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    Triumph Spitfire Overdrive Unit

    Rimmer Bros, For all of your Car Parts & Accessories. Triumph Spitfire Overdrive Unit and more, fast delivery, worldwide.
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    GridItemIDItem InformationPart No.AvailabilityPriceOrder Qty
    4176Overdrive Unit - J TypeOverdrive Unit - J TypeRKC684RIn stock
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    Most orders placed now ship next business day!
    £391.67 ex VAT (Business & Non EU)   £470.00 inc UK VAT£350.00 ex VAT (Business & Non EU)   £420.00 inc UK VAT
    Product Description

    Triumph Spitfire Overdrive Unit
    J Type Overdrives
    Important Information
    Which Models have J type overdrive?

    MkIV Spitfires from FH60001

    All MkIVs were fitted with the 3-rail type gearbox.

    Spitfire 1500s
    All UK spec 1500s were fitted with the single-rail type gearbox. However, because USA specification vehicles had the 1500cc engine sometime before the UK and other export countries. It is possible that there are some re-imported 1500s that have a 3-rail type gearbox fitted as standard.

    Are they the same overdrive unit? No.
    Are all the parts interchangeable? No.
    Are the Adaptor Plates the same? No.

    Although outwardly they appear the same (as are the vast majority of components), overdrive units for the 1500 (with single rail gearbox) were fitted with a much improved Oil Pressure Relief Valve system, which cannot be fitted to the original spec. MkIV J type overdrive used on a 3-rail type gearboxes. Also, due to the different gear selector system and gear level mounting, 3-rail type gearboxes and single rail type gearboxes each have their own specific overdrive to gearbox adaptor plate.

    Can I fit a 1500 unit to a MkIV?
    Should I fit a MkIV unit to a 1500?

    Our reconditioned (exchange) J type overdrive units are suitable for both single rail and 3-rail type gearboxes, but you must use the correct gearbox adaptor plate.

    Reconditioned exchange overdrive units are supplies less solenoid, output flange, adaptor plate & speedo drive.

    Customer Comments
    "Quick and easy site to use, good to know they are on the net , many parts all in one place, will be using them again and will recommend to others." Customer Comment March '17