But they tried awfully hard to convince us to get a rebuild which was declined. Cottman's which is also AAMCO here charged around $600 with the part. Cost will vary depending on where you live. You'd probably want to take it a specialist like a transmission shop. Or your idea on how I should go about this. If I ask a mechanic to change the PCS pressure control Silinoid, how much would be a good price to go by as to what I should be charged? So, I am assuming the has come down to changing the PCS. And today it did great, until it started again. I bought a pint of Seafoam, followed the directions, added the whole pint. Possibly a good work around for people having PCS issues or re-ocurring PCS issues. So far no problems to date and the shifting is excellent. Used the Wallyworld Supertech brand Dexron VI for $3.00 per quart since another fluid drain will be performed in about a month. Topped it all off with the new Dexron VI. Then I added a a shift kit which was installed in the 1-2, 2-3 accumulator which can be accessed from underneath. The AC Delco TF304 screen filter is identical by the way and in reality a Filtran brand in Delco packaging. Ran it for a couple of weeks and then did a pan drop with a new Filtran screen filter. What we did was add the Seafoam to clean it out.
This is to be expected due to tranny fair wear and tear and clutch pack material wearing away. 65 seconds causing the P1811 DTC to set and commanding high line pressure (max) and as a result the hard upshifts and in some the whining sound. The LeSabre was one of my test vehicles, a total of 3 GM cars with the 4T65E autotransaxle in which I ran a GM Tech II scan tool and found the shift timing was out of eater than. However, at around 135K miles the hard shifts and the P1811 DTC (max adapt, long shift) returned. Then around 125K miles when we had Cottman's replace the PCS solenoid. On this particular LeSabre the first pan drop service with new Dexron III ATF and screen filter was done around 70K miles. Just goes to show that the Seafoam does work but I don't think it should be left in the tranny for any extended period of time.