Volvo AWD 850 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 11/2000 850 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

Replacing solenoid valves in AT 850

posted by  Mr. Detail on  Tue Mar 25 04:03 CST 2003
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Mon Sep 8 11:44 CST 2014
[RELATED]

Apparently there are four solenoid valves in the 850's AT. They are as follows:
Solenoid valve "SL"= Regulates torque converter lock-up.
" " "S1"= Controls shifting.
" " "S2"= " "
" " "STH"= Controls transmission line pressure.

I am experiencing a hard, jolting start-up from 1st gear when the light turns green. I give it gas and then it pause for 1-2 seconds and then lurches forward.
I thought I might replace the two solenoid valves, "S1" & "S2" which may alleviate this problem. Has anyone ever done this and can I do it without removing the trans?

Thanks!








  REPLY TO THIS MESSAGE    PRINT   SAVE 

Replacing solenoid valves in AT 850

posted by  someone claiming to be Sam on  Tue Mar 25 06:10 CST 2003 [RELATED]

You need to lower the front half of the subframe to remove the valve body while supporting the eng/trans assembly. It's not really a difficult job IMO.
Will replacing those solenoids help? Don't know as you're guessing. It might be worth the gamble vs spending $1,600 plus labor to replace the trans otherwise. I assume you've flushed the ATF?







<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.