AIM Identification for J56 support bracket and caliper

[Robert K.]

Is there a section in the AIM which provides details showing the attachment bolts for the calipers and also the attachment bolts for the support brackets for the J56 Option Heavy Duty Brakes?

I found the J56 section but it focuses on the reservoir area and not the brakes/caliper area......

Perhaps I am missing it ......

[Joe L.]

Re: AIM Identification for J56 support bracket and caliper

Is there a section in the AIM which provides details showing the attachment bolts for the calipers and also the attachment bolts for the support brackets for the J56 Option Heavy Duty Brakes?

I found the J56 section but it focuses on the reservoir area and not the brakes/caliper area......

Perhaps I am missing it ......

Robert-------


You're not missing it. It's to be found nowhere in any year AIM that I am aware of.

[Richard F.]

Re: AIM Identification for J56 support bracket and caliper

The 1974 Assembly Manual on pages 213-229 will show items specific to ZO7, FE7 etc. as it relates to J56.

[Mark F.]

Re: AIM Identification for J56 support bracket and caliper

Robert,

In addition to what Joe says, it's not in there because it came to St. Louis Assembly Plant as a completed sub-assembly from Delco Moraine. Line workers picked them out of a parts crib/bin and simply bolted it on. St. Louis Line workers didn't need instructions on how it was put together - just like the engine (except for engine dress line additions) from Flint or Tonawanda; the transmission; the differential; etc.

The link and an extract below are from a writeup (CRG Research Report) John Hinckley did for the Camaro Research Group [with my additions]:

Its Titled is: Understanding the Assembly Manual and Running Changes

[14-Sep-2010] New: Understanding the Assembly Manual and Running Changes

Why Aren't All The Individual Parts Shown?
Only the parts that were received ready to install at Norwood and Van Nuys [...same thing at St. Louis] are shown in the Assembly Manual. Individual parts of assemblies (like wheel bearings and races that were part of front knuckle and rear axle assemblies, etc.) aren't shown, as the assembly plant didn't deal with them. The best sources of information for items that were part of a complete assembly are the Chassis Service Manual, the Chassis Overhaul Manual [...same for Corvette], and the P&A30 Camaro [and Corvette] Parts Book, which show the detail breakdown and cutaway drawings of such assemblies.

[Robert K.]

Re: AIM Identification for J56 support bracket and caliper

Joe & Mark,

Thank you for your responses and I understand what you're saying. I looked at the 1967 Chassis Service Manual (I have a copy) and there was no information in there either (it did show a picture of the installed caliper in the "Brakes" section however, there was no detail......)

With all that being said, what I am trying to locate is information/specifications related to the bolts/washers/nuts used for the J56 Option with F41 suspension. What type of bolt/washer/nut goes where i.e. caliper attachment bolt, support bracket attachment bolts, etc.) and are they Grade 8, Grade 5 etc. I expect Grade 8 (and have seen some advertised on E Bay as such) but would like to see the pictures/information that I could use to "verify".

Surely, there must be some document that was used to put these all together (but perhaps it doesn't exist anymore).

P.S.
I also looked in Noland Adams "Corvette Restoration & Technical Guide - Volume 2) which I have and there is no information in there either other than a great detailed explanation of the parts included with the F41 Suspension Option and also the J56 Brake option.

NOTE:
I do not have a copy of the Chassis Overhaul Manual or the P&A30 Corvette Manual (which Robert mentioned), but, if anyone has a copy of either of those and could look to see if that information is there, I would appreciate it........

[Robert K.]

Re: AIM Identification for J56 support bracket and caliper

Richard,

Thank you.

I do not have the 1974 Assembly Manual. Is this something that you have and could provide me with a picture of that section. I don't know if it would have changed (but probably) from 1967 (that is the year that I am looking for information on) however, I would like to see it , if possible......

[Michael J.]

Re: AIM Identification for J56 support bracket and caliper

I remember going through some of this when my '66 with J56 was restored. I think we just gave up and reused what was there after being cleaned up, etc. and the pads and calipers replaced/rebuilt by Lone Star.

[Joe L.]

Re: AIM Identification for J56 support bracket and caliper

Joe & Mark,

Thank you for your responses and I understand what you're saying. I looked at the 1967 Chassis Service Manual (I have a copy) and there was no information in there either (it did show a picture of the installed caliper in the "Brakes" section however, there was no detail......)

With all that being said, what I am trying to locate is information/specifications related to the bolts/washers/nuts used for the J56 Option with F41 suspension. What type of bolt/washer/nut goes where i.e. caliper attachment bolt, support bracket attachment bolts, etc.) and are they Grade 8, Grade 5 etc. I expect Grade 8 (and have seen some advertised on E Bay as such) but would like to see the pictures/information that I could use to "verify".

Surely, there must be some document that was used to put these all together (but perhaps it doesn't exist anymore).

P.S.
I also looked in Noland Adams "Corvette Restoration & Technical Guide - Volume 2) which I have and there is no information in there either other than a great detailed explanation of the parts included with the F41 Suspension Option and also the J56 Brake option.

NOTE:
I do not have a copy of the Chassis Overhaul Manual or the P&A30 Corvette Manual (which Robert mentioned), but, if anyone has a copy of either of those and could look to see if that information is there, I would appreciate it........

Robert------


The bolts are essentially the same as the corresponding non-J-56 bolts except they are longer by the width of the support brackets at the bolt holes. They are GM-300M grade bolts (SAE 8) and black phosphate or black oxide finished. There is no washer on the bolt head end and no washer on the threaded end. The bolts are retained by distorted thread type lock nuts of GM 301M (SAE grade 8).

I have the 1967 Chassis Overhaul manual and there is nothing in it regarding the supports or their attachment. Actually, if this information were published by GM anywhere, it would be in the Chassis Service Manual and not the overhaul manual.

[Joe L.]

Re: AIM Identification for J56 support bracket and caliper

Richard,

Thank you.

I do not have the 1974 Assembly Manual. Is this something that you have and could provide me with a picture of that section. I don't know if it would have changed (but probably) from 1967 (that is the year that I am looking for information on) however, I would like to see it , if possible......

Robert------


I can find nothing in the 1974 AIM that is specific to the J-56 brake caliper/caliper support installation.

[Mark F.]

Re: AIM Identification for J56 support bracket and caliper

Robert,

not exactly what you're asking for in your original post, but check out what John Hinckley ("JohnZ" is is call sign) says about J56 brakes in this post on the other forum...he's got some stiffener photos, too with readable part numbers...

https://www.corvetteforum.com/forums/c1-and-c2-corvettes/2470479-1966-j56-brake-option-clarification-needed.html

[Robert K.]

Re: AIM Identification for J56 support bracket and caliper

Joe,

As always, thank you for the details regarding the bolts. This will help me........

It just seems so strange that there isn't a document which shown the mounting/bolt details and how it all fits together (as there is for almost every other part/assembly on these cars).......

I guess sometimes you just strike out........

[Joe L.]

Re: AIM Identification for J56 support bracket and caliper

Joe,

As always, thank you for the details regarding the bolts. This will help me........

It just seems so strange that there isn't a document which shown the mounting/bolt details and how it all fits together (as there is for almost every other part/assembly on these cars).......

I guess sometimes you just strike out........

Robert-----


Oh, I'm sure that very detailed documents and drawings for this assembly at least at one time existed. The problem is that such have never been generally available. I expect that part of the reason for that is that very few Corvettes ever had this feature and, even for those that do, there really exists very little need for such information. The needs of later day Corvette restorers probably didn't even cross the minds of GM managers when these cars were designed and built. We're lucky to have what we do have.

[David B.]

Re: AIM Identification for J56 support bracket and caliper

Have a couple of Lay out prints regarding front & rear calipers for the Corvette. Prints are quite large and faded. Is HD calipers 5463820-21 what you are referring too? To help answer any questions part numbers if possible really help reduce time and aids in accuracy.

[Robert K.]

Re: AIM Identification for J56 support bracket and caliper

David,

Part #'s 5465952 & 5465954 are the part #'s that I have questions on how and with what type of bolts they were attached to the car........

I think that the part #'s you referenced (5463820-21) are from a C1 - mine is a C2 ('67)

Thank you,

[David B.]

Re: AIM Identification for J56 support bracket and caliper

Robert'
No C1,s that I am aware of were ever built with disc brakes I quoted the HD numbers off lay out print # L-91771 I believe they are plant assembly numbers not readily available. First drawn 8-4-64 and updated with revisions thru 1974. The print does list all bolts with specs and part numbers including torque specs. My problem is trying to figure out what bolts you are interested in.