Volvo RWD 700 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 6/2010 700 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




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

745 won't go into overdrive? 700 1988

posted by  Siguesigue on  Sun Jun 5 09:16 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed Sep 19 11:55 CST 2007
[RELATED]

Sigue (88 745GLE, automatic) has decided that he won't go into overdrive on the freeway. Travelling at 4500rpm to keep up with traffic is annoying (though it's easier to pass!). Nothing seemed to telegraph this--I just noticed one day that the revs were too high at 45mph, and it's been refusing to upshift since then. Tranny fluid is clean and at the proper level. Pushing the overdrive button does nothing but make the light come on and off. Am I correct in guessing that this is a symptom of the O/D solenoid going bye-bye, or is it something more ominous?

If it is the solenoid, is this a DIY fix, or is it better to let a shop do it?

TIA for any advice, as always!







  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    745 won't go into overdrive? 700 1988

    posted by  someone claiming to be Steve on  Wed Jun 8 17:20 CST 2005 [RELATED]

    sound like the overdrive senser, uner maniflod 2inx2in bof bolted to block has a wire as well with a clip,..... check this out








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    745 won't go into overdrive? 700 1988

    posted by  crank it up on  Mon Jun 6 03:03 CST 2005
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Sat Nov 10 05:24 CST 2001
    [RELATED]

    Pull the switch out and check the wires there. Some times they break right at the switch. I had that happen a few years ago on my first 240.








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

    745 won't go into overdrive? 700 1988

    uid 18083's pic
    posted by  lucid on  Mon Jun 6 00:05 CST 2005
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Oct 24 12:31 CST 2014
    [RELATED]

    This might help isolate the cause....

    OD operation involves 5 components and the wiring that connects them...

    1) Fuse 11 (200) or 12 (700/900) supplies voltage to items #2, #3, #4, and #5

    2) The Shifter button/switch (turns OD relay off and on)

    3) The OD relay (controls Upshift Arrow light and Solenoid - separate wires)

    4) The Upshift Arrow light (ON means relay and OD are OFF)

    5) The OD solenoid (Allows OD engagement when ON, the "default" Relay state at Key On)

    If the Shifter switch makes the Arrow light (#4) go on and off, then items 1, 2, and 3 are OK, and the problem is most likely the undercar wire to the Solenoid (#5) or the wire connector terminal.

    Less likely would be be Solenoid itself.
    Also possible (but very unlikely) would be the relay controlling the Arrow light (#4) correctly, but failing to activate the Solenoid.
    An internal transmission problem is also possible.

    ========>
    ...consider this recent reply to a "check the wiring" suggestion:

    "Replaced corroded connector and length of wire with bad insulation. Working perfectly now."

    He was having "intermitent" OD failures, was sure it "couldn't be wiring" (that would be "all or nothing"), and was probably on the way to a solid failure.
    <========
    --
    Bruce Young
    '93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    745 won't go into overdrive? 700 1988

    posted by  crtanner on  Sun Jun 5 14:14 CST 2005
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Tue May 11 09:07 CST 2010
    [RELATED]

    I just bought a 745 with a similar problem. Based on FAQ, I pulled OD relay and checked solder. Couldn't see anything wrong but went ahead and ran the solder lines with an iron since FAQ referenced cracked solder. Presto OD worked and continues to work. A real cheap fix.
    Chuck







<< < > >>



©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.