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  1. #1
    Jr. Apprentice
    Join Date
    May 2012
    Location
    Regina, Saskatchewan, Canada
    Posts
    10

    Default 4-speed upgrade to 5-speed

    Hello, everyone. New to the site - I just bought a 1988 C30 4 x 4 with 7.4 liter and 4-speed manual transmission. I'd like to swap out the 4-speed for a 5-speed with overdrive and wonder if anyone else has done the same.

  2. #2

    Default

    The NV4500 5spd is a good swap. Still gives you the granny low and a overdrive gear.

  3. #3
    Jr. Apprentice
    Join Date
    May 2012
    Location
    Regina, Saskatchewan, Canada
    Posts
    10

    Default

    Thanks. I'm presuming the NV4500 will work with my existing transfer case - will I need a new clutch and bell housing?

  4. #4

    Default

    Quote Originally Posted by Stubblejumper View Post
    Thanks. I'm presuming the NV4500 will work with my existing transfer case - will I need a new clutch and bell housing?
    I know it depends upon which transfercase you have. There was also several changes to the NV4500 over the years so it also matters which one you get. Give Advance Adapters a call @ 1-800-350-2223. They'll be able to tell which model years will swap the easiest and if any adapters will be needed.

    97 Chevrolet Suburban K1500 5.7L
    78 GMC High Sierra K1500
    Fat, drunk, and stupid is no way to go thru life.

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