1994 850 auto tranny shift lock

sdma00 · Post by **sdma00** » 22 Nov 2006, 13:00

Howdy from Miami ,Fl!..I have a 94 850 non turbo with 135K miles. I am experiencing intermittent transmission shift lockup , where I can't take it out of park.I have to use the override button to shift out. Works fine one day , then not the other. Any ideas?

Q#2- what to do about squeekie brakes, ried multiple brands to no avail !

Post by **billofdurham** » 22 Nov 2006, 15:42

Q1: Could be the PNP switch playing up. Try moving the shift lever from P to L 15 - 20 times quickly. This can clean up the copper contacts inside the switch.

Q2: Have you got shims in? I usually give the backs of the pads a good coating of copper grease. It has worked on every Volvo I have owned.

Bill.

CarVolvo · Post by **CarVolvo** » 22 Nov 2006, 19:21

the shifter might need what bill suggested.. the pnp switch.. or its the micro switch inside the shifter that needs help!

Squeeky back brakes are common on these cars.. shims or lots of smurf (the blue stuff) antisqueel paste on pad replacement would help!

sdma00 · Post by **sdma00** » 22 Nov 2006, 21:39

billofdurham wrote:Q1: Could be the PNP switch playing up. Try moving the shift lever from P to L 15 - 20 times quickly. This can clean up the copper contacts inside the switch.

Q2: Have you got shims in? I usually give the backs of the pads a good coating of copper grease. It has worked on every Volvo I have owned.

Bill.

I will try these ideas in the next few days.

Rule .308 · Post by **Rule .308** » 22 Nov 2006, 22:59

Don't forget the ignition contact plate, I see just as many of them go bad as anything else. The next time it duplicates try wiggling the key in the ignition a little bit. You may find that it needs to be turned back towards you just a little bit, otherwise it could be the brake pedal switch or the micro switch but if memory serves me correctly the PNP does not play a role in the shift lock circuit.

Mark

sdma00 · Post by **sdma00** » 25 Nov 2006, 12:19

I have checked all the micro switches with a meter , they seem to be ok, I did the P to L 15-20 times bit with no results. All indications point to the shift lock solenoid , although I still have not ruled out the steering and brake pedal portion of the problem. Anyone have a good place to buy used or new inexpensive parts in the States?

CarVolvo · Post by **CarVolvo** » 25 Nov 2006, 14:20

fcpgroton or vlvworld