Today I went and picked up the ring and pinion from Craigslist seller. It's got really minimal wear and is in excellent condition, save for the three teeth with some obvious rust on the drive thrust faces that Van Der Haag's polished up before selling it to him. Guy seems on the up and up, and he had the box from there, so I believe that Van Der Haag's shipped it as such.
So, Stovebolt hive mind, should I just go ahead and install this as-is? I certainly don't want to chew up the pinion, but if the rusted spots are lower than the rest, will they just hold oil?
Edit: the gears really aren't as brown as they look, they are dark grey but my camera's white balance and LED kitchen lighting make things look rusty when they aren't.
Last edited by Gdads51; 02/05/20245:47 PM. Reason: update title to match new forum
OH, almost forgot-seller had a '57 Viking into which he'd installed a Detroit Diesel 4-53. The truck originally had a 283, then someone put a big block Chevy in. But that engine had problems, so he put the Detroit in. It looks like it came from the factory!
Tronman, Just a note that since your search for the needed parts is done, your tech question needs to get moved to an appropriate forum for that conversation and further help from fellow Bolters. Based on the idea that your working on a C60 (Big Bolt), I've moved your posts to the Big Bolts forum. Others should be along soon to try and offer some help with your questions!
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
And since we're now over in Big Bolts, I guess I can follow up with, does anyone know where I might find the overhaul instructions for this axle? I have a 1967 GMC medium duty truck service manual, but it doesn't go into detail on the T170, so I assume that got its own tech manual.
Tronman, Which link has the info for the T170??? There may be some other Bolters that could use that reference too!
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
But get this.. it has complete instructions for teardown and reassembly of the unit, with frequent references to 'torque to specifications.' However at the end of the manual *it doesn't have any of the internal component torque specs like ring gear to housing, cap bolt, etc!!
So I'm going through each additional one to find the book with the complete torque specs. Grrrr...
I have an original 1968 C10-60 Chassis Overhaul Manual (ST 134-68) given to me by fellow Bolter Wrenchbender Ret. that I looked at to see if the T170 specs were in there.
Unfortunately, for what ever reason the big truck differentials listed in the Torque Specifications list the designations as 15,000 and 17,000 Lb. Capacity (Two Speed) or 18,500 Lb. Capacity Eaton (Two Speed) and not by differential Model #. I'm just not familiar enough with these size trucks to know which is which. Perhaps one of our fellow Big Bolters can shed some light and confirm if one of these is the T170???
Either way, attached below is a pic of the various differential "Specifications" with bolt torque info for all the listed rear ends. Hope it's of some help.
PS - If it is, the manual has the overhaul details that I could take pics of and post if needed.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
Note the complete lack of bearing cap bolt, ring gear bolt, or adjuster locknut torque specs. This is the only page, the next one is carburetors. The actual overhaul looks to be pretty simple and I'm confident I can do it. Just need the correct tightening specs so it won't come apart by itself later on.
@Gdads51 that's the right spec page, I have the T170, the 17,000lb two speed axle. Seeing your reference to the 1967 manual, I downloaded that and sure enough, the page is right there. Thank you!
Yep, I know it's the T170 because I swapped my worn out T150 for it, back in the '90s when you could still get T170 parts at the dealer. Of course, it's once again a dinosaur now, but back then it *was* the modern day upgrade!! My, my Dad, and my friend Adrian spent a very greasy Saturday afternoon doing the switch.
There's an old shade tree method for torquing bolts you don't have an exact spec for that's worked well for me for a lot of years. "Snug plus 1/6 turn". Take out all the noticeable slack between the parts you're assembling, and then turn the hex bolt head one more flat. That stretches the bolt slightly and keeps it tight. It's surprising how closely that method matches the published torque specs on things like head bolts, main bearings, and similar components. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
That's what the service instructions told me to do on the last Pontiac I worked on, the rod bolts were torqued to a low value then 1/6 of a turn to final. Just put a white dot on the rod next to a point on the hex head, then tightened til the next point was lined up with said dot.
