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K5 manual 5-speed conversion Need Info

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by StNaegle, Feb 14, 2002.

  1. StNaegle

    StNaegle Newbie

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    I have a '85 ex-Army Blazer and want to install a 5-speed manual transmission. Is there a 5-speed that fits into the 6.2 Diesel Blazer, without any problems with the transfer case? also I would need the whole clutch assembly.
    I need to know which Truck was build with a 5-speed (or at least a 4-speed) that is transferable into the 6.2Blazer.
    any hint would be appreciated!!! thanks for your help!!!!
     
  2. dyeager535

    dyeager535 1 ton status Premium Member

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    No 5 speed is going to be a "drop in" since our trucks never got them. www.dorianyeager.com/index2.html
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  3. ArrowheadK5

    ArrowheadK5 1/2 ton status

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    Is this the 4-speed with L-1-2-3-R, or is it 1-2-3-4-r? Is there a difference or am I ignorant? (well, I know teh answer to that part, I guess.)

    "They couldn't hit an elephant at this dist..."
    - General John Sedgwick (1813-1864), last words
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

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    Well, my shift knob shows L123R, but no matter, in order of gears, its has the 6.55:1 "1st", then 3 something 2nd, etc. There were some "car" 4 speeds put in the trucks, but I've only seen one, and they look NOTHING like the SM465, nor do they ahve the "granny low"

    No external shift linkage on the 465, but I think the 420 is very similar, haven't quite figured out how to tell the diff easily. www.dorianyeager.com/index2.html
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  5. Oblin Goblin

    Oblin Goblin 1/2 ton status

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    I've got a nv4500 (5 speed) in my '84 Diesel right now. The nv4500 was used in '93 and up 3/4 and 1 ton chevy pickups. There are other 5 speeds (nv3500, getrag) that would work but those generally aren't strong enough to be worth the trouble. You would need a clutch master assembly from an '80's body style truck. It's a pretty pricey conversion but if your serious about putting a 5 speed in your Blazer I've got tons of advice for you. I won't be able to repond until next Monday though cause I'll be out of town.
     
  6. ben794X4

    ben794X4 Registered Member

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    I have the sm465 and wanted to do the nv4500 conversion but found that a lift and 35s will do about the same thing for a third of the cost. At least thats how it works out on paper I'll be doing the lift and tires in the begining of march so well see.

    79 4x4 k5 stock
    3spd granny stock 350
    12 bolt open rear
    10 bolt open front
    Subvert the accepted paradigm.
     
  7. Sparky87k5

    Sparky87k5 1/2 ton status

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    My 87 had the SM465 and total cost of NV4500 swap including AA's bellhousing, hyd. slave cylinder, clutch and T/O bearing came to $588 plus $1935 for the new transmission from Sallee Chevrolet. Driveshafts were modified but this was done primarily due to D60 & 14BFF swap at same time as trans. NV4500 installations should not effect driveshaft lengths. With 456 gears, OD is nice for cruising. Floor boards will need minor mods due to 465's shift lever being mounted farther forward. 208 transfer case shifter needed to be moved back about 2". NV4500's shift MUCH nicer than 465's. Also a quieter trans too.

    87 K5, 427/340hp BBC,4.56 D60 & 14BFF, NV4500, NP208, TSM rear disc's,
     
  8. m j

    m j 1/2 ton status

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    why does it require an AA bellhousing?
    oddball input shaft length?


    formerly 77chev
    still a jerk though
     
  9. Sparky87k5

    Sparky87k5 1/2 ton status

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    There are no GM bellhousings that will bolt up an NV4500 and allow use of early model transfer case with front driveshaft on right side of engine. All IFS trucks have driveshaft on left side of engine. Clutch hookup isn't possible with late model bellhousing due to problems with driveshaft interference and clutch operation. That is why AA makes the bellhousing and gets $300+ for it.

    87 K5, 427/340hp BBC,4.56 D60 & 14BFF, NV4500, NP208, TSM rear disc's,
     

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