop off the solenoids and change them. Or swap them around to see if that's your issue. You could also take off the single and double solenoids that are under the air box. Pull the tubes with screens out. They could be clogged....and make sure theres good o rings and gaskets sealing those solenoids

 

Did you ever get this problem solved? Having the exact same issue.

 

Have the same issue with jdm transmission second on same problem. It’s just the wrong transmission stay away from jdm. I install a us transmission problem solved

 

Did you ever solve the problem?