Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Is this the first start up? How did you adjust the lifters? It does sound like loose rocker arms. Hard to tell though in video. Noises like that can be exhaust leak too, but it sounds like several loose rockers to me.
I haven't read this whole thread and I'm way behind. So have you swapped out the rear end? What suck is, it's rare as rare can get, but IIRC, there are 2 gear ratio options for that truck. It's got a drop out 3rd member but IIRC, 3.23 and 3.90 were the gear ratio options and the 3.23 is so rare, kinda like the 3/4 ton trucks of the same year got the drop out Corporate axle. Biggo boheemyth axle. 2 Options, 4.10 and 4.56, 4.10 was very rare and most got the 4.56. To get the 3.23 in the half ton or 4.10 in the 3/4 they had to pretty much be special ordered trucks. I know I FINALLY found a 4.10 for my dad's 68 3/4 ton and it came out of an Ambulance that has been special ordered.
It was a problematic 283. Bent/warped valve
He didn't swap axles or gears. I don't think it has the drop out 3rd member, I think it's a Dana, not Eaton. I may have shared photos from my shop manuals early in this thread regarding the axle. He has the borg warner 3 speed. That's all going away.
www.gmsquarebody.com
And I see no mention of the 3.90 gear ratio. But now that reminds me, I'm not thinking of my 64 or my buddy's 66. That's my old 62 that had the 3.90 and drop out. I know, I broke that bish all the time. I think I bought all the used drop outs in So Cali back in the 80s til I finally got the 64 GMC with the Dana 60 and 4.56s. Quit breaking axles, spiders and R and P's then. And that one had an LSD in it that worked well til I wore the clutches out of it which is why I prefer lockers now. No clutches to wear out.@HotRodPC
Finally got a running 65 C10
Not with that attitude...lol.. Kidding aside, I do agree, it's not a gear banging tranny, it's a workhorse tranny, but it can be shifted smoothly and semi-quickly, especially with a decent clutch setup and adjustment. AND Practice ;)
Yeah, not 3.90, or drop-out. I forget if he shared the numbers stamped on the ring gear, or if he counted the teeth to figure out the ratio.
I think I'd keep it manual and just convert it to an NV3500 5 speed. It's just a little lightweight stepper and a 283. I'm sure the NV3500 would hold up well. It's what comes in the GMT400 1/2 tons and even up through the Vortec 350 engines that had much more ponies and torque than the 283. Be a great combo and prolly some good mpg too having 2 more gears 1 being an OD. I'd imagine that's going to entail converting to a hyrdo juice clutch though insted of the Z bar linkage clutch.
You really need to focus on the last, say, 10 pages of the thread. He's not keeping the 283
Yeah, I wished I'd had kept up with it, cuz I don't know anything about it other then what you're telling me. I would have but when I seen there was over 50 pages, I didn't even try. If you say it's the last 10 pages, maybe when I get some time. In a hurry today to get off the PC. 3 days in a row of overcast, I'm out of power the last2 nights so I gotta get off here quick and shut down the PC and TV monitor.
