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Front Control A Arm Question

Any difference in sizes/dimension between the pre 71 vs 72 and later A arms? I am aware of the sway bar drop down mounting differences. I need the open tabs for the drop links and don't think there's any other differences but wanted to confirm before purchasing.

Thanks

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Old 02-12-2023, 06:54 AM
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Walt Fricke's Avatar
 
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Well, the '69 and earlier arms are quite different than the '70-89 arms. Not interchangeable unless you change the strut. Your "pre 71" is thus confusing. You can download Porsche's parts catalogs to compare part numbers and parts drawings to check for details. All I recall is a change somewhere in there to the pin holding the ball joint to the strut base. They all used the through the body sway bar mounting until '74, but '69 and earlier used a bolt on sway bar A arm mount, while the later through '73 had the tab welded on.
Old 02-12-2023, 03:08 PM
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Buy the U tab kit from Elephant, cut the later style off your 86 and weld on the new U bracket. Why change the entire A arm? That's way more work, even if you remove it from the car.
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Old 02-13-2023, 04:47 AM
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Current control arm is bent and going in the garbage(already has U tab by the way). Need a new one. Instead of buying a new arm, cut off the mount and weld on a new u tab figured I’d buy a 70-73 arm.

Easier

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Originally Posted by 75 911s View Post
Buy the U tab kit from Elephant, cut the later style off your 86 and weld on the new U bracket. Why change the entire A arm? That's way more work, even if you remove it from the car.
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2007 GT3 RS Orange/Black
1986 911 Carrera White (dedicated race car #23)
Old 02-13-2023, 04:59 AM
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You already have an aftermarket sway bar mounted through the body? With spherical bearings on each end of the drop link? What manufacturer? If the U tab is a bit wide for what you have, easy to shim with washers, or fancier stuff if you have a lathe. You could ask the manufacturer if his rod ends will fit the stock tab on these early arms.

But you have a U tab coming. Can't you just find the best price/most convenient arm from 70-89, and go from there. Cutting off what's there if it won't work isn't going to be difficult, and welding the U tab on is no big deal. I think you'd find the ones through '73 the easiest, but compared with all the other work involved, no big deal whichever you purchase.
Old 02-13-2023, 12:04 PM
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Thanks Walt. Yes through body sway bar and my current set up even has spherical bearings/spacers on the drop link ends. I ordered a 70-73 arm which should be a direct replacement.
I’ll see you at the VIR race hopefully.

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Originally Posted by Walt Fricke View Post
You already have an aftermarket sway bar mounted through the body? With spherical bearings on each end of the drop link? What manufacturer? If the U tab is a bit wide for what you have, easy to shim with washers, or fancier stuff if you have a lathe. You could ask the manufacturer if his rod ends will fit the stock tab on these early arms.

But you have a U tab coming. Can't you just find the best price/most convenient arm from 70-89, and go from there. Cutting off what's there if it won't work isn't going to be difficult, and welding the U tab on is no big deal. I think you'd find the ones through '73 the easiest, but compared with all the other work involved, no big deal whichever you purchase.
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2007 GT3 RS Orange/Black
1986 911 Carrera White (dedicated race car #23)
Old 02-14-2023, 05:17 PM
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Old 02-14-2023, 05:55 PM
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