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Shake rattle and roll.............'86 MGM 5.0

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  • gadget73
    replied
    yeah it was probably sucking air and the clutches were chattering. Very not good.

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  • friskyfrankie
    replied
    Low trany fluid will do that....

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  • Toploader
    replied
    Well today I had the car out on a 100 mile run. I have to say that since the addition of almost 3qts of tranny fluid the car does not shake rattle and roll when I stomp the gas to go into passing gear.
    Also no more trans slipping

    Leave a comment:


  • gadget73
    replied
    yeah its very much like a 200R4 / 700R4 cable. Why they didn't stick to it I don't know, its a much better design than the stupid plastic bushing that fails.

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  • GM_Guy
    replied
    General Motors switched to that style end sometime in the late 70's, maybe early 80's for their tv and kick down cables.
    Attached Files

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  • gadget73
    replied
    nope. One year only setup. This is the cable, on the throttle body side its basically just a a piece of round stock sticking down with a groove cut into it for the cable to slide over.

    https://www.2040-parts.com/tv-cable-...able-i1092256/

    I may be a bit biased but I really think it was a better design. No stupid plastic thing to fail and nuke the transmission, and it doesn't require taking anything apart to adjust it. Just pull the release and move the cable.

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  • friskyfrankie
    replied
    Yeah, I couldn't remember if the 86 has the grommet or not. 87 does for sure but I guess the 86 does not?

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  • gadget73
    replied
    86 does NOT have a bushing. Not sure why I was thinking he had an 87. Not like it was in the title that I obviously read closely or anything.

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  • kishy
    replied
    I'm thinking misfire while in the higher gear which doesn't happen once in the lower gear (typical as high load at low rpm is where misfires happen most).

    Getting these things to not do that is tricky in my experience. I cure it (and other things I can't stand about these cars) by adjusting the TV so high they're probably in danger of blowing seals. TecNickal recently drove my 85 and would surely vouch for it not driving like an AOD at all.

    Check plug gap & condition, distributor rotor contact condition, and wire routing. If this is not a long-time symptom it is probably ignition stuff getting just slightly out of optimal condition.

    Leave a comment:


  • Toploader
    replied
    Originally posted by DerekTheGreat View Post
    It indeed does, the TB (throttle body) is the thing where the throttle blade, IAC valve and all throttle linkage stuff lives. Does it have a misfire? When is the last time you peered under the skirt of the distributor cap or checked the plugs & wires?
    My bad yes indeed it has a TB! Car never misfires, and when I stomp it the car does not miss or break up upon acceleration. Plugs are two years old, wires good.

    Leave a comment:


  • Toploader
    replied
    Originally posted by friskyfrankie View Post
    Does not an '86 have the grommet I mentioned? If so (which I believe it does) then get the brass one and pin to replace it with. 2.5 qts of trany fluid is a lot. Are you sure it required that much? If you are sure, either someone serviced it low or you have a leak. Proper level will eliminate that issue as a problem (as long as no leaks are present). Let us know how it runs!
    When I get the car on the lift I will check the two fittings at the trans that comes from the radiator cooler tanks. The pan is dry. I have not checked the dipstick in two years;-(

    Leave a comment:


  • VicCrownVic
    replied
    Originally posted by DerekTheGreat View Post
    It indeed does, the TB (throttle body) is the thing where the throttle blade, IAC valve and all throttle linkage stuff lives. Does it have a misfire? When is the last time you peered under the skirt of the distributor cap or checked the plugs & wires?
    He means no TB grommet for the TV cable at the TB. '86 was the one year only setup that didn't use that junk bushing setup.

    Lithdoc, when he was still here in MI, had his TV cable sticking on his '89 MGM, lubed it and was fine. Not sure exactly how or what he lubed though, think it was just the trans end of the linkage. Make sure your TV cable is moving freely.

    Leave a comment:


  • DerekTheGreat
    replied
    Originally posted by Toploader View Post
    There is no TB its an '86 5.0 EFI, I also added 2.5 qts of tranny fluid.
    It indeed does, the TB (throttle body) is the thing where the throttle blade, IAC valve and all throttle linkage stuff lives. Does it have a misfire? When is the last time you peered under the skirt of the distributor cap or checked the plugs & wires?

    Leave a comment:


  • friskyfrankie
    replied
    Does not an '86 have the grommet I mentioned? If so (which I believe it does) then get the brass one and pin to replace it with. 2.5 qts of trany fluid is a lot. Are you sure it required that much? If you are sure, either someone serviced it low or you have a leak. Proper level will eliminate that issue as a problem (as long as no leaks are present). Let us know how it runs!

    Leave a comment:


  • Toploader
    replied
    Originally posted by Brown_Muscle View Post
    Does it shake before or after it shifts? Could be a motor mount, driveshaft out of balance. does it stop shaking when it up shifts again, or just gas related?
    Shakes just before it shifts,then smooths out.

    Leave a comment:

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