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dropped tranny

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12 comments

  • 1911a1-fan
    put a can of lucas in it, and keep going till it dies
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  • slipgate
    I think the 700r4 and the turbo 350 interchange fairly easily - you can pick those up for a few hundred. 700r4 will be a lot more. Doubt you really need the overdrive.
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  • Horse Plains Drifter
    Yep, THM350 or THM400 will interchange in pretty easy.
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  • cahas
    This truck is an 85 K-10 4wd,so i assume its a 700r4.Its pretty much dead, the fluids like mud.Ill see if i can find one of the older model trannys.Much appreciated,Cahas
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  • JustC
    I thought 85 had a 350turbo??
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  • cahas
    A friend said it was a 700.I dunno,ill check with a mechanic Monday.
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  • slipgate
    If it has overdrive ("D" with a circle around it), it is probably a 700r4, if not, a 350.
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  • 76k20
    This is the reason I switched to a manual tranny. I replaced five TH350 in less than a year, never again. brothers car is currently down due to a 700r4/4l60. I told him the tranny sucks!! GM quit using the TH 350 (in 1/2 tons only, 3/4 and 1 tons still used TH400's up till 91 I think) I believe in '82, replaced it with 700r4 after. 700r4/4l60 are the biggest pieces of junk GM ever put in a vehicle!!!
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  • dcloco
    Umm...nothing interchanges between any of the transmissions mentioned.

    TH350 - to install one in your vehicle...you would need a 4x4 version of this tranny (special - needs to be built - output shaft is different - which is the SECOND piece installed when building the trans). Different mounting plate, different kickdown (your 700R4 has a TV cable..close..but not the same as a kickdown)

    TH400 - would be a good move for you...but it will be spendy. Same thing as the TH350 - different output shaft and mounting plate. NO kickdown cable...but...now you will need a kickdown SWITCH and wiring for such.

    700R4 - can easily be built to withstand whatever you throw at it. But, you will have to spend some money ...in the 1800-2000 area.


    TH350 could handle whatever you need as well..but...have to spend the money on it - 1000.

    TH400 - spend a little money on upgrades...$25...but good luck finding one.
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  • LOKO383
    quote:Originally posted by dcloco
    Umm...nothing interchanges between any of the transmissions mentioned.

    TH350 - to install one in your vehicle...you would need a 4x4 version of this tranny (special - needs to be built - output shaft is different - which is the SECOND piece installed when building the trans). Different mounting plate, different kickdown (your 700R4 has a TV cable..close..but not the same as a kickdown)

    TH400 - would be a good move for you...but it will be spendy. Same thing as the TH350 - different output shaft and mounting plate. NO kickdown cable...but...now you will need a kickdown SWITCH and wiring for such.

    700R4 - can easily be built to withstand whatever you throw at it. But, you will have to spend some money ...in the 1800-2000 area.


    TH350 could handle whatever you need as well..but...have to spend the money on it - 1000.

    TH400 - spend a little money on upgrades...$25...but good luck finding one.


    exactly,..all very true points to ponder..well said DCLOCO...[^]..Loko
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  • jabronij3
    quote:Originally posted by slipgate
    I think the 700r4 and the turbo 350 interchange fairly easily - you can pick those up for a few hundred. 700r4 will be a lot more. Doubt you really need the overdrive.

    may have to change the driveshaft linkage should work you will be in low gear where the indicator shows 2nd
    oh btw the 700r4 is a piece of crap
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  • EVILDR235
    You are going to need a transfer case that matches whatever tranny you wind up using.The transfer case will also need to have the same ratio as your present one.I assume you have a married unit.
    EvilDr235
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