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What gears should be stock for a 73 Sub?

Discussion in '1936-Present Suburban' started by chvyhs, Nov 12, 2002.

  1. chvyhs

    chvyhs 1/2 ton status

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    A friend of mine has a 73 and he's not sure what gears he has. It doesn't do too bad considering it has 39.5" Boggers. Just checking to see what he should have, I'll get him to pull the diff cover one of these days. /forums/images/graemlins/burb.gif
     
  2. ken

    ken 1/2 ton status

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    Either 4.10, 3.73 or 4.56 in that order (first one most common). The 44 front end should have a metal tag attached to one of the cover bolts that has the ratio on it....like 41-10 = 4.10 etc. I would say you need at least 4.56s with 39.5s and a small block. When I had my "small" 39.5" Swamps with 4.10 gears and 454, it was doggy...I can't imagine that with a 350! /forums/images/graemlins/burb.gif
     
  3. ken

    ken 1/2 ton status

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    Oops!!! My last post assumed that this '73 you are talking about is a 3/4 ton...is it??? If it's a 1/2 ton, and there are any gears left in the rear 12 bolt due to the 39.5" tires, then stock would be 3.07s...3.73 & 4.10s were optional.
     
  4. chvyhs

    chvyhs 1/2 ton status

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    I should have mentioned it is a 1/2 ton.
     
  5. ken

    ken 1/2 ton status

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    That little 12 bolt must look positively petite under there, what with the 39.5" Boggs!!!! /forums/images/graemlins/grin.gif
     
  6. FLASHLIGHT76

    FLASHLIGHT76 1/2 ton status

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    That is a scarry thought /forums/images/graemlins/eek.gif I can't imagine running such large tires on such a small axle. Maybe I'm just spoiled My bet will be 373's If he is on 39's with a 350 and he can turn them, then they are probly 373's. 410's would give some power but not much. I run 410 with 35's and my acceleration itsn't that great but isn't that bad. figure its got to be worse with 39s.
     
  7. chvyhs

    chvyhs 1/2 ton status

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    Thanks for the info, you should see how much I trimmed his fenders. /forums/images/graemlins/thumb.gif
     

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