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Need detailed info on manual conversion..Please!!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by ftn96, Mar 24, 2002.

  1. ftn96

    ftn96 1/2 ton status

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    I've searched and got some random info. But I have a 700 with fixed 241. I'd like to go 4500 adn keep the 241. But sounds like the 4500 will be very expensive. Truck is a 90 model. Can someone lay out my options here as far as the conversion keeping the 241 with a 465 or 4500 vs a different tcase with either tranny. Please please please!!!!!!!

    Also, Im looking to sell the TCI 700 to get the funds to sport the conversion. Its fresh outta the box from TCI.
     
  2. Sparky87k5

    Sparky87k5 1/2 ton status

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    The GM version 4500 you need will have a 32 spline output. 32 spline input 241's and 208's will bolt right up to the 4500. Your 241, having been bolted to a 700, will have a 27 spline input. Same applies to 465's. I know of only 4500 32 spline transmissions from GM. Possible that AA can help you with your 241.
     
  3. m j

    m j 1/2 ton status

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    sounds like you will be doing some TC work
    you could change out the input to 32spline to match a late 32 spline sm465
     
  4. ftn96

    ftn96 1/2 ton status

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    Im familiar with the break down of the 241. I've had it torn down 2 times already. So swapping the input shaft is no big deal. Just that Im scared to ask what a 32 spline input shaft will cost me.
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Actually, all you'll need is the 32 spline input and planetary. You should be able to re-use the shaft you have. Your shaft right now spins on a pilot at the back end of the planetary and is engaged using the shift collar.

    Rene
     
  6. ftn96

    ftn96 1/2 ton status

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    So when are you sending me the 32 spline input and planetary? /forums/images/icons/laugh.gif
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    LOL...that's the one part I really need. They are really easy to find though...look for any 89 and up IFS Chev 4x4 that came with the 5 speed tranny. They are all 32 spline input, but drivers side drop which doesn't make a difference to you. I picked mine up for $125.

    Rene
     
  8. ftn96

    ftn96 1/2 ton status

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    You dah man. Dont stop jacking your jaw. Keep the info coming.
     
  9. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    What more do you need info wise?

    Oh yeah, I've been told (take that for what it's worth...) that the factory NV 4500 bell won't work on our trucks because the clutch slave is on the passenger side and will interfere with the front driveshaft. I'm currently trying to modify a SM 465 bell to work with the NV 4500 cuz I'm a cheap bastard and I don't wanna pay for the Advance Adaptors bell./forums/images/icons/smile.gif
    The bearing retainer hole in both bell's is the same dimension so it will center the NV4500 correctly, but the mount holes are a little different.

    The shifter on the NV4500 is about 4 or 5" farther rearward than the SM 465 shifter so the factory hole in the tunnel will need to be modified some.

    That's about all I can think of right now.

    Rene
     
  10. DieselDan

    DieselDan 1/2 ton status

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    Would it be feasible to use a hydraulic throw/out bearing, thus elimintating the fork arrangment and utilizing the stock NV4500 bellhousing? Anybody have any experience with hydraulic T/O bearings? Aren't they used on late model "F" bodies?
     
  11. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I'm fairly sure Summit sells the hydraulic throwout bearings as well as aftermarket external slave cylinders. Either way will work...

    I haven't had a close look at the NV4500 bell to see if the slave mount would interfere or anything...

    Rene
     
  12. ftn96

    ftn96 1/2 ton status

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    Ok, now we're rolling. Lets keep it coming. Take over Rene! /forums/images/icons/laugh.gif
     
  13. m j

    m j 1/2 ton status

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    on the bellhousing, do the NV mount holes line up with flat surface of the bell or will you have to weld/fill before drilling and tapping?
     
  14. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I haven't got that far yet...I'll look tomorrow and post what I find. I expect I'll have to fill and drill a little bit.

    Rene
     

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