[V8] narrowing down the cause of tranny limp home mode

[Dave Head]

Be willing to bet the TCC (torque converter clutch) solenoid is sticky 
or needs replacement. You have to pull the valve body to clean it. As I 
recall you can replace the solenoids w/o pulling the valve body.

Got any friends that do auto trannies???

z1sales at z1auto.com wrote:

>The other night we drained the tranny fluid and refilled it with 4 quarts per the lists
>recommendations.  What I now notice is that when the car is cold, it seems to shift at least 1-2-3
>without issue.  It will also downshift into a gear if you press hard enough on the accelerator
>(something it does not do when it goes into limp mode).  After you drive it for a few miles, it
>goes into limp mode.  If you shut the car off and restart, sometimes it will go back to shifting
>ok, sometimes it won't (I assume a hard code vs a soft code).
>
>If it is of any importance, when it does shift, it shifts fine - very smooth, very quick.  This is
>the same with up and downshifts.
>
>Today I tried to pull the main ecu as well as  the tranny ecu in a hope to reset any hard codes,
>but within a few miles of leaving the office, the limp mode came back.  It shifted ok for the few
>couple miles, stopped for a red light, and immediately upon accelerating again, the limp mode was
>back.
>
>Any further insight into what this might be?  Any reason it would shift 1-2-3 but not 4? 
>Thanks guys!
>
>Adam
>Z1 Performance
>www.z1auto.com
>631-863-3820
>
>
>
>
>Adam
>Z1 Performance
>www.z1auto.com
>631-863-3820
>
>  
>
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