2000 Buick Century with intermittent transmission surges while changing gears.
A local mechanic read the computer codes and determined a P1811C code but checked Step 11 of the AllDataPro readout.
Inspect transmission for the following:
* 203 accumulator piston seals rolled
* 2-3 accumulator piston and pin missing
* oil pump assembly damaged
* spacer plate and gaskets damaged
… etc.
P1811 is the Maximum Adjust and Long Shift code on Buick. What does the “C” add? And, does the Step 11 indicate actual internal damage?
I have been advised that there’s a gasket easily replaced on the side of the transmission with the Maximum Adjust code, but I’m wondering if this test indicates there’s internal damage and a total repair is needed. Thx.