Does anyone have a 1969 AIM with the F-41 option in it? The one that I have does not have it. I need some info to be used in the next revision of the manual. Thanks in advance.
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Dick Whittington -
Re: C-3 F-41 information
Dick-----
Mine doesn't have it. Also, I sort of doubt that there ever was a UPC F-41 section for the 1969 AIM. The part number information on the front and rear shocks is contained in the front and rear suspension sections. The part number information on the front and rear springs is contained in UPC 0 (and referred to in the front and rear suspension sections). The only other F-41-specific components were the rear shock mount shafts and the front stabilizer bar. I don't know how the assembly plant knew the correct components to use for these.In Appreciation of John Hinckley -
Re: C-3 F-41 information
Joe...is there a different shock mount for the base versus the F41 shocks? Is it just a casting number or is there a visible difference?Comment
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Re: C-3 F-41 information
When setting on the ground it would be hard to visually identify the differenceDick WhittingtonComment
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Re: C-3 F-41 information
Joe. what I am looking for is some support documentation for the statement you made about the shock part # change on F-41 shocks in 1969. I realize that the AIM is somewhat a poor reference for such things as that, but it is better than nothing.Dick WhittingtonComment
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Re: C-3 F-41 information
Dick----
The shock part number change would be found on the regular front and rear suspension sections of the AIM. On those pages are found the part numbers for BOTH the standard and F-41 shocks. My "edition" of the AIM shows no change in the shock part numbers during 1969. However, I think that there was a change which occurred prior to the end of the 1969 model year that's not reflected in my, or, perhaps, any copy of the AIM available today.
Unfortunately, for 1970 and 1971, no F-41 shock information is presented in the AIMs. I suppose that's because, for these years, F-41 was available only as part of the ZR-1 or ZR-2 packages. No UPC for the ZR-1 or ZR-2 are to be found in the AIMs and, as I say, no F-41 information is provided on the regular suspension sheets.
For 1972, the F-41 shock information returned to the regular suspension sheets, even though F-41 was only available as part of the ZR-1 package for that model year. By 1972, the part numbers for the F-41 shocks had changed from those found in the 1969 AIM, the last previous AIM that presented F-41 shock information. So, all we know is that the F-41 shocks changed sometime after the printing of the 1969 AIM that is generally available today and prior to the printing of the 1972 AIM "edition" that we have today.
However, we do have other SERVICE parts information that may shed some light on the issue. The GM #3171488 front F-41 shock used for 1963 to 1969 was known in SERVICE as GM #3166559 (number on box). The GM #3171489 F-41 rear shock used from 1963 to 1969 was known in SERVICE as GM #3166560 (number on box).
The GM #3166569 was discontinued from SERVICE on January 1, 1971 and replaced by GM #5559369. The GM #3166560 was discontinued from SERVICE on April 4, 1970 and replaced by GM #4940459. Keep in mind that the discontinuation dates for these parts represents when the last one was drawn out of GMSPO inventory. In almost all cases, the date that this occurs will lag well after the change in PRODUCTION. That would be especially true for shocks like these that, because of their limited usage, probably didn't sell really fast in SERVICE.
My "theory" has always been that the rear shocks changed first and that is exactly what's "supported" by the date of discontinuation described above. I think that the change to the 4940459 rear shocks, which may have been known in PRODUCTION as GM #4949820, occurred very late in the 1969 model year, perhaps in October, 1969, or later.
For the front shocks, I'm not really sure. They may or may not have changed during the 1969 model year. There is no reason to expect that the fronts and rears changed as a "car set" and simultaneously.In Appreciation of John HinckleyComment
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Re: C-3 F-41 information
Bruce-----
There is a difference both in configuration and in forging number. I'll be posting information on this very soon in a seperate post.In Appreciation of John HinckleyComment
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