Code questions

741 Views 2 Replies 2 Participants Last post by DaleM, Sep 19, 2009

69chevyman

Discussion Starter · Sep 19, 2009 (Edited)

Just looking through my car for the build sheet(I might have to accept defeat) and noticed a code stamped on the dash underneath the glove box. What's that about? 40-1799

Also, I was under my car looking at the rear end and was wondering where to look for the numbers? I saw some cast numbers but nothing stamped yet. Would the rear end(if original to the car)explain what tranny I had? The car has the cross member for a manual.

Last thing, I was looking at the springs and noticed a piece of paper still left on the rear drivers side, I carefully removed it and the sticker is mostly gone but after cleaning it I noticed this number on it. 485688. Does that mean anything for the springs? I believe this car has the F40 suspension on it.

Thanks

Edit: I located the other sticker on the opposite side but cannot remove it without destroying it. It has a faded H1 on it.

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DaleM

· #3 · Sep 19, 2009

69chevyman said:
Kind of depressing, but the code on the rear end is a CW. The bad news is it's not a Posi, the good news is it was a rear end that went with the 350 Horse engine that I suspect was in the car with the Tach redine at 5500.

Edit: Maybe someone can help me out, I misread the 350 for HP instead of Cubic Inches. Could you have a 350 horse engine with a CE rear end? Did a 5500 redline indicate a 350 horse engine only or did it work with a 325 horse engine as well?

Is the rear end stamped CW or CE? CW is a 3.31 open 12-bolt that has been found behind 396 engines, both 325hp and 350hp, as well as the L48 350/300hp engine. The CE rear end is a 3.08 indicating a 10-bolt and wouldn't be used in an SS car.

Casting numbers on 12-bolts are 3917124 (early) and 3959038 (late) and the 10-bolt is 3859037.

The 5400 redline tach is listed in my parts book as being used in all 396 except special high performance which I take to mean both the 325hp & 350hp engines.

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