72455

Hey all when I bought my 72 Supreme there was no bumper jack so I'm in the process of replacing it. I have all of the hardware and the complete jack assembly. I'll be using a 15 inch SSIII wheel for my spare. My question is can anyone tell me how or post a pic of the proper placement for the hook and the base and how to secure them?
Thanks,
Dave

Dave26

joe_padavano

And of course, you'll need this:




And two of these:

72455

Already got 'em😀...
Which brings me to another question...if my car came with plain steel wheels originally, would there still be the mounting tabs in the trunk for where the clips for the jack handle would go as illustrated in the pics above? Or were the tabs only installed if cars had Super Stock wheels?

Dave26

72455

Hmm...after taking a second look at the setup for the SS wheels, it looks like the clips for the handle are bolted directly to the trunk pan. If that's the case, I dunno if I'm Keen on the idea of drilling holes for the bolts, so I may have to figure something else out. Is there any reason why I can't stow the handle the as shown for the plain wheels?

Dave26

The SS wheels use a "lug nut" type of hold down through one of the lug holes.....I use the jack handle to tighten the spare in place, so I need access to the handle. The steel wheels use a "wing nut"and jack base to hold the spare in place....the handle isn't needed to tighten down the spare. I assume the SS hold down is done this way to keep from scuffing up the wheel.

Allan R

Dave,
As mentioned to you already in another correspondence, the J hook for the hold down nut is shorter than the stock one used to hold down steel wheels. Don't worry about drilling holes for the clips, GM never worried.

72455

If anyone that has a 72 Cutlass Supreme with SS wheels could give me the measurements for the distance between the holes for the jack handle clips, I'd appreciate it😀

Dave26

This is from the Assembly Manual.....It's tough to read, I'll send some pics of my Supreme's clips & measurements

Dave26

4” From pan seam

9.5” & 16” from latch strike assembly

Allan R

Now all we need is the distance between the 2 clips

Dave26

droldsmorland

I thought on 68-72s the tire iron clips mount on the 45* slope, not on the horizontal shelf...Im using 68-69 as the reference.

Yes SS1-3s have this setup. Steel wheels with hubcaps use the cardboard cover and the tire iron is under the spare secured with a rubber sleeve on the jack. See the Fusick catalog for those details.

https://classicoldsmobile.com/forums...-68-442-a.html

72455

That's my question too...does the handle mount to the "slope" or on the "shelf". The jacking instruction decal seems to show it mounted on the slope, but in Dave26s pics, it looks like it's on the horizontal shelf, so where exactly does it go?

Dave26

72455

[QUOTE=Dave26;1144036]So yours is on the horizontal shelf?

joe_padavano

The 1969 PIM shows the location of the drilled holes for the clips on the slope, with dimensions provided in PIM Section 0, drawing no. 146. The 1970 PIM also shows the clips on the slope, but the diagram for spare tire stowage in Section 10 says to "drill at dimples" in the trunk floorpan. There is no drawing with dimensions in Section 0 of the 1970 PIM.

Dave26

[QUOTE=72455;1144070]Yes, mine is on the horizontal shelf.

72455

[QUOTE=Dave26;1144087]Ok thanks. I think I'll put mine on the slope.

droldsmorland

[QUOTE=72455;1144070]EDIT....Nope its on the slope.

Dave26

joe_padavano

Was this car factory-ordered with SSII/III wheels, or was this possibly a dealer installation?

Allan R

Actually putting it on the horizontal shelf makes a lot more sense than the slope. The handle and clips are out of the way from loading a tire into the trunk and hitting the clips which would otherwise have been on that slope. Just my opinion.

Dave26

72455

Now that you mention it Allan, that does make sense. And from what's been discussed here, whether it's on the slope or on the shelf, either way would be correct, right?

joe_padavano

I don't know how you inferred that. "Correct" is what is spelled out in the factory documentation. The factory engineering drawings reproduced in the PIM are what were used to assemble the car on the assembly line. All of them show the clips on the slope. Unless there is a Dealer Service Guild bulletin that changes the location of the clips, on the slope is "correct", meaning built the way the factory engineers designed it. If you don't care about that, then put the clips wherever you want.

72455

I want it it to be right, that's why I decided to put them on the slope. The reason I asked that question was because Dave26s is on the shelf and nobody seemed to question it, so I just wanted clarification.
Thanks Joe,
Dave

72455

Does the jack post/mechamism just "lay" under the tire?

joe_padavano

Yes. The tire clamps the jack in place.

72455

Thanks Joe...

72455

Question...if the tire clamps the jack in place, then it seems to me the tire doesn't sit flat on the trunk floor. Looking at the diagram, it looks to me like the base gets '''wedged" under the tire. If the tire doesn't sit flat, how does the base stay in place?

Dave26

72455

Thanks Dave...after I posted that question I thought about it and figured it out. Now I have another question...where does the "danger" sticker for the hook go? I'm thinking it should be at the top of the hook right above the rubber pad...am I right?

joe_padavano

I'll add that the tire is flexible. As you clamp it down, the sidewall deflects to conform to the irregular shapes.