CRG Discussion Forum
Camaro Research Group Discussion => Research Topics & Reports => Topic started by: bcmiller on June 15, 2023, 03:47:10 PM
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I have a question on the correct application for these SW speedometer adapters. Also were there at least two suppliers and two types - SW and AC?
.7333 dated N4 - 1969 April - possibly for COPOs with 14 inch tires and L78 with 4.10 gears?
.8241 dated N11 - 1969 November - possibly for 1970 Z28 with 4.10 and LS6 Chevelles?
I asked my dad about these and where they might have come from, but he is pretty old and could not remember exactly.
I think those are the two most valuable. I have 2 others with different ratios and dates shown in the pics, dated R - 1972 and V - 1976.
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Well here are the part numbers and ratios from the 1972 parts catalog. Now I guess need to cross reference the part numbers.
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Looks like the .7333 might be correct for 69 Chevelle with 4.10 including COPO but not Camaro?
The images below are for 1969.
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https://www.yenko.net/forum/showthread.php?t=152702&page=2
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https://www.yenko.net/forum/showthread.php?t=152702&page=2
I have seen that. Nothing there directly answers my question.
The ones that have a part number starting with 6 are AC, part numbers starting with 3 are SW.
.7333 - the SW version is part number is 3932220
.8000 - the SW version part number is 3905497
.8241 - the SW version is part number 3950352
.8319 - the SW version part number is 3890575
.9743 - the SW version part number is 3950354
1.2020 - the SW version part number is 3950348
1.3000 - the SW version part number is 3950350
So those are the part numbers for future reference if anyone wants to look up the application.
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Date codes are here via my buddy Jose. :)
https://www.yenko.net/forum/showthread.php?t=160435
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I will see about adding the AC adapter information.
Maybe this can end up being in a report, or at least some of it folded into the transmission page.
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Here are the ratios and part numbers for the AC adapters.
.777 - part number 6476736
.824 - part number 6476735
.8974 - part number 6273218
You can go here to see what the AC adapters look like.
https://www.yenko.net/forum/showpost.php?p=860798&postcount=6
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Will go ahead and add the speedo gear chart since that may also come up in the future if this topic is searched.
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70Z with 3.73 got the .8241 3950352
4.10 got the .7333 3932220
http://www.gmpartswiki.com/getpage?pageid=12662
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Yes I believe that is correct for 1970.
I believe some 3.31 cars with TH400 also received the 3950352 in 1970 with TH400.
http://www.gmpartswiki.com/getpage?pageid=11446