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Hey I just pick up my 4 speed tyranny today and it had these numbers on it could somebody tell me what I have?
392550 close to the yoke it had this 3857584 GM
the Bel housing had this on it
3899621
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Lifetime Member
Send PMSHELBYVILLE, TN - USA
Joined: 7/5/2002
Posts: 3944
Vette(s): 1976 L48 auto
1978 L82 4speed
1994 LT1 6speed
1978 L82 4speed
1994 LT1 6speed
http://72.14.253.104/search?q=cache:dSGL9s8Lws8J:www3.sympatico.ca/atkinsom/history.html+3857584+transmission&hl=en&ct=clnk&cd=1&gl=us
might try there.. its a muncie 4 speed... possibly looking like a 1968..or 69 model, but.. not sure .. think you might be a number short somewhere...
StingrayJim 
NCM Lifetime Member #1936
Stingray's '76���������������������������� StingrayJr's '78���������������������������Lil Red '94 
(click each one to see a bigger version)
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Send PMModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22720
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Look here for the ID stamp numbers... 
Look for something that looks like this...
Click images for larger views
What you have listed above are just the casting numbers for the case, tailhousing, and bellhousing. The stamped numbers will tell the tale of it's heritage.
btw...these stamped numbers may be on the side, the top, or the bottom...ya just never know...but it will be in that area of the trans(rear).
Adams' Apple 2007-10-08 19:04:11
Look for something that looks like this...
Click images for larger views
What you have listed above are just the casting numbers for the case, tailhousing, and bellhousing. The stamped numbers will tell the tale of it's heritage.
btw...these stamped numbers may be on the side, the top, or the bottom...ya just never know...but it will be in that area of the trans(rear).
Joel Adams
C3VR Lifetime Member #56 
My Link 
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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in Forum: C3 Engines, Driveline and Handling
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