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  1. #1
    WTS
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    1988 Red Coupe

    Default 88 Vette 4 Speed to 6 Speed Transmission

    Has anyone converted a (4) Speed Doug Nash W/OD to a MN6 (6) Speed Transmission. Any problems with drive shaft, Bell Housing, Digital Instrument Cluster etc?

  2. #2
    Member JonM's Avatar
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    84 Coupe

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    Just tossing you a couple pages to look at about Richmond...

    http://www.areddy.net/vettetrans/


    http://www.richmondgear.com/techdocs/

  3. #3
    WTS
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    Corvette(s)
    1988 Red Coupe

    Default 88 Vette 4 Speed conversion

    Quote Originally Posted by JonM
    Just tossing you a couple pages to look at about Richmond...

    http://www.areddy.net/vettetrans/


    http://www.richmondgear.com/techdocs/

    Thanks for the information !

  4. #4
    Technical Writer for Internet & Print Media
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    It's possible to replace the Doug Nash with a ZF but not only must you change the trans but you also have to change the rear axle. The ZF won't work with the 3.07 ratio in an 88 manual.

    The beauty of the Richmond six-speed is that, if you use Richmond's conversion kit (designed to put the ROD in a C4 originally equipped with the Nash), it's basically a bolt-in operation.

    The downside is that while the Richmond is a pretty darn good aftermarket six-speed (I have one in a 71) it's not the refined gearbox that is the ZF S6-40.
    Hib Halverson

  5. #5
    WTS
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    Corvette(s)
    1988 Red Coupe

    Default 88 Vette Transmission Conversion

    Quote Originally Posted by Hib Halverson
    It's possible to replace the Doug Nash with a ZF but not only must you change the trans but you also have to change the rear axle. The ZF won't work with the 3.07 ratio in an 88 manual.

    The beauty of the Richmond six-speed is that, if you use Richmond's conversion kit (designed to put the ROD in a C4 originally equipped with the Nash), it's basically a bolt-in operation.

    The downside is that while the Richmond is a pretty darn good aftermarket six-speed (I have one in a 71) it's not the refined gearbox that is the ZF S6-40.
    Thanks for the information, I was hoping to not have to replace any more of the drive train than just the transmission.

    Regards WTS

  6. #6
    koolaid117's Avatar
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    1990 ZR-1 #312 **SOLD**

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    Someone here did the six-speed switch with that tranny and posted a link to their site. He documented the whole thing. I looked at the site, but I can't remember who it was. I'm sure someone will check this on Monday or Tuesday and give you the correct info.

    Good luck!!

    Jim
    Life's too short to be unhappy.

  7. #7
    WTS
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    Corvette(s)
    1988 Red Coupe

    Default 88 Vette Transmission conversion

    Quote Originally Posted by koolaid117
    Someone here did the six-speed switch with that tranny and posted a link to their site. He documented the whole thing. I looked at the site, but I can't remember who it was. I'm sure someone will check this on Monday or Tuesday and give you the correct info.

    Good luck!!

    Jim
    Thanks Jim, I will look for more information !

    Regards WTS

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