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np208 x-fer speedo gear

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by MA87K5, Nov 20, 2004.

  1. MA87K5

    MA87K5 1/2 ton status

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    Where can I get the driven gear that is on the output shaft on the np208? It is about 4" long. Thanks
     
  2. 84k5

    84k5 1/2 ton status

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    I got one a couple years ago from the dealership.
     
  3. MA87K5

    MA87K5 1/2 ton status

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    Unfortunately that's where I got the wrong gear. They gave me one for a 2wd 700r4. But I can always go back and talk to them again.
     
  4. BrianDamage

    BrianDamage 1/2 ton status

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    got mine from the dealer too

    I had to get the black gear...don't remember how many teeth

    I just found the box for it outside in the shop

    the GM part # is 1362048 for the black gear
     
  5. MA87K5

    MA87K5 1/2 ton status

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    I went to the dealer and they told me $180 for the gear. Way too much. I think I'll stay with the 7 mph faster reading.
     
  6. BrianDamage

    BrianDamage 1/2 ton status

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    [ QUOTE ]
    I went to the dealer and they told me $180 for the gear. Way too much. I think I'll stay with the 7 mph faster reading.

    [/ QUOTE ]

    he looked up the wrong thing. Go to another dealer...yours obviously doesn't know what he's looking for.

    Mine cost $7.

    What color gear/how many teeth are you calculating that you need ?
     
  7. MA87K5

    MA87K5 1/2 ton status

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    I come up with 15 gray
     
  8. BrianDamage

    BrianDamage 1/2 ton status

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    [ QUOTE ]
    I come up with 15 gray

    [/ QUOTE ]

    that's the drive gear right ? have you confirmed that's what is installed ? My 87 has the blue gear installed. The gear on the shaft is the drive gear, the gear that pulls out of the side (where the speedo goes in) is the driven gear.

    Then I just used this website to find what driven gear I needed (which was black for me )

    http://www.tciauto.com/tech_info/speedo_gears.htm

    they list thier part #'s, and the OEM #'s also

    that gear is only around $10 anyway not what the dealer quoted you


    the driven gear looks like this :

    [​IMG]
     
  9. MA87K5

    MA87K5 1/2 ton status

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    The drive gear is what I need. I believe mine was blue. How many teeth would that one have. The gear is bigger in diameter as well as length.
     
  10. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    Last edited: Nov 5, 2006
  11. MA87K5

    MA87K5 1/2 ton status

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    have you changed your driven gear, if so how accurate is your speedo? Did you need anything else to swap your driven gear?
     
  12. BrianDamage

    BrianDamage 1/2 ton status

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    [ QUOTE ]
    have you changed your driven gear, if so how accurate is your speedo? Did you need anything else to swap your driven gear?

    [/ QUOTE ]

    all I changed was the driven gear..mine is right on the money according to my GPS

    I have heard also it is better to actually measure the diameter of your tires, not just go by the rated size. I measured mine and it worked fine.
     
  13. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    I haven't changed mine yet , but your post made me check into mine , now I am going to get a 42 tooth gear to mate with my blue one /forums/images/graemlins/k5.gif /forums/images/graemlins/k5.gif
     
  14. MA87K5

    MA87K5 1/2 ton status

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    42T is the solution. Thanks for the help.
     

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