Posted by ribbitt on March 03, 2008 at 07:59:50 from (66.57.79.123):
Apologize for the OT, but I need your wisdom here. My 93 Bonneville started acting strangely a while back. The torque converter locks up and unlocks nicely in response to commands from the PCM, but two things seem a bit strange to me. First is that lockup only occurs above 38 mph, while the shop manual says it should happen around 28 mph. Not a real big deal. More importantly, it unlocks at any speed when the accelerator is at the idle position. I would think it should stay engaged above some speed, say maybe 45 mph. All that locking and unlocking at highway speeds seems excessive to me. What do you all think? BTW, I replaced the TPS, and it still does the same thing. Vehicle speed sensor (VSS) seems to be correct. No codes in the PCM....
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