69 Center axle bumper - two styles?

[Dave69x33]

During the 69 model run, there were two different style center axle bumpers, one retained with screws to the bottom of the chassis, the other a pushed in style. 

Was the push in style a 68 carry over and used on early 69's?

My May "05A" Norwood car has the push in style.  The 69 AIM, UPC section 4, page 59 shows that the documentation was updated on 8-29-68 to include screw #3958062, and changed the bumper from #3923564 to bumper asm #3962763.

Can someone confirm the changeover date?  Does anyone have their original screw in style bumpers?  If so, what is your build date and could you please post a picture of the bumper?

Thanks.

 

[KevinW]

I am curious about this too!  My June 69 leftover SS Van Nuys had the plate (missing the bumper), but my Oct 68 norwood had the push in kind (cant tell if it was replaced)

[L78 steve]

My 04C has the push in style .

[Dave69x33]

Thanks KevinW and L78 Steve,

So far it appears that we have documenation updates in late 1968, an Oct 68 Norwood, April '69 (plant?) and May '69 Norwood car with push-in styles, and a June '69 LA car with the screw on style axle bumper.

Anyone else with their original bumpers?

[Dave69x33]

I would revisit this topic I originally posted it back in 2008.

Since 2008, CRG has added a section dedicated to original and unrestored Camaros so hopefully feedback from the owners of those Camaro can comment and hopefully show photos! 

With your feedback we need to know the plant and build date of your car. Your VIN will also help more closely determine when the change took place.

Question: Is it known when the center rear axle bumper changed from the push in style to the bolted in style on the ‘69?

I saw in the ‘69 AIM, section 4, page 59 assembly manual, an engineering change dated 8-29-68, where the center bumper changed from the push in style 3923564to the bolt on style 3962763.

My July 1969 GM Parts Catalog, “Group 5.395 Bumper, Rear Axle Pinion,” calls for screw in type 3962763 for “1969/ALL” along with this note: “When used in place of a push in CN bumper it will necessary to drill two 9/32 holes, using bumper as a template, and attach with 5/16-18 tap screws.”  It also calls for screw 3958062 which is a self tapping screw.

When I posted on this question on CRG back in 2008, I got two responses. An 04C ‘69 had a push in style, my 45k mile 05A Norwood build N639712 ‘69 had the original push in style still on the car when I started my restoration. One other ‘69 Camaro owner responded with a ‘69 June car from Van Nuys had the bolt in style.  I recently discovered on CRG the low mileage LeMans Blue X77 Z28 survivor, late build 10E Norwood car had the screw in center axle bumper.

All told, based on the GM documentation dates and this very small (4) sampling of ‘69s, it appears the change phased in between mid-May and June 1969.

Can anyone with an unrestored survivor, or documented original restored ‘69, share on this topic?

The photo attached is from the 10E blue survivor.

I’ll start photo documenting this anytime a see a ‘69 survivor!

Happy New Years!

Dave

[Dave69x33]

Here is snap shot of the info from the GM Parts Catalog, Group 5.395 Bumper, Rear Axle Pinion.

[Dave69x33]

And... a full view of the factory assembly manual page 59 highlighting the engineering change I mentioned regarding the change to the center axle bumper.

[RikerZ28]

I just checked my 69 NOR 02D and it has a push in bumper. Looks to be original as it looks like its 55 years old.

[Iowa Jon]

Hi Dave,  my 05A Norwood X77 has the push in style.

Jon

[Dave69x33]

Thanks Jon!

We need to compare notes as my X33 Z28 is an 05A!

[Iowa Jon]

Hi Dave,  after posting I took a look at pictures from another Camaro  I owned back in 2003. 1969 Camaro Norwood built X11  01B.  Pictures look like it is a push in.  I only have pictures of the top side with the floor cut out.  I may have some underside pictures.  If you want to see the pictures email me.   

[R68GTO]

My 09D (late) Norwood has the holes for the screw in style but had a push in style installed when I took it apart for restoration.  Every bumper on the car was original when I took it apart.  This one ws one of the few on the car I couldn't save - it was rock hard and had to be destroyed to get it out.

[Dave69x33]

Interesting R69GTO! Thanks.

[Dave69x33]

RikerZ28…thank you for your response.

R69GTO, forgot to mention that my car also had the two holes for the screw in style but had the push in style snubber. During my restoration I looked closely at the holes and there was no evidence they were ever tapped for the screw in style.

So far, this is what we have, NW = Norwood, VN = Van Nuys:

01B, NW, push in
02D, NW, push in
04C, plant? push in
June, VN, bolt in
05A, NW, push in
05A, NW, push in
09D, NW, push in

Let’s keep in going!

[x66 714]

Norwood, 08E of 1969, push in....Joe