I have a sept.1969 Z/28.On the two front hose lines{left and right},should there be a retainer clamp in the very center of each? If so exactly how do you secure it{subframe or a-arm}and where does the tab go into? In Rick's First Gen. book it is on page 79 upper right hand corner. Any info would be greatly appreciated. Thanks! Larry,69Rfine
P.S. I'm not talking about the upper hose line brackets on top of the subframe that secure the hose with a retainer clip.

I have a sept.1969 Z/28.On the two front hose lines{left and right},should there be a retainer clamp in the very center of each? If so exactly how do you secure it{subframe or a-arm}and where does the tab go into?
Attaches to the rear of the upper A-arm and the tab is an anti-rotation tab for the clip to prevent it from spinning when the bolt is tighten to attach the clip to the arm.

Some one here, I'm sure, will post a pic of the attachment.

ask and you shall receive :)

http://www.brainerd.net/~knudsen/69RS/Misc.Stuff/69RSDiscBkDriveSide2a.JPG

Here is another picture from the Camaro origional survivor image archive.

http://home.pacbell.net/camsdad//Brakes/Z89.jpg

So my added question here is,
Which orientation of he bracket is correct?

Kurt

So my added question here is, Which orientation of he bracket is correct? Kurt
Both pics are correct. Click's pic is of the drvr side, your pic is of the pass side.

The clip is made one way, there is no left or right hand clip.

My original '69 has the hose below the bolt on both sides.
:beers:

Well I never....
So thats what those clamps are for!!!!
They where leftover from my rebuild yrs ago.
When I rebuilt I got the hoses made an extra 30mm longer (cheaper to get custom made in NZ, than buy)
I then clamped to the chassis holes shown above.
Just shows it pays off hitting the new posts button and browse pays off...20 yrs later lol

Okay camaro gerus! Help me out! I looked for these holes in my upper A-arms and could not find them! I must admit that these were recently installed but sold to me as original 69 upper A-arms! Can't check my old ones either, since they were from a 67! My friend who is a very good mechanic looked at this set up and said if the hoses were to be secured to the upper arms would cause alot of movement in the hose resulting in premature wear. I have a Sept. 1969 Z/28 and need to know if a late change was made deleting this or if I have perhaps the wrong year arms again! Please help! Thanks! Larry,69rfine

Maybe JohnZ can confirm, but if the order sheet called for disk brakes, then the A arm with the holes could be used instead of standard A arms?? Just a guess on my part. In that case your A arms could have been replaced or are you 100% sure it is a true Z ?

Yes it is a real Z/28. Norwood built X77 code, has the mandatory fromt disc brakes.The car was hit pretty hard in front in 1971, during the repair they replaced the subframe with a 67 subframe, which I'm in the process of switching out for a 69 one, one lower a-arm was replaced with a 67. I bought recently both side upper and lower arm off of a 69, and have them installed on the correct 69 subframe. So you did bring up a good point, did they make two different versions of the upper arm in 69? One for disc the other for drum? Thanks! Larry,69Rfine

Yes. 1969 non-disc brake cars did not have the hole for the clamp. It seems you have the arms from a non-disc car.
TTFN
Mat

Thanks Mat! that was the answer I needed! I just need to find the old upper A-arms, these could be the original with the holes, if not I will have to put these holes in at which I will need measurements for these holes. I'm crossing my fingers! Thanks again! Larry,69Rfine

I wouldn't think that there would be different control arms for disc verses drum brakes. Yes, I agree there would be different hose routing and clamps, but I believe the arms would be the same except for the hose clamp mounting holes, and these could be drilled to suit the application.

Both the upper and lower control arms were different for disc brakes on a '69:

Drum brake uppers - 3914871-2
Disc brake uppers - 3955757-8
Drum brake lowers - 3960359-60
Disc brake lowers - 3945517-18

The unique part numbers for J52 are shown in the A.I.M. in J52, Sheet A1.

:beers:

It would be interseting to see a side by side comparisson of the A arms.
I would bet there are no part numbers on them to identify the difference.
IMO, Just do a mock up, measure, then punch your holes.

Kurt

What visual diferences were there between disc and drum on both upper and lower arms?Thanks! Larry,69Rfine

I think the a-arms are the same for disc and drum...just different assemblies. My a-arms which I think were original to my car(not positive) , which was originally a drum brake car, had the hole for the hose bracket bolt. I can't remember if the hole was tapped from the self tap screws, or if I had to cut them when I installed the bolts.

William answered this in the other thread you had, thats why staying in one thread is a better way to finalize questions.

sorry about that! I'm pretty much a newbie still! Either than the holes on the upper for hose any other differences? What if any differences on lower? thanks! Larry,69Rfine

Larry I think William answered that already. From his statement:

For service purposes Chevrolet did not differentiate control arm part numbers between drum/disc brakes:

upper:
3963843 lh
3963844 rh

lower:
6258451 lh
6258452 rh

The original question implies that there are physical differences in arms between disc/drum brakes. There is not.

Not an expert but it sounds like the holes may be the difference.

There was no other physical difference in the production upper control arm assemblies between drum and disc (cross shaft, bushings, ball joint, etc.) other than the holes; I'd guess that the arm-only service parts were the pair with the holes, as they'd service all applications. Just a guess - I don't have the drawings.
:beers: