Tranny identification question. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

spencra · 01-05-2006, 10:28 AM

I know that this has probably been asked a million times on this board, but now I guess it's my turn.

Anyway, I have an SM465 tranny and I'm trying to figure out what year truck this might have originally been mounted to. If that's possible of course. Here's the marking that I had gotten of of the tranny (which was stamped in front of the shifter lever)

3901131 (I couldn't tell if that last number was a 1 or a T though)
GM 31
A 283

These are the only numbers that I could find at the time. My garage is full of crap and the lighting wasn't very good

Thanks in advance everyone,
Larry

**truckdude239** · 01-05-2006, 11:10 AM

spencra · 01-05-2006, 12:14 PM

Quote:

Originally Posted by truckdude239

It's an SM465, I don't believe that the appearance's are very different than any other SM465. That is unless it has a transfer case hanging off of it of course, which mine doesn't.

Blazer1970 · 01-05-2006, 06:00 PM

A283 is a date code. January 28, 1973 or 1983. The older 465s have the bottom two bolts that hold the tranny to the bellhousing coming in from inside the bellhousing (threaded holes in the tranny), while later models have all four bolts coming in from the tranny side. Early model 465s ('68 - '72 era) will have a second electrical switch on the tranny (besides the backup light switch) to indicate that the tranny is in high gear for the TCS system.

01-05-2006, 10:28 AM	#1
spencra This, is my BOOMSTICK! Join Date: Oct 2003 Location: Berlin, CT Posts: 1,310	Tranny identification question. I know that this has probably been asked a million times on this board, but now I guess it's my turn. Anyway, I have an SM465 tranny and I'm trying to figure out what year truck this might have originally been mounted to. If that's possible of course. Here's the marking that I had gotten of of the tranny (which was stamped in front of the shifter lever) 3901131 (I couldn't tell if that last number was a 1 or a T though) GM 31 A 283 These are the only numbers that I could find at the time. My garage is full of crap and the lighting wasn't very good Thanks in advance everyone, Larry __________________ Larry Got rid of my projects for now. 1980 Jeep CJ7 1998 Nissan Sentra (my car) 2001 Toyota Sienna (wife's, of course) Last edited by spencra; 01-05-2006 at 10:30 AM.

01-05-2006, 11:10 AM	#2
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,233	Re: Tranny identification question. __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

01-05-2006, 06:00 PM	#4
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	Re: Tranny identification question. A283 is a date code. January 28, 1973 or 1983. The older 465s have the bottom two bolts that hold the tranny to the bellhousing coming in from inside the bellhousing (threaded holes in the tranny), while later models have all four bolts coming in from the tranny side. Early model 465s ('68 - '72 era) will have a second electrical switch on the tranny (besides the backup light switch) to indicate that the tranny is in high gear for the TCS system. __________________ Tim Last edited by Blazer1970; 01-05-2006 at 06:02 PM.



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