14 Bolt 3rd member swap Q

Discussion in 'Chevy C/K Truck Forum' started by Jake2670, Nov 17, 2013.

  1. Jake2670

    Jake2670 New Member

    I have a 84 dually that PO swapped the 4.56 gear for he said a 3.54, but I'm thinking after a tow the other day its even higher. My Q is, I have a Military single 14 bolt with 4.56 (should be), are they the same 3rd member? Also, if memory serves, can't I just pull 3rd member n not have to setup gears :) PO at same time of gear swap had shop put a NV4500 n, so I don't see any prop with highway running at 80? anyone running 4500 with 4.56 on 265/75s 5th at present is pretty much worthless, truck has 6.2L with banks kit.


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    I know, its a carrier, not a 3rd member, but still, no one going to say anything ???
  2. MrShorty

    MrShorty Epic Member 5+ Years 1000 Posts

    I am not an expert on setting up gears, but I know that you will need to swap out both the ring gear and the pinion gear to change gear ratios (ring and pinion are considered a matched set and should always be changed together, if my understanding is correct). I don't see any way, even using used parts, to change the gear ratio without going through the process of setting up the gears.
  3. Crawdaddy

    Crawdaddy All hail the Mad King!! Staff Member 5+ Years 1000 Posts Platinum Contributor

    You will definitely have to re-set the gears.
  4. Jake2670

    Jake2670 New Member

    yeah, was thinking 14 was like ford 9, but another group said 14s r easier to setup ?? anyway, the other part was, whats diff between the SRW n DRW 14s

    thanks guys,

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