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Help with th 200-4r in Mazda RX-7

This is a discussion on Help with th 200-4r in Mazda RX-7 within the Automatic Transmission forums, part of the Drivetrain category; To make a long story short... i have a 93' RX-7 with a 3 speed th350 tranny conversion. Drove AMAZING!!!! ...

  1. #1
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    Vintage Red
    1993 Mazda RX-7

    Help with th 200-4r in Mazda RX-7

    To make a long story short... i have a 93' RX-7 with a 3 speed th350 tranny conversion. Drove AMAZING!!!! for awhile, transbrake iand ratchet shifting s def a new experience... recently the car began to shake like crazy. AFter taking it to KDR i found out the bell housing is cracked damaged fairly bad. Basically Im planning on buying a new tranny that will hopefully bolt up to the same custom adapter plate thats on there right now. I was told its a B.O.P. (Buick, olds. pontiac) th350.

    I'm posting on this site because there seems to be a much greater knowledge of these trannys around here.

    Questions:

    - I want another gear for the highway, is a TH 200-4r A direct swap for a th-350?

    - Do you recommend solid mounting the trans on the body? or should you use some kind of bushing?

    -I have a custom built edge racing torque convertor.. Would the same one work for an th 200-4r?

    - Does anyone have a built up Th 200-4r for sale for a decent price?
    I've seen them on the internet for ~$1700 but I'm a current student and hope I can find one with at least a stronger casing for under $1000.



    I want to get my car back moving ASAP!! so any help would be greatly appreciated!!




    SUSPENSION
    R1 Front Strut Tower Bar
    Tokico Shocks (5-way Adjustable)
    H&R Springs
    RaceShop Roll Bar
    Toe Links (not installed yet)
    Trailing Arms (not installed yet)
    RX7.com Diff Bushings
    Diff. Brace
    KAAZ 1.5 LSD

    DRIVETRAIN
    TH350 Transmission (fully built, w/ Trans Brake)
    5500 Racing Torque Convertor (Edge Racing)
    B&M Pro Ratchet

    ENGINE

    SS Downpipe
    SS Midpipe
    Racing Beat Catback
    Pettit AST
    Race/Street Port (HUGE)
    88 High Compression Rotors
    Racing Seals
    180 Thermostat
    Silicone Hose Replacement
    XS Engineering T04E Single Turbo (Garrett)
    Cast Ductile Iron Exhaust Manifold
    HKS Racing Wastegate with 50mm valve
    A'PEXi Twin Chamber Blow of Valve
    K&N Air Filter
    M2 Large (Racing) intercooler

    FUEL SYSTEM
    1600cc Secondary Injectors
    KRD Fuel Rail
    Supra TT Fuel Pump
    Aeromotive FPR

  2. #2
    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    TH350 to 2004R is a direct bolt in replacement. Same length transmission and same driveshaft. Trans mount is a little further back so you need to relocate the trans crossmember/trans mount.
    Converter isn't the same.
    And no you shouldn't solid mount the trans to the body. thats probably how you cracked your TH350

  3. #3
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    1993 Mazda RX-7

    Thank you for the response!

    I didn't solid mount the trans but the shop that did the conversion told me they did in order to keep the driveline from moving.

    What type of mounting do I need then? Will the ability for it to move damage the spline gear that connects to the engine? (sry I dont know the correct terminology)

  4. #4
    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    The engine and trans will be mounted solidly together and then mounted to the chassis with rubber mounts. The engine and trans will rock around as one piece.

  5. #5
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    Vintage Red
    1993 Mazda RX-7

    Could the movement in the driveline damage the gears in my KaZZ 1.5 LSD?

    Any other suggestions/tips on making this 350 to 2004r conversion work?

  6. #6
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    Vintage Red
    1993 Mazda RX-7

    bump Please anything that will help me put a 2004r in my MAZDA!!

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