5speed swap

Discussion in 'Transmissions' started by GTZ71, Nov 16, 2019.

  1. GTZ71

    GTZ71 Newbie

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    So here’s what I’ve done so far the motor and trans are out of the truck. I plan on a mild build like cam bore and valve springs that’s probably it. I really want to put a 5speed trans in it it’s got the 4l60e in it now. I just finished swapping a 4 speed in a 68 c30 that originally had the 3speed column shift it was very straight forward. I know that won’t be the case for my 98 I just want some advice I’m not against buying a whole parts truck (I’ve been wanting to do that any for nickel and dime stuff) but I didn’t know if it’d be easier to buy just a transmission. Here’s the trucks specs
    1998 GMC Sierra Z71 push button 4x4 half ton [​IMG]


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  2. Trigger_guard

    Trigger_guard I'm Awesome

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    Well,. I did my swap last year. And I went the route of buying parts separately. Here's the complete part list for a nv3500 swap.

    Transmission (obviously)
    Transfer case*
    Flywheel
    Clutch assembly
    Pilot bearing
    Slave cylinder
    Clutch master cylinder
    Clutch hydraulic line
    Clutch pedal and mounting bracket
    Brake pedal**
    Shifter


    *You can use your auto transfer case but you'll have to change the input shaft to the larger 32 spine

    ** You can cut down the factory pedal to fit the smaller rubber.


    It also takes a bit of wiring to get the neutral safety, reverse lights, and possibly 4wd sensors to work.

    Overall I spent about $1200 on the swap buying as many new parts as I could find.

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  3. eshaw

    eshaw Newbie

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    How about the ECM? Won't it throw a bunch of codes since it's looking for inputs from the A/T?
     
  4. Trigger_guard

    Trigger_guard I'm Awesome

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    Mine didn't. Other than having to bypass the neutral safety. The cruise control even worked. Although it won't shut off when you push the clutch, so you'll have to do it manually or tap the brake.

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  5. GTZ71

    GTZ71 Newbie

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    If you had to do it again what would you do?


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  6. Trigger_guard

    Trigger_guard I'm Awesome

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    Well. If I could find a whole truck for like $500, I'd go that route. But 5speed trucks are getting hard to find cheap. Buying everything separate is easier and takes half the work. Plus everything but the actual gearboxs are brand new.

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  7. Supercharged111

    Supercharged111 I'm Awesome

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    The NV3500 had a 32 spline output? I converted my push button case to 32 spline and while I was in there replaced shift fork pads and did a c clip eliminator.
     
  8. Trigger_guard

    Trigger_guard I'm Awesome

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    Yeah. All the manuals did.

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  9. Conman1181

    Conman1181 Newbie

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    I just finished converting my 1995 z71 to nv3500, and I cant get my speedometer to work. Even swapped the the speed sensor from the transfer case I know works. Any ideas? Thanks
     
  10. Trigger_guard

    Trigger_guard I'm Awesome

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    Only thing I can say is check the harness. It's easy to pinch a wire under the bell housing. Also check your grounds.

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