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NV4500 Diesel Vs. Gasser?

Discussion in 'The Garage' started by botboy, Apr 20, 2007.

  1. botboy

    botboy 1/2 ton status

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    Ok, so I'm debating whether I put a 465/205 behind my 6.5 in my crewcab, or spend the big bucks and put an NV4500 behind it.

    Doing a car-part search, looks like the NV4500 came behind a gasser and a diesel - what's the difference? Just a lower OD ratio, or what?

    Truck is an '80 C30 CCSB, originally a 350/TH400/2WD truck, when i'm done plan to have a 6.5 (Mech. PMD from '93 Cube van), banks kit, manual, 4x4 with a D60 up front....I got a lotta work ahead of me :D
     
  2. neverendingproject

    neverendingproject 1/2 ton status

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    No difference. Only difference was that 93-94 models, all of them, had a lower ratio. The only gearing differences in diesel vs gas is in the rear end.
     
  3. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    The diesel version has a harmonic damper inside. My NV4500 is a '95 diesel version.

    [​IMG]

    The big round thing on the back is the damper.

    Rene
     
  4. DEMON44

    DEMON44 Low-Tech Redneck

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    that must be a GM thing because my '98 Dodge nv4500 definately doesn't have anything like that.
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    It is a GM thing...and goes a long way to keeping 5th gear from coming loose.

    Rene
     
  6. DEMON44

    DEMON44 Low-Tech Redneck

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    that must be why the full splined mainshaft is the recommended Dodge fix.
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Maybe, I do know the cause is 5th gear rocking against the nut. Heavy load and the transition between throttle and no throttle puts a ton of rotational stress on the gear...and being that it's not full spline it eventually can develop a bit of a play. That rocking motion against the nut loosens it off eventually.

    The damper on the GM version sits between the nut and the gear.

    I did carefully check the mainshaft on mine for any signs of fretting and saw none...so I put it together using a stock replacement nut.

    Rene
     
  8. DEMON44

    DEMON44 Low-Tech Redneck

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    I stuck the updated pinch nut on mine, and welded it to the shaft. we'll see how long mine holds :doah:I've got fuel and air components coming to go over 600horse.
     
  9. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Cool (on the 600 hp part)

    My 6.2 will never be able to hurt the NV4500...;)

    Rene
     
  10. mosesburb

    mosesburb For Rent Premium Member GMOTM Winner

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    I believe the damper was a GM-only thing not specific to diesel. I have two NV4500's, one gas 6.34 and a diesel 5.61 and both have the damper.
     

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