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  1. #1
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    Corvette(s)
    1984 Gunmetal Met

    Default 1984 "4+3" overdrive "console switch"

    Hello Folks,

    I've read most of the posts, including those from Ken . . . have the shop manual but still can not figure out how to remove the 1984 "4+3" overdrive "console switch" .

    Again this is for a 1984, and not a 1985, whereas the overdrive switch is located on top of the shifter.

    In advance, thanks . . .
    DUKE

  2. #2
    Member douglas foster's Avatar
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    Corvette(s)
    1984 C4 Gold coupe, Z51, 4+3 manual, BBS rims,

    Default hi

    On my 84 the switch is located on the consoule next to my drivers window switch. Whats wrong with yours?Click image for larger version. 

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  3. #3
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    Corvette(s)
    1984 Gunmetal Met

    Default

    Quote Originally Posted by douglas foster View Post
    On my 84 the switch is located on the consoule next to my drivers window switch. Whats wrong with yours?Click image for larger version. 

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    Doug,

    Wow super clean 84' you have . . .

    I have no power to my overdrive, the overdrive light does 'not' come on, nor is there overdrive in 2-4th. I replaced the overdrive relay, on the firewall, there's (2) relays there, one for the fuel pump (I did not replace) then the overdrive (replaced) is the one closest to the valve cover (is that correct)?

    Still no overdrive light on the dash nor no overdrive in 2-4th.

    I've taken a look at overdrive "switch", located on the console next to the 4sp shifter - it looked real clean (have 34K miles on the car), but for the life of me, I was unable to determine how to remove or test the overdrive "Switch" - any thoughts here?

    Thanks . . .
    DUKE

  4. #4
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    Corvette(s)
    1984 Gunmetal Met

    Default

    Making progress . . .

    With the battery disconnected:

    Without removing the overdrive "connector", I was able to remove the (2) screws holding the overdrive "switch", whereas I could attach an ohm meter to the (2) contacts at the rear of the overdrive console "switch".

    Then I flipped the overdrive 'switch", the ohm reading went from .000 to 000.3, then dropped to 000.2 then to 000.1

    Comments please . . .
    DUKE

  5. #5
    Member douglas foster's Avatar
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    Corvette(s)
    1984 C4 Gold coupe, Z51, 4+3 manual, BBS rims,

    Default

    What about the overdrive solenoids attached on the transmission. there should be 3 of them, and they are the troublesome ones.
    Good luck

  6. #6
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    Corvette(s)
    1984 Gunmetal Met

    Default

    Quote Originally Posted by muskiemike View Post
    Making progress . . .

    With the battery disconnected:

    Without removing the overdrive "connector", I was able to remove the (2) screws holding the overdrive "switch", whereas I could attach an ohm meter to the (2) contacts at the rear of the overdrive console "switch".

    Then I flipped the overdrive 'switch", the ohm reading went from .000 to 000.3, then dropped to 000.2 then to 000.1

    Comments please . . .
    Making progress, but still no power:

    Just tested, with the battery connected, and the ignition "ON", the motor not running, performed a voltage test at the "overdrive toggle "switch" to see what volts are there?

    When I flipped the overdrive toggle switch to "ON", there were NO volts at the overdrive switch.

    A week ago I checked the "gage" (overdrive) fuse in the fuse box, and it looked good, so I did not change it out.

    Your thoughts?
    DUKE

  7. #7
    Member douglas foster's Avatar
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    Corvette(s)
    1984 C4 Gold coupe, Z51, 4+3 manual, BBS rims,

    Default

    You have a problem with the power supply wire. It could be the fuse,or a break in the power wire some place.
    Maybe run an auxiliary power wire from battery to switch just to see if when you turn switch on it feeds power to rest of system?

  8. #8
    Member WhalePirot's Avatar
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    Corvette(s)
    1984 White Z-51/ZF6-40/Shinoda body

    Default

    Easy enough to probe for 12v on both sides of that fuse, versus a visual OK.
    409 cid four bolt, forged crank/11:1/alum. Dart Pro-1/FMS-30pph@45 psi/BBK 52mm/'90 ECM Custom chip/Lingenfelter SuperRam/Comp Cams hydr. roller 230i-236e@050 /TPIS long tubes 3"/'84 Corvette cat/Flowmasters/ BeCool rad./FlowTech water pump/180* 'stat/3.54:1 rear gears +case cryo hardened/Bilsteins: 'Challenge' specs/Heim jointed rear suspension; all poly/ZF6-40 by ZF Doc//I.M.I. mini-starter/Battery inside/Electric HydroBoost brakes/FatMatted/Shinoda body/updated PwrWindows

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