1997 E300D Trans Rebuild: Valve Body/TCM Mismatch?
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1997 E300D
1997 E300D Trans Rebuild: Valve Body/TCM Mismatch?
After being stranded with a P0730 code ("incorrect gear ratio) and being shown significant metal in the pan, I had my 722.6 transmission re-built by a local shop. The rebuild transmission has some odd behavior, which the shop attributes to a mismatch between a new valve body and the old TCM (Transmission Control Module?).
The behaviors:
NB: I may be confusing TCM and TCP (control plate), but I don't think so. I'm out of my limited depth though. ;-)
Thanks for any light you all can shed. Particularly user MAVA in Sacto. (I'm in Oakland).
The behaviors:
- 3-5 sec delay before dropping into forward or backward gear progression.
- Reluctance to upshift to higher (3,4,5) gears in hard (freeway onramp) acceleration. Counter-intuitively, if I pull back a bit on the accelerator, the upshifts will occur. If I just keep the pedal down (but not enough to engage the downshift switch) the engine simply races and acceleration fades as I move beyond above the power band.
- Upon stiff braking, or sometimes a quick lift off the accelerator, hard downshift bumps from 2->1.
NB: I may be confusing TCM and TCP (control plate), but I don't think so. I'm out of my limited depth though. ;-)
Thanks for any light you all can shed. Particularly user MAVA in Sacto. (I'm in Oakland).
