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NV4500 Swap ???

Discussion in 'Manual Transmission & Clutch' started by 83K5guy, Jan 17, 2011.

  1. HotRodPC

    HotRodPC Administrator Staff Member

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    I don't beleive its that hard. Just a matter of sliding the pedals out of the mechanism that hangs the pedals from the steering column if its similar to a 60's vehicle and I think it is from what I have been able to tell.
     
  2. davbell22602

    davbell22602 Full Access Member

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    I have a NV4500 service manual in PDF format. If you it I'll put on my file sharing site with link and start a new thread for it.
     
    Last edited: Feb 4, 2011
  3. 83K5guy

    83K5guy Full Access Member

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    I found a sm 465 with a np205 guy says it comes with a hydraulic bell housing upgraded 32 spline outputs and 1410 yokes says 700 obo and it's a twin stick tcase. Now it's a 4 speed and I'm guessing it's low, 1,2,3
     
  4. HotRodPC

    HotRodPC Administrator Staff Member

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    Yeah, that a Granny Gear 4 speed. $700 seems a bit high to me for used. I could see it if it were NV4500 and he wanted $700. The NP205 is the better tcase, and I am sure he's thinking its gold.
     
  5. HotRodPC

    HotRodPC Administrator Staff Member

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  6. 83K5guy

    83K5guy Full Access Member

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    Well he told me he think he might keep it and I would rather have the 4500 for cruseing with the od so I'll keep looking. I found one on cl but it exspired the next time I was able to get on. It was out of an Ifs 3/4 ton so idk what I would do about the t case being the driveshaft on the left and mine is currently onthe right
     
  7. 83K5guy

    83K5guy Full Access Member

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    What would need to be done if possible to make a 2wd nv4500 to mate to a tcase or not worth the money
     
  8. Corpse

    Corpse Full Access Member

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    not to thread jack... but im trying to piece together the same swap in my 83 K5 Blazer except i have the 6.2 Diesel in mine.

    i found a sight that sells complete transmissions with all swap required pieces in a kit(except pedal assemblies)

    http://www.high-impact.net/transmission_and_gear/nv4500_gm82-93diesel.htm#Automatic

    lil expensive but gives some good info!

    -------

    onto my question, how do i tell what transfer case i have?

    and

    internal slave vs extrenal slave nv4500? i was thinkin for a DIY backyard mechanic like myself an external would be better for repair and diagnosing problems
     
  9. kleedus

    kleedus Full Access Member

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    this truck currently has a 93 or 94 nv4500 in it i swapped it in using all gm parts bolt in.
    the way i did it it was easy as just changing the tranny and t case

    i used the 93 or 94 bell housing nv4500 and the t case from a 85 and up sm465 208 combo. it bolted right in place of the 241 t case originally on the nv4500.

    my truck is a 85 so it had the dimples in the fire wall for the clutch master cylinder.
    and i took the clutch pedals out of a 87
    i used the 93 master cylinder i had to slot the holes in the mounting plate and it bolted in but the rod has to be modified to hook up to the clutch pedal.
    i built a adjustable one but do not like it.
    i used the sm465/208 cross member

    i will be putting the nv4500 in my crew cab with a 205 using a 90 round pattern 205 from a a 90 sm465/205 combo. it should bolt up just the same as the 208 did

    if you use the 93 style bell housing you should have at least 6'' lift
    the slave cylinder is on the pass side and the drive line could hit it with less than 6'' of lift
     

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    Last edited: Feb 9, 2012
  10. crazy4offroad

    crazy4offroad Service Bullshit Filter Soon

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    Good info, Ray!
     
  11. Irishman999

    Irishman999 Full Access Member

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    If I would have read this last week I doubt I would have spent hours wrestling the boat anchor around and just done this swap. SM465's are cool but I would rather have more gears and quicker shifting.
     
  12. kleedus

    kleedus Full Access Member

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    i have had that truck running for about 2 years and have had no problems at all

    the best tip i can give any one doing this is to put a new seal in the t case to keep tranny oil in the tranny and t case oil in the t case.
    the nv4500 uses a certain oil and if that seal lets the oils mix it will destroy the nv4500 fast

    and there is a updated double lip seal that is what i used and any time i have it apart i will put a new one in.
     
  13. crazy4offroad

    crazy4offroad Service Bullshit Filter Soon

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    Yeah .75:1 5th gear is appealing to me right now, with 5.13s I'm running 3,000 rpms at 55mph.
     
  14. HotRodPC

    HotRodPC Administrator Staff Member

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    Very True on the NV4500. There is only 3 part #'s for the fluid to use. 1 is a GM part #, 1 is a Dodge part #, and the other is a Castrol part # who makes the oil for the GM and Dodge also.
    75W-90 Castrol Syntorque Synthetic
    Mopar Synthetic Manual Transmission Lubricant Mopar P/N 4974459 (Material Specification 9070)
    GM Goodwrench® Synthetic Manual Transmission Fluid (GM Part No. U.S. 12346190, in Canada 10953477)

    DO NOT CONFUSE THE CASTROL BRAND. There is another fluid called something like Synchromesh or something of that nature, and its very common for someone to install that instead of SynTorque. It has to be the Syntorque in the Castrol Brand. Those are the ONLY 3 oils safe to use in NV4500.
     
  15. BB-Flo33

    BB-Flo33 Junior Member

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    Ok, first post in a new forum, I have fixed cars professionally for about 10 years but haven't done too many conversions like this.

    My current favorite toy and daily driver is an '84 K5 Blazer, pulled out the 305 put in a 350, long pipe headers, 3" exhaust with an x-pipe that sits right under the front u-joint of the rear driveshaft into two Flowmaster 50 Series Deltaflows that sit vertically then over the rear axle around the fuel tank and out the side at an angle, factory installed SM465, 4x4 of course, NP 208 t-case, and too much in the plans to list except I'm looking to convert to the NV4500 for the overdrive.

    I read in this thread that the NP 208 t-case will bolt right up which answered one of my questions, but I do have a few more?

    -Is there a bellhousing with drivers side slave cylinder that will work with my truck and the NV4500? And does anyone know where to find one? I picked this tranny because I read somewhere in my initial research that it will basically bolt right up.
    -I have found out that the transmission case and extension housing of the NV4500 is 18.9 in long. The SM465 is approx 20.5 in long for the same measurement. Does anyone know the overall length of a NV4500 from the front of the bellhousing to the back of the extension housing/front of the t-case? I will measure my SM465 to include the bellhousing tomorrow. I am trying to find out if I need some sort of spacer or am I looking at modifying/replacing my driveshafts.
    -Is there anyway to modify my clutch pedal to work with the master cylinder for the hydraulics or am I going to need to replace the clutch pedal?
    -I want to keep the shift lever I have now to keep the original look. Does anyone know if the shift lever for the SM465 will work in the NV4500 or am I looking at having this modified?

    That's all I can think of right now; I will probably have more questions later. Thanks,
    BB-Flo33
     

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