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Help! What ratio are my k10 axles?

Discussion in 'Differential & Driveline' started by AlexK10, Aug 1, 2020.

  1. AlexK10

    AlexK10 Full Access Member

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    Truck Year:
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    305
    I already have the rtv, so 7$ less. And last time I had the covers out I welded drain bungs, how easier can it be.:boxed:

    Yeah its basically new gear oil with less than 50 miles on it for both front and back diffs; because I've been working on the engine and trans, which are done now and that's why I'm paying attention to the diff.

    Ok I've wasted everyone's time by being lazy... I thought I would get a definite answer but in reality the only way to make sure and not buy the incorrect ring pinion set would be to POP THE COVER!:biggun:

    Have some other stuff in the pipeline that goes before this, like install a horn and get the wipers working again. Therefore this will have to wait a few more weeks.
     
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  2. Craig 85

    Craig 85 Full Access Member

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    454/TH-400/NP205
    In case you didn't know here's how to read the ring once the cover is off. This is for a '70 Chevelle.

    Part #: GM 3862526
    Gear ratio: 10 41 = 4.10 (FYI 11 41 would be a 3.73)
    Date of Manf: 3 70 = 03/1970

    [​IMG]
     
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  3. The88

    The88 What's broken this time?

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    Could always buy 2 sets of 4.10s then no need to count anything.
     
  4. The88

    The88 What's broken this time?

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    Damn double
     
  5. AlexK10

    AlexK10 Full Access Member

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    Will get to this later than sooner since I have house projects to tackle for the next months.

    However, I know how to go about this now, POP THE COVER! When I get back to this Ill post again and give updates.

    Been thinking that if my gears are good... All I may need are seals, bearings and a crush sleeve eliminator to get the clearance correct to get rid of the clunk when I shift to reverse or drive.

    I only drive this truck a few miles on the weekend, less than 20 miles per week, so slight wear on the gears may be acceptable for a beat up rusty truck. Its not a daily driver, not a show truck, just a truck I use to carry stuff and eventually will use to launch a 16-17' lumberyard skiff.
     
    Craig 85 likes this.
  6. 80BrownK10

    80BrownK10 Full Access Member

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    Or unless someone swapped the axles over the years. Maybe the rear is an original 2.76bor whatever and they left the front an original 3.08?
     
  7. Rusty Nail

    Rusty Nail Whatever!

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    You gotta jack up the opposite side dude...the axle is turned around.
    :waytogo:

     
    Last edited: Aug 9, 2020
  8. AlexK10

    AlexK10 Full Access Member

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    So for the rear I did leave one tire on the ground being an open diff but for the front I need to raise both sides?
     
  9. Rusty Nail

    Rusty Nail Whatever!

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    You just gotta jack up the other side. The driver tire is the front drive wheel. The passenger front is the spinning wheel.

     

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