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4-speed upgrade to 5-speed

Discussion in 'Chevy C/K Truck Forum' started by Stubblejumper, May 1, 2012.

  1. Stubblejumper

    Stubblejumper New Member

    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. 07XCSB

    07XCSB Active Member 2 Years 1000 Posts

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

    Stubblejumper New Member

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

    Boonduff Member 3 Years 100 Posts

    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.

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