The mystery about transmission hard shift is finally revealed (TSB for HARSH 2~3, 3~4 OR 4~5 UPSHIFT)

[Hammad]

Hi Husam,
I’ve the same issue with my 2017 3.8. When the engine is cold, jerk is a lot more compared to when it’s running in 2-3 and 5-6 gears, is it the solenoids only or something else?

 

[Husam]

Hi Husam,
I’ve the same issue with my 2017 3.8. When the engine is cold, jerk is a lot more compared to when it’s running in 2-3 and 5-6 gears, is it the solenoids only or something else?

If you have not replaced the transmission fluid, do it first. If this does not fix it then you have two more possible causes :

Two solenoids to be replaced
Valve body needs to be replaced


Thank you

 

[Sparty]

I have a early 2012 5.0 8speed. Purchased used from dealer, ran smooth. I buy it and next day going to work 50mins away and getting into city traffic, I have horrible hard shifts and shift flares. I have on my list to do is replace all 6 solenoids, new filter pan, add fresh fluid to existing old and not to flush. Drain and replace diff fluid. Is there anything else I'm missing?

 

[Husam]

I have a early 2012 5.0 8speed. Purchased used from dealer, ran smooth. I buy it and next day going to work 50mins away and getting into city traffic, I have horrible hard shifts and shift flares. I have on my list to do is replace all 6 solenoids, new filter pan, add fresh fluid to existing old and not to flush. Drain and replace diff fluid. Is there anything else I'm missing?

If the valve body is clogged with debris, it will not be cleaned until you rebuild the valve body or replace it.

 

[Sparty]

If the valve body is clogged with debris, it will not be cleaned until you rebuild the valve body or replace it.

What valve body are you referring to? Im not sure I follow

 

[Husam]

What valve body are you referring to? Im not sure I follow

I was referring to the Transmission Valve body assembly.

 

[Sparty]

What are the part numbers for the new solenoids? I want to make sure I buy the new version and not the old. I'm guessing it's same number as old part but ends with 2 instead if 1?

 

[Husam]

What are the part numbers for the new solenoids? I want to make sure I buy the new version and not the old. I'm guessing it's same number as old part but ends with 2 instead if 1?

I'm not sure about your car model since it's make is 2012. But for 2015 year, the new parts are:

46313-4E702
46313-4E602

They may or may not fit. You have to validate those with the dealership.


Thank you