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78 trailering special..What gears should it have??

Discussion in 'The Garage' started by y5mgisi, Oct 3, 2005.

  1. y5mgisi

    y5mgisi 1 ton status

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    My buddy picked up a 78 trailering special with stock 454 and th400 We are going to convert it to 4x but we need to know what gears are in it before he buys a front end. So is there a rule that says the 454 th400 trailer specials have a certain gear? or is it kinda more random than that?
     
  2. sweetk30

    sweetk30 professional hooker Premium Member

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    had a burb like that. was 3.42 stock.
     
  3. dremu

    dremu Officious Thread Derailer Premium Member GMOTM Winner

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    More random, especially after this many years. You really need to pull the rear diff cover and count teeth.

    Prolly came with 4.10's, but could have 4.56 or maybe 3.73.

    -- A
     
  4. txfiremank5

    txfiremank5 1/2 ton status

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    I agree that it's probably as random as any other truck. I had a 77 trailering Special, and it had 3.08's, with a 350/350/203.
     
  5. dremu

    dremu Officious Thread Derailer Premium Member GMOTM Winner

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    Ahhhh? 3.08's on a 350 and you're supposed to be able to tow? Gee, thanks GM! :haha:

    -- A
     
  6. txfiremank5

    txfiremank5 1/2 ton status

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    No kiddin' .. although it actually did really well. :confused:
     
  7. BadBob

    BadBob 1/2 ton status

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    Is the RPO code sticker still in the glovebox?
     
  8. Cmoe

    Cmoe 1/2 ton status

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    You could call GM and order a Restoration Package for that vehicle. The only problem is the gears could have been changed at some time I would recommend that you physically check what gears are in it. I found my information in my glove box on the RPO sheet. My '74 K5 "Trailering Special" came with 4.11 gears (mine is a 4wd).
     
  9. y5mgisi

    y5mgisi 1 ton status

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    damn forgot i made this post too....Well we pulled the diff cover and it has 3.21's So thanks for the help but we got er handeled.
     
  10. RootBreaker

    RootBreaker 3/4 ton status Premium Member

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    my 1978 "Camper Special" came with 4.56's and a gvrw of 8400 :bow:
     

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