hi i need a new rag joint and i dont know which one i need. i have manual steering and they have available is with lower flange type and non flange type. i do know that i have the flat spot key.
thanks in advance
This is the part number for a Corvette manual gear flexible coupling. It has the flange with a flat to attach to the gear. I am pretty sure that it is the correct flexible coupling for your A-car manual gear.
GM Part #7818568
It should still be available through GM dealers and from GM Parts Direct.
From what I can see from the various Corvette supplier catalogues, it appears that most of them are now selling the off-shore (say Chinese) copies of the Saginaw flexible coupling. Some have resulted in your steering wheel ending up upside down.
Actually the screen that is molded into the face of the rubber disc is there for electrical continuity (so you can blow your horn.) The wire mesh really doesn't add any strength to the part. I was the engineering supervisor over the flexible coupling product line back in the 1970s. Laboratory durability tests did not show any increase in cycles during life testing.
Sorry about those little wire ends that stick out from the disc. I got many pokes myself.
The aftermarket is probably using old tire carcasses. I actually had a guy call on me that wanted to supply discs from old tires. They are probably ground to 0.38 inch thick but they have that original tire curvature molded into them.
The parts that were purchased for our flexible couplings were molded in big sheets and then die cut. The cloth had to lie with the warp and (woof?) in the correct direction. We had discs with 4 layers (plys) of neoprene rubber and cotten cloth for power steering vehicles. We had discs with 7 layers of rubber and cloth for manual steer vehicles.
The 7 layer discs were much stiffer because both discs were 0.38 inch think. Therefore, the 7 layer parts had much less rubber and a lot more cloth. I really don't believe that the 7 layer discs were any more durable than the 4 layer discs.
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