Conflicting Information: CRG Chassis / Front Spring Data Section

[rich69rs]

From the CRG chassis; spring usage section:  http://www.camaros.org/images/pages/chassis/69_spring_ID_PA34.jpg ; For 1969, front springs YA Spring as 3955716 and YM asd 3955722

Also, from the CRG chassis; spring usage section:  http://www.camaros.org/images/pages/chassis/69_spring_chart.pdf ; For 1969, this table does not list a part number 3955716; shows YA, YC, YH, YM, and YP as all having part number 3955722.  Also shows HH, and HG as having part number 3955727 and EL, EM, EQ all as having part number 3955712. 

Although the chassis / spring section in clearly states:  "As noted, there are some difference between the service information versus production usage...", I would suggest that the second chart be more clearly marked as being a service replacement chart, not original part number chart, and that the most accurate info. with regard to originality is contained in the first chart; i.e. correct, original part numbers.

I would concur with the first table; 
         that in 1969, YA spring was part number 3955716. 

Attached photo is one of the tags I found on my front springs.

[KurtS]

Both of those 69 charts are service info tables and have some problems, hence the note. One is not inherently more correct than the other.

This is a very difficult topic to research without original documents. We have some of those, but the prints have been changed to show the superceded parts - in other words, to show the service info.

[Mark]

Those charts are a perfect example showing how the GM service organization collapsed multiple production part numbers into more common use service part numbers over time.  The first chart is from 1969 and carries a more diverse listing of part numbers, but still not all of the production numbers used in the factories.  The second chart is from 1971 and the consolidation of multiple part numbers into one part number has already started.  If you followed the chart out later in time, you would probably find only 2 or 3 springs that would service all 67 to 69 Camaros.