1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

swap nv4500 into 1986 k30, 454,465,205

Discussion in 'Manual Transmission & Clutch' started by mhjohn2, Jul 11, 2014.

  1. mhjohn2

    mhjohn2 Junior Member

    Posts:
    5
    Likes Received:
    0
    Joined:
    Jul 2, 2014
    Location:
    San Jose, CA
    First Name:
    Mike
    Truck Year:
    1986
    Truck Model:
    K30
    Engine Size:
    7.4
    Hi I am entertaining swapping a new post 1996 GM NV4500 into my 86 k30 454, single rear wheel, std cab, orig came with SM465, np205, 4:10 gears,
    10.5" 14 bolt rear axle, factory hyd clutch.
    I will use the AA bell housing and brackets. What year transmission mount should be used and will my stock cross member work with minor mods? What mods? I will have the drive shafts modified at south bay driveline san jose.
     
  2. kleedus

    kleedus Full Access Member

    Posts:
    1,719
    Likes Received:
    51
    Joined:
    Jan 25, 2012
    Location:
    wyo
    First Name:
    Ray
    Truck Year:
    1960 threw 91
    Truck Model:
    c10 to k30
    Engine Size:
    350 threw 454
    I put a 94 nv4500 in my 85 I used the 94 bell housing master and slave cylinders.

    I had to slot the master cylinder mounting holes and it bolted up. can't remember if I had to enlarge the hole in the firewall or not. I had to make the rod that connects to the clutch pedal.

    I used a 208 t case and the stock cross member from a 87 sm465 the one with the long tail shaft and 32 splines no modifications at all it was a bolt on.

    I am not sure but I think your 205 and cross member should work.
    your 205 should be the round pattern with 32 spline input. the only thing I am not sure about is the length of the input on the 205.
     
  3. HotRodPC

    HotRodPC Administrator Staff Member

    Posts:
    44,454
    Likes Received:
    4,197
    Joined:
    Aug 29, 2010
    Location:
    OKC, OK
    First Name:
    HotRod
    Truck Year:
    85
    Truck Model:
    Silverado K10 to K20 Conversion
    Engine Size:
    6.2 to Gas???
    The NV4500 will not fit the SM465 bellhousing. Most guy go ahead and use an NV4500 bellhousing. I've also heard that a machine shop can open up the center hole just a tad and the NV4500 will then fit into the SM465 bellhousing. But I'd verify that and the bolt pattern too. Maybe it's the Dodge NV4500 that needs the different bolt pattern. Different year model NV4500's make a difference too.
     
  4. SquareRoot

    SquareRoot Full Access Member

    Posts:
    365
    Likes Received:
    311
    Joined:
    Mar 18, 2017
    Location:
    Arizona
    First Name:
    Mike
    Truck Year:
    85
    Truck Model:
    K20
    Engine Size:
    350
    Reviving this thread cuz I gotta a question.
    Hopefully somebody has the answer.

    Can I swap the th400 in my 85 K20 with a nv4500 without driveline mods?

    I'm assuming the 208 t-case bolts directly to the 4500? They are both 32 spline but I'm lost on input shaft lenght/adapter issues.
     

Share This Page