1999 Oldsmobile Silohoutte
3.1L V6
SES codes = p1811
tech = sf
question = slipping when shifting from 1st to 2nd gear.O.K. after warms
up.I took it to a Cottman transmission dealer and the code was
p1811. They said they would have to do a software rebuild--clutches and whatever
else. Will tis take care of the problem? NO check engine lite came on
ever.


SF:
Yes, most likely the clutch plate material has come apart on the 2nd clutch assembly.
P1811 is component slipping.
Trans. would have to come out and disassembled.
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When starting out in the morning sometimes transmission don’t want to shift from second to 3rd.  
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Answer: This sounds like a common problem on that year
Oldsmobile. There is a service bulletin for this problem.
Chips or debris plugging the bleed orifice of the 2-3 shift solenoid.
This will cause the transmission to stay in 2nd gear when 3rd gear
is commanded and return to 1st gear when 4th gear is
commanded. A 2-3 shift valve (368) or 2-3 shuttle valve (369) that
is stuck, restricted and/or hung-up in its bore. This condition may
also be an indication of a damaged 2-4 band or 3-4 clutches. This
clutch damage may generate debris causing the 2-3 shift valve
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are going to have to have a transmission Tech look at it and do
some preliminary diagnosis to see if this is your problem.
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