Volvo 850 S2 Transmission Solenoid Replacement w/Pics

[cn90]

Can someone post PNs for the Solenoid(s)?
Cost?

[woodsytf]

http://transpartsdirect.com/
this site has them for roughly $25 each.
part #'s 6843784 & 6843783

[csbrianp]

Many of our transmission problem stem from bad radiators. Once the radiator breaks water leaks into the transmission causing the transmission to shift funny or stop drive altogether. I changed my shift solenoids but no change in performance. I ended up changing the transmission which today for a 850 is around $400 give or take a $100. If you decide to change the transmission be sure to change the pump seal before installing the new transmission. Trust me on this, no fun removing transmission twice.

Brian

[mecheng]

I know two guys that had close to 500,000km on their auto 850s with just regular fluid changes. I think maybe some of the failures are from lack of fluid changes. Never heard of a solenoid problem with the 4spd. 5sp most definetly.

[polskamafia mjl]

Any word on if the transpartsdirect.com solenoids are any good?

Also, what size are the torx bolts on the transmission cover?

[polskamafia mjl]

Another question; The SL solenoid is part # 6843784. S1 and S2 supposedly are the same part number (6843783) but I've heard that S1 and S2 are actually different. Any word on this from those who have replaced these solenoids?

[polskamafia mjl]

Ordered the SL, S1, & S2 solenoids from transparts. We'll see if S1 & 2 really are the same.

[woodsytf]

They appear to be the same solenoid with a different mount/bracket and connector position. the mounting bracket and connector position are important, once you get under the cover.

[polskamafia mjl]

Hmm...where can I get the correct solenoids or how do I modify the incorrect bracket? I wonder why the part numbers are the same in that case.

[woodsytf]

Let me look for my old receipt.
I don't think there is any way to modify the bracket, it's a pretty tight and precision fit, if I recall correctly. The solenoids replace fairly easily, after you get through everything else you need to loose or remove to get to them...