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how to read the R&P?

Discussion in 'The Garage' started by vw62rag, Nov 29, 2005.

  1. vw62rag

    vw62rag Registered Member

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    hello this may sound dum but im tryin to figure out what size R&P i have on some axles i have and some may get. is there a tech area anyone knows of online that has this info? i have a D44 with a BOM that reads 603455 ( i dont have the numbers off the ring gear yet ). and i have a 14B rear end that has GM 327722 10 41 5 84 on the ring gear, and a 10B rear end that has 2 GM 123512 6 13 40 12 84 on the ring gear. please help
    thanks!
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    GM 327722 10 41 5 84

    Last two groups of numbers are the date code. This diff was built in May 84. The two groups before the date code are the gear ratio. This diff has 10 pinion teeth and 41 ring gear teeth. 4.10's.

    2 GM 123512 6 13 40 12 84

    This diff built Dec 84, 13/40 (3.07's)

    HTH

    Rene
     
    Last edited: Nov 29, 2005
  3. vw62rag

    vw62rag Registered Member

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    thanks rusty! but how did you get 3.07 out of 13/40? and is there a way to tell what gears are in a axle by the BOM? (i mean i know they could have been changed but im jus tryin to find out what came with it from the factory) i have a D44 with BOM 603455
    thanks again
     
  4. dremu

    dremu Officious Thread Derailer Premium Member

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    It's a ratio, 13:40 ... or in this case, 40:13 ... 3.07:1.

    Yes, your BOM likely will tell you ratio... but I can't find any good lists for '44's, sorry.

    -- A
     
  5. vw62rag

    vw62rag Registered Member

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    darn.....thanks for the help tho!!!! anyone else know?
     

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