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Old 11-21-2017, 11:43 AM   #21
Chulisohombre
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Join Date: Sep 2013
Location: Bangor pa
Posts: 1,223
Quote:
Originally Posted by Mike C View Post
The SPID just shows if someting was ordered different than the standard gear for whatever base combo the truck came with. I have not had any luck with GM's codes stamped on the axle tube being the same as what is inside the housing when I take it apart.

But the Dana tag is awesome as long as some mechanic doesn't not put it back. Or put if on something different... Like you, I have a truck that came with 3.73 gears on the SPID ('86 K30) and even had the Dana 3.73 tag on the front diff. But inside the case was a set of 4.10's.... in this case it would have been helpful if they left the tag off! (The Dana 70 in the rear with 4.10's did not have the tag on it anymore.
After 40+ years anything can be changed. Not a lot still stock under mine except the transmission and front end housing.
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