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Old 02-17-2025, 11:57 AM   #1
Kootenay64
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Hub rebuild resources 72 K25

Hello, I am looking for resources to show disassembly / assembly of the 4x4 hubs on my 1972 GMC K25. I have searched all topics here, or so I think, to no success.
Work completed on the front end so far is ball joints, pitman arm, drag links, and power steering box, tie rod ends all replaced.
Next on the list are the wheel bearings as it definitely appears they are in need of replacement, and obviously hubs need to be removed and replaced to do so.
thanks in advance for any help!
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Old 02-17-2025, 03:28 PM   #2
1970cstblazer
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Lightbulb Re: Hub rebuild resources 72 K25

Those hubs are the Dana Spicer external type face tooth design used from 1970-early 1977. The K/5 and K10 hubs are the internal type face tooth design used from 1968-1980.

http://forum.73-87chevytrucks.com/sm...?topic=22710.0

https://dml.dana.com/assetbank-dana/assetfile/8006.pdf
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1970 K/5 Blazer CST 4WD, TOTM winner December 2024! Medium Bronze, 93k ACT. miles, 350, 4 speed, rear positraction, 16.5" x 8.25" HD Kelsey Hayes wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration finally getting close to completion..

1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor...

2017 Sierra 1500 SLT 4WD, Black, 45k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2...

2019 Canyon SLT 4WD, White, 62k miles, 3.6, 8L45, 3.23 LS, 18" wheels
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Old 02-17-2025, 03:29 PM   #3
57taskforce
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Re: Hub rebuild resources 72 K25

They are easy to take apart. I don’t have any exploded views but basically all it is to get them apart is a snap ring or two and the Allen bolts. There’s really not to much to it once once you get the dial housing pulled off. Lube them up with a light film of gear oil and not grease when you put them back together. That will help to keep them from getting stiff in the winter.
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'57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888
'72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879
‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206
'98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s
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Old 02-17-2025, 03:46 PM   #4
Kootenay64
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Re: Hub rebuild resources 72 K25

Awesome thanks guys for the info!
Exactly what I'm looking for. Everything I've seen on these it seemed a bit intimidating but reading the attachments it doesn't look too bad.
Assuming once the hubs are dismantled and callipers removed the wheel bearings should be fairly straight forward? I've done bearings on other trucks so I'm aware what that's about.
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Old 02-17-2025, 03:53 PM   #5
1970cstblazer
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Lightbulb Re: Hub rebuild resources 72 K25

Yes. You'll need a spanner socket to get the large nuts off. Other than that, pretty straightforward.
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1970 K/5 Blazer CST 4WD, TOTM winner December 2024! Medium Bronze, 93k ACT. miles, 350, 4 speed, rear positraction, 16.5" x 8.25" HD Kelsey Hayes wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration finally getting close to completion..

1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor...

2017 Sierra 1500 SLT 4WD, Black, 45k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2...

2019 Canyon SLT 4WD, White, 62k miles, 3.6, 8L45, 3.23 LS, 18" wheels
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Old 02-17-2025, 04:05 PM   #6
57taskforce
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Re: Hub rebuild resources 72 K25

Quote:
Originally Posted by 1970cstblazer View Post
Yes. You'll need a spanner socket to get the large nuts off. Other than that, pretty straightforward.
Correct and my local oriely auto parts sells the socket you need for less than $20, hopefully you’ll have the same luck.
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Tyler
'57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888
'72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879
‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206
'98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s
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