Shifter mount

[Keith L.]

In thinking about taking the bolts for the shifter mount from my 72 driver to replace the non origiinal ones in my 70 LT-1, I noticed in the AIM (7 B2) that bolt # 3 has different part numbers.
70 - 9419402 72- 3975550.
Then I noticed that the trans lever asm (stick) was different as well as the support. Are these superceded numbers or are these parts different between 70 and 72?

[Joe L.]

Re: Shifter mount

In thinking about taking the bolts for the shifter mount from my 72 driver to replace the non origiinal ones in my 70 LT-1, I noticed in the AIM (7 B2) that bolt # 3 has different part numbers.
70 - 9419402 72- 3975550.
Then I noticed that the trans lever asm (stick) was different as well as the support. Are these superceded numbers or are these parts different between 70 and 72?

Keith-----


The screws in question are self-tapping screws. The GM #3975550 was never available in SERVICE and I have no information on it. The 9419402 was once available in SERVICE and is a 5/16-18 X 3/4" self-tapping screw with a phosphate finish. I think the earlier screw was the same size but I think it had a zinc finish. By the way, these screws strip out VERY easily since they are self-tapping into relatively thin steel. Torque them carefully.

The shifter support bracket had 3 "iterations" over the 1968-79 Period. Just how the brackets differ, I do not know.

I cannot explain the difference in shifter part numbers. The GM #3960609 is the shifter that was used from 1969 to 1976. Just how the 3960607 figures into this I have no idea. Assuming that's not just an error in the AIM (it does happen), I would expect that if the 3960607 differs, at all, from the 3960609, it's a very subtle difference.

[Keith L.]

Re: Shifter mount

So my 70 should have zinc self tapping at the rear of the shifter support. I wonder which part number is shown in 71.

[Joe L.]

Re: Shifter mount

So my 70 should have zinc self tapping at the rear of the shifter support. I wonder which part number is shown in 71.

Keith------



1971 used the GM #3975550. Curiously, 1969 used the GM #9419402.

I do not know, for sure, if the 3975550 was zinc. I have no good information regarding specs for this part number.

[Ronald L.]

Re: Shifter mount

These were also C2 shifter parts and also used all over Gm, lots and lots of pages Chevelle, GTO, NOVA, on & on...