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  1. F

    Transfer case shifter handle

    Thanks for the reply, I will look into the cause a Little closer
  2. F

    Transfer case shifter handle

    In my 1980 GMC k3500 it has a 454 in it with the manual transmission, I remember when the 400 engine and the th400 transmission was in this truck the four-wheel drive shifter handle was really solid not hardly any play, but when my brother put in this 454 and the 205 transfer case the handle is...
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    Ignition timing

    With all this information is it recommended to have Porter vacuum on the vacuum advance or manifold vacuum?
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    Lubrication

    Thank you for everyone's help!
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    Lubrication

    I'm all for using gear oil too unless there's something that transfer case that requires a thinner viscosity to keep it in good working order?
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    Lubrication

    I found the tag and it appears to be damaged a little but I believe 205 is legible
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    Lubrication

    These pictures here of the transfer case
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    Lubrication

    I could not find around metal tag but I did take a few pictures and one of them has a number in it
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    Lubrication

    I will have to look for the tag because I don't know which one it is, just for memory I think it looks like steel or cast not aluminum, the engine my brother took out of his 78 3/4 ton along with this manual transmission so I'm assuming he brought the transfer case with it but I will look and...
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    Lubrication

    My 1980 GMC K3500 has a 454 with the standard 4-speed transmission, it came from the factory with the 400 engine and the th400 transmission, my question is what kind of lubricating fluid should be in the transfer case? When my brother put the four-speed transmission in I'm guessing he had to...
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    Ignition timing

    If I recall the rims are off of a 2012 Dodge ram 3500, and since the hubs were a little larger I had to buy the special shims to make them fit correctly but so far they're doing just fine. As far as a heavy hauler, I don't know what I'm going to do at this point it was my dad's truck he bought...
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    Ignition timing

    What about 235/80/17 tires?
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    Ignition timing

    I upgraded to 17-in rims, so that's the rim size of the tire I will be going with now I just need to decide what size of tire?
  14. F

    Ignition timing

    I don't know the size of the tires off the top of my head but they're due to be replaced so maybe some taller tires will be in order?
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    Ignition timing

    Thank you for the information, my truck is supposed to have 4:10 gears in the differential, the other day I took it on the highway and I was doing 55 miles an hour the RPM was just above 3000, which seemed a little high cuz the RPMs were up there, but this truck originally came from the factory...
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    Ignition timing

    I have an adjustable timing light but I've never used it for total timing, what's the procedure for using it for total timing?
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    Ignition timing

    1980 GMC 1 ton dually four wheel drive
  18. F

    Ignition timing

    What should the timing on my 78 454 be? It's a slightly modified engine with an RV cam that's in my 1:10 dual four wheel drive with a 4-speed manual
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    Led headlight mod

    Do the ones from summit cause noise interference?
  20. F

    Led headlight mod

    I have a 1980 GMC K3500 I want to upgrade the headlights to brighter lights, can I just change the bulbs to LED or do I want to change the entire assembly? Does anyone have experience with the headlight mod? Thank you in advance.
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    Vintage Air Firewall Installation

    Did your truck originally come with air conditioning?
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    Aftermarket windshield wipers

    By bayonet style are you referring to the snow and ice blades?
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    Aftermarket windshield wipers

    The factory windshield wipers on a 1980 GMC or 16 inches, that seems very small for that big window, will longer wipers work on this truck? Or maybe a combination of two different lengths like you see nowadays?
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    Electric fuel pump

    Okay, thank you
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    How do I test mechanical fuel pump

    I'm an innocent victim!

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