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Old 01-11-2016, 01:43 PM   #19
Farm Shop
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Join Date: Jan 2013
Location: Deer Creek, IL
Posts: 145
Re: 1972 K20 Super Cheyenne - Modernized Classic

So after some more digging, it seems like this trans is a bit of an odd duck. The damper (big steel drum counterweight) apparently started in 1995 behind the 6.5 diesel to fix the 5th gear nut loosening issue associated with the hammering harmonics of a lugging diesel. The weird thing is that this truck has a vortec 350... but it was a 1 ton dually, so maybe all 1 tons got the same trans?

I don't know. Regardless, the damper has to come off. Behind a mild big block that won't ever tow much to be a problem, eliminating it shouldn't be an issue. Now I just need to find a trans shop with the correct spanner/socket to do it for me... spending $170 on a production socket is not a great option right now!
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1970 SWB 2wd C10, Vortec 454/80e, CPP 3/5, slotted mags, patina
1972 K20 Super Cheyenne, Short bed, EFI 396, NV4500, NP208
1970 GTO Judge, heads/cam LS1 & stalled 4L60e
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