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14 bolt tone ring

Discussion in 'The Garage' started by Hardcore, Jan 22, 2004.

  1. Hardcore

    Hardcore 1/2 ton status

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    Does anyone know what year chevy started putting a tone ring in the 14 bolt for the speedometer.

    Will the carrier out of a late model 14 bolt (with tone ring) fit into an older 14 bolt?

    /forums/images/graemlins/ears.gif
     
  2. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    I didnt even know GM had tone rings on the carrier. And its for the ABS. GM has their sensors on the wheels.
     
  3. u2slow

    u2slow 1/2 ton status

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    I've seen 14FF's through to '00 and none had a tone ring (all were drum brake type).

    Maybe this started with the discs? /forums/images/graemlins/thinking.gif
     
  4. HarryH3

    HarryH3 1 ton status Author

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    GM uses a tone ring at the output of the transfer case to drive the speedo. Tone rings at each wheel are used for 4-wheel anti-lock brakes.
     
  5. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    [ QUOTE ]
    Tone rings at each wheel are used for 4-wheel anti-lock brakes.

    [/ QUOTE ]

    I meant to say for ABS, oops!
     
  6. Confedneck

    Confedneck 3/4 ton status

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    even if you swapped the carriers (which you wouldnt since gm doesnt use tone rings on the carriers according to these guys), youd still have to drill and tap the housing EXACTLY where and how GM would have done it, to mount the speed sensor..
     
  7. u2slow

    u2slow 1/2 ton status

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    Many of GM's 4-wheel ABS systems used only three sensors - two front wheel sensors, and the VSS. Rear-wheel ABS used the VSS only.

    Have things changed with the 99-up Silverado/Sierra trucks?
     
  8. HarryH3

    HarryH3 1 ton status Author

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    [ QUOTE ]
    Many of GM's 4-wheel ABS systems used only three sensors

    [/ QUOTE ]
    Dang! When did they cheap out? My '91 S-Jimmy has the tone rings at all 4 wheels.
     
  9. zcarczar

    zcarczar 1/2 ton status

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    The trucks have use 3 Sensors for as long as I can remember. Its just easier, cheaper and probably lasts longer on a work truck to have 3 sensors instead of 4 at all 4 wheels.
     
  10. u2slow

    u2slow 1/2 ton status

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    [ QUOTE ]
    Dang! When did they cheap out? My '91 S-Jimmy has the tone rings at all 4 wheels.

    [/ QUOTE ]

    The first few years of 4-wheel ABS (91-93?), S-Jimmy, S-Blazer, Astro, and Safari got sensors on all 4 wheels.

    My guess is measuring individual rear wheel speed on a RWD is poor criteria for the ABS computer. Whereas the front wheels could lock-up individually depending on the traction.

    I'm sure it was a cost saver to do away with them. /forums/images/graemlins/wink.gif
     
  11. HarryH3

    HarryH3 1 ton status Author

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    Yeah, the ABS on this one sucked anyway. I disabled it years ago as it would pretty much turn the brakes OFF when trying to stop quickly on a bumpy road or loose gravel. /forums/images/graemlins/angryfire.gif
     
  12. Hardcore

    Hardcore 1/2 ton status

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    So there was never a tone ring put onto the carrier of a 14 bolt, even the late models? The reason I'm asking is that a friend of mine wants to run a 14 bolt on his newer Dodge which uses the tone ring in the pumpkin for the speedo/odometer/ and tranny shift points. /forums/images/graemlins/ears.gif
     
  13. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    Correct, no tone ring.
     

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