CRG Discussion Forum
Camaro Research Group Discussion => Decoding/Numbers => Topic started by: 68Zproject on March 24, 2007, 06:37:50 PM
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Is there a "rule" to how the vin #'s were stamped on the 68 Muncie for the Z28? JM's book shows one that has a 1 before the vin, I guess to denote Chevrolet? Like 18nxxxxx and Pontiac 28nxxxxx. I talked to a guy rebuilding my trans and he said he hardly ever sees the 1 before the vin #. Is this 1 just on Norwood, Los, 68 Z's, certain production runs or what? Or is it just supposed to be there and sometimes it doesn't get put on?
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It's always 18N392050 on the vin stampings in '68. I have rebuilt more than I care to talk about.
Jerry
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It's stamped by the same machine that stamped your engine VIN. Not only should the 1 be there, but the characters will always match the one on the engine pad.
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That's what I was hoping, thanks again Jerry. It would be 18Lxxx for LOS cars though right?
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It would be 18Lxxx for LOS cars though right?
18Lxxxxxx for Los Angeles cars. Also, the '68 Los Angeles built Camaros have the vin stamping on top of the transmission case. This is where I found mine.
Paul
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[/quote] Also, the '68 Los Angeles built Camaros have the vin stamping on top of the transmission case. This is where I found mine.
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Is that fairly consistant? I thought I had seen some on the side.
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Yes, LA did that with any original 67-68 Muncie that I've seen. Usually stamped at least three to four times. On the very front part of the case, at the rear of the case, on the center bearing support, and the tailshaft lip.
Jerry
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67 doesnt have the 1 in front of it. 68 and 69 do.
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Usually stamped at least three to four times. On the very front part of the case, at the rear of the case, on the center bearing support, and the tailshaft lip.
Jerry
Now that's something I didn't know and will have to check! Is it always at least three to four times?
Paul
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Never seen a transmission stamped more than once (except for maybe an overstrike).
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I think I had a LA built 69 with it stamped probably four times on the top. Not overstrikes. Kurt probably has pics somewhere.
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Were all Muncie's stamped with VIN's? Or just Z-28s
Pat
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Pat
Other cars received Muncie's, with the associated VIN stamped on them, other than just the Z-28.
Steve
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Never seen a transmission stamped more than once (except for maybe an overstrike).
My 67 Muncie from LA Plant is stamped 3 times with the VIN
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I think the stamping on LA Muncies depended on the mood of the plant worker. Many LA Muncies have come in here for rebuild and resto and there is no consistancy to them at all.
Jerry
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It wou
I think the stamping on LA Muncies depended on the mood of the plant worker.
It would be comical to find one stamped about 100 times all over the place by a pissed off, stressed out worker!!!!
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Usually stamped at least three to four times. On the very front part of the case, at the rear of the case, on the center bearing support, and the tailshaft lip.
Jerry
Now that's something I didn't know and will have to check! Is it always at least three to four times?
Paul
I got under the old Z tonight to check for multiple vin stampings on the Muncie and could only find two. Both stampings are on top of the case, right (passenger) side, one in the front and one in the back as Jerry described. There could be more, but with the transmission in the car and 39 years of grime, that's all I could find with my mirror. There is also a metal tag attached to transmission side cover with the number 3915085 embossed on it. What does this number reference?
Paul
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There is also a metal tag attached to transmission side cover with the number 3915085 embossed on it. What does this number reference?
Paul
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That tag is the "assembly number" for the transmission - it identifies the specific combination of main, side cover, and tailhousing castings, gearset type and ratios, input and output shafts, and output shaft speedo drive gear diameter and tooth count to suit a specific usage. Although most Muncies look the same externally, there were about a dozen different "assemblies" used, and that part number tag (and the broadcast code) identified which one they were.
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That tag is the "assembly number" for the transmission - it identifies the specific combination of main, side cover, and tailhousing castings, gearset type and ratios, input and output shafts, and output shaft speedo drive gear diameter and tooth count to suit a specific usage. Although most Muncies look the same externally, there were about a dozen different "assemblies" used, and that part number tag (and the broadcast code) identified which one they were.
Where can I found the specific usage of this number (3915085)? I'm curious if this number was only used for a Z/28?
Paul
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Paul the 3915085 M21 Muncie 4 speed transmission had multiple usage in 68 (see the scan below).
Ed
(http://i61.photobucket.com/albums/h52/bertfam/Muncie.jpg)
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Thanks Ed! Where did you find this info? Your P&A manual? Also, what does "C.A.C." stand for? ???
Paul
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Yup. The P&A.
C.A.C. stands for "Cold Air Conditioning" (as opposed to "Hot" Air Conditioning I guess!!)
Ed
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C.A.C. stands for "Cold Air Conditioning"
Close. :)
"Car Air Conditioning"
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OOPS! You're right Kurt. I should have looked in the abbreviations section of the P&A before I spoke!!
Ed
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Thanks guys. C.A.C., that's a new one for me. ::)
Paul
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Never seen a transmission stamped more than once (except for maybe an overstrike).
my 71 ss chevelle m22 was stamped twice.once on the flange (side) and on the case next to the flange.
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My 68 LOS z28 is stamped also in 2 spots.Each has a B behind the numbers and it is a 03e car with 302 tags