Rear control arm cross member and hangers

[Guest Brian 75 280]

I have a 75 280 and the rear control arms mount to a cross member which is attatched to two long hangers that attatch to the chassis. I believe this is the same set up that is in the earlier models. I have always wondered why they are so flimsy. Has anyone tried to fabricate new hangers or stiffen the old ones? It seems that under very hard cornering, you could get a considerable amount of flex. Any comments would be great!!!

 

Brian 72 280

[Guest needwaymorespeed]

Brian I believe the part youre referring to is called the differential uprights, I think youre right on track with wanting to strengthen it, Terry Oxendale-aka blueovalz-has a great writeup on this exact subject,his car is featured here in featured cars or members rides-TRULY BEAUTIFUL!!!-

I dont know the web address offhand but I bey its under our links section or the links found on Pete Paraskas site-another NICE car in the works.

 

later

Curtis

[BLKMGK]

Thgose two "flimsy" pieces that hang down are actually supposed to be hardened steel! When I bought the aluminum brace for my car it came with a pair of those already drilled as I was advised drilling that metal would be "a challenge" for the normal bit. It might not be quite as flimsy as it looks. Just got mine back from th epowder shop - looks good!

[Dan Baldwin]

Don't worry about them, they're stiff enough in the directions that matter. They would be flimsy in reacting fore/aft loads, but those loads are taken at the forward control arm pivots. In lateral and vertical stiffness, those flimsy hangers are very stiff.

 

Dan Baldwin

'71 240Z 3.1

COMSCC #7 SPB

[blueovalz]

I'll try and get a pic or two of the plate I use out here. I've had several requests for this, but am unable to paste one on these replies. I sent a note to Pete to see if he could help me.

 

Terry

[BLKMGK]

If you'd like shoot the pic my way and I'll host it on my site for awhile.

 

I've just begun bolting my rear suspension back together after coating - the rear brace I'm going to run just clears my cell and should really help stiffen up the two plates in question but the foreaft loading is still not real stiff. Thankfully it shouldn't see loads like that! For the price, that back brace is very nice even if you choose not to run a finned rear cover IMO...

[blueovalz]

Well, here goes. Pete and BLKMGK both have been a tremendous help in getting me to a point where I could send this photo of the rear plate. Hope it works.

(img)http://albums.photopoint.com/j/View?u=1541023&a=11690373&p=41549393(/img).

 

Terry

[blueovalz]

imghttp://albums.photopoint.com/j/View?u=1541023&a=11690373&p=41549393/img

[blueovalz]

Well, I guess the image did not show up like I thought it would. Any you can use this URL to get you to the picture. http://albums.photopoint.com/j/View?u=1541023&a=11690373&p=41549393.

[blueovalz]

Sorry guys, If I copy and paste the URL, it works fine. If I freehand type the same URL or use the URL in the above reply, then I get an error message like I would guess you are too. I'll try to get this thing fiqured out.

 

Terry

[blueovalz]

http://albums.photopoint.com/j/AlbumIndex?u=1541023&a=11690373

[blueovalz]

http://albums.photopoint.com/j/AlbumIndex?u=1541023&a=11690373&p=41549393

[DavyZ]

Both of these seem to work, Terry. Thanks for posting them. The pictures help a lot of people here--many never even post!

 

Cheers,

David

[BLKMGK]

Hey Terry - aren't those the ones you wanted me to post on my page? They're up and I've sent you links

[Guest Brian 75 280]

Thanks for the imput on the hangers. I was able to see the pics and that aluminum bracket is sweet.

 

Brian 75 280

[Guest Brian 75 280]

Blueovals, did you draw up any plans for that rear brace assuming that you fabricated it yourself. I would love to attempt a project like that.

 

Brian 75 280

[blueovalz]

I did not draw up any plans, but this was one of the more simple things that was done to the car. Basically it started out as a rectangular plate held on by 4 bolts (original upright bolts). And this would have been quite sufficient, but at the last minute I added the end pieces so that I could use the mustache bar bolts too (not necessary for strength though). Very, very, simple, and the neat thing was that all the stuff that bolted up to it was perfectly aligned. But, I did have the differential mounted perfectly horizontal, just like the transmission output shaft centerline. It is important to have the centerlines of the diff and trans parallel.

 

Terry