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2WD Gearbox Question UPDATE 12/22/06 0900HRS

Discussion in 'The Garage' started by CDA 455, Dec 21, 2006.

  1. CDA 455

    CDA 455 3/4 ton status

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    I just got my '68-72 2WD gearbox from LMC Truck for my crossover steering set up and I want to make sure it's the right one (2WD vs. the 4WD unit).

    Does it use the same/similar housing as the 4WD unit?

    Can anyone post some pics of each?

    The reason for this is I'm currently dealing with a screwed up order from a few weeks ago with LMC Truck and I guess: 'A burnt Dog Dreads Fire'.

    I just want to make sure I don't bolt the thing up, get the fluid in, purge the air bubbles, only to find out it's the wrong one!

    Thanks guys :D !

    UPDATE (Dumb) QUESTION:

    I have a '72 CST K5 Blazer. What year(s) 2WD PS box can I use for my cross over steering?
    The reason why I'm asking is because after getting info from you guys, I checked my PS box that LMCTruck sent me and the sector shaft is as described.
    HOWEVER! When I looked at it I noticed that when I positioned it as it would be mounted, the mount tabs were on the wrong side :mad: :( !!! Like a Ferd PS box would be. WTF?!
    Are there any Chevy PS boxes mounted like Ferd's would be (on the inside of the frame rail)??

    Thanks guys.
     
    Last edited: Dec 22, 2006
  2. lurtch-k20-(78-90)

    lurtch-k20-(78-90) Registered Member

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    A quick way to tell buy looking is the 2 wd pitman arm shaft will have teeth cut atw around it, except on four sides 90* apart it will apear that the valley of two teeth didn't get cut, this is for 90* clocking of the pitman arm shaft.

    The 4wd shaft will have a slot cut out (perpendicularly??? I think thats right $$the spelling$$$) to the shaft about .375 about 1/2 way between both ends, on the opposite side of the shaft, a 1/4 of it will have teeth cut on it. Sorry no pics i'm at work.
     
  3. BizeeB65

    BizeeB65 1/2 ton status

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    in simple terms... on a 4x4 box, the shaft is splined part of the way around it, and on a 2wd shaft, there are splines all the way around the shaft with 4 "keys" at the 12:00, 3:00, 6:00, and 9:00 positions.
     
  4. CDA 455

    CDA 455 3/4 ton status

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  5. lurtch-k20-(78-90)

    lurtch-k20-(78-90) Registered Member

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    I was wondering if the pitman arm shaft out of a 2wd F**D '79 RV would fit in my '79 k25 4wd sterring box, it appears both boxes are siginaw, the F**D box is inside the frame, while mine is outside framrail. wondering if anyone has done this or im pssn in the wind.
     
  6. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    an s10 steering box is the same size as a full size box, but they mount on the inside of the frame. maybe thats what you have.

    post some pics of it and we could help identify it.
     
  7. lurtch-k20-(78-90)

    lurtch-k20-(78-90) Registered Member

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  8. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    If you have flare fitting lines you need any TRUCK 2wd box from 1967-1979 or 1980 first design. The CAR box mounts on the inboard side of the frame rail.
     

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