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Re: 32 spline NP208 is not mating up to NV4500... what am I doing wrong??
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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