Author Topic: Stewart Warner Speedo adapters  (Read 1610 times)

bcmiller

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Stewart Warner Speedo adapters
« on: June 15, 2023, 03:47:10 PM »
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. 
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: Stewart Warner Speedo adapters
« Reply #1 on: June 15, 2023, 04:35:20 PM »
Well here are the part numbers and ratios from the 1972 parts catalog. Now I guess need to cross reference the part numbers.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: Stewart Warner Speedo adapters
« Reply #2 on: June 15, 2023, 04:41:58 PM »
Looks like the .7333 might be correct for 69 Chevelle with 4.10 including COPO but not Camaro?

The images below are for 1969.
« Last Edit: June 15, 2023, 05:53:19 PM by bcmiller »
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

GMAD_Van Nuys

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bcmiller

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Re: Stewart Warner Speedo adapters
« Reply #4 on: June 15, 2023, 04:59:58 PM »
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.

« Last Edit: June 15, 2023, 05:52:00 PM by bcmiller »
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: Stewart Warner Speedo adapters
« Reply #5 on: June 15, 2023, 07:55:35 PM »
Date codes are here via my buddy Jose. :)

https://www.yenko.net/forum/showthread.php?t=160435
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: Stewart Warner Speedo adapters
« Reply #6 on: June 16, 2023, 11:44:03 PM »
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.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: Stewart Warner Speedo adapters
« Reply #7 on: June 17, 2023, 03:18:03 PM »
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

Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: Stewart Warner Speedo adapters
« Reply #8 on: June 18, 2023, 01:29:37 AM »
Will go ahead and add the speedo gear chart since that may also come up in the future if this topic is searched.

Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

70z28lt1

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Re: Stewart Warner Speedo adapters
« Reply #9 on: June 18, 2023, 08:12:19 PM »
70Z with 3.73 got the .8241 3950352
4.10 got the .7333 3932220
http://www.gmpartswiki.com/getpage?pageid=12662

bcmiller

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Re: Stewart Warner Speedo adapters
« Reply #10 on: June 19, 2023, 07:59:20 PM »
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
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016