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Thread: Auto trans

  1. #1
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    Auto trans

    Hey guys, I’ve picked up a working auto here in Australia for a box of beer, problem is I don’t know what it is. I know it came out of a Buick just not sure what. I’ve put a picture of the I’d tag, can anyone help let me know what it is and what they were like. It is supposed to be a 4speed....


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  2. #2
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    Looks like a THM400 out of an 1985 Cadillac. That would be a 3 speed. 85AA
    Larry

    1970 GS455 Stage1 Race weight 4025 lbs.
    TSP 470, 602 HP, 589 TQ
    MT headers, Gear Vendors Overdrive
    Best E.T. 11.54 Best MPH, 116.06
    1998 Riviera SC3800

  3. #3
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    When I click through the gearshift on the side of the box Larry, seems to have 7 positions
    P R N D 3 2 1
    Do you know if there is a site about BOP transmissions


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  4. #4
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    Quote Originally Posted by 53Roadmastercoupe View Post
    When I click through the gearshift on the side of the box Larry, seems to have 7 positions
    P R N D 3 2 1
    Do you know if there is a site about BOP transmissions


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    Its a GM transmission. The only thing BOP about it is the bell housing. This page may help. Look at the pan shape and count the number of pan bolts. The picture of the tag you posted looks like a THM400. Maybe it is a 4L80E? Does it have a vacuum modulator? A bigger electrical connection? Post a picture of the entire transmission and pan.

    http://www.700r4transmissionhq.com/g...dentification/
    Larry

    1970 GS455 Stage1 Race weight 4025 lbs.
    TSP 470, 602 HP, 589 TQ
    MT headers, Gear Vendors Overdrive
    Best E.T. 11.54 Best MPH, 116.06
    1998 Riviera SC3800

  5. #5
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  6. #6
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    Quote Originally Posted by 53Roadmastercoupe View Post



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    That looks like a THM2004R. It has 16 pan bolts. AA is a Cadillac transmission.

    TH-200-R4 ID's:
    ID Year(s) Application
    KZF ** Olds 442/Hurst
    CZF ** Monte SS
    BRF ** GN/T-Type/Turbo Regals
    OZ ** Hurst Olds
    OM Olds 350 Diesels
    OG Olds 307
    BY V-6 252 Cars
    AA and AP Cadillac's
    Larry

    1970 GS455 Stage1 Race weight 4025 lbs.
    TSP 470, 602 HP, 589 TQ
    MT headers, Gear Vendors Overdrive
    Best E.T. 11.54 Best MPH, 116.06
    1998 Riviera SC3800

  7. #7
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    Quote Originally Posted by 53Roadmastercoupe View Post



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    Looks to me like a 200-r4 Larry, would you agree?


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  8. #8
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    Yes, see my previous post.
    Larry

    1970 GS455 Stage1 Race weight 4025 lbs.
    TSP 470, 602 HP, 589 TQ
    MT headers, Gear Vendors Overdrive
    Best E.T. 11.54 Best MPH, 116.06
    1998 Riviera SC3800

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