So I was getting some new tires put on my 60 Chevy Sedan Delivery on Saturday... So I was at the D*^$*&^# Tire here in town... So I see the car is on the ground and walk out the door to look things over. Just as I get to driver's rear of the car, I see the torque wrench fling forward... and the new chrome lug bounce off the floor. The kid grabs the lug and starts looking like how did that happen... So the guy that helped me walks by , and I point out the his install guy just busted the stud off my car... So I ask him what setting is the torque wrenches set at... I get a reply 90 LBS foot pounds... Whoa, now if I'm wrong let me know... I don't even tighten my rims(foreign cars) nor my 1951 Woodie to that spec... like 80 LBS foot pounds tops... I show him the shank washer which isn't flat any longer... and then a old one that they took off( new hardware) He tells me the stud was old and brittle it happens... so if I'm wrong I'll eat crow... but 90LBS foot pounds seems extreme.. they are going to make it right and fix it the stud... ??? sorry to rant guys !
I should say the American Torque Thrust D's I have are first re-issues from the early 90's(1991) these don't use the taper style lug nuts like new wheels have now.. These use the shank style lug nut and washer.. direct bolt pattern...I should post a picture of the washer...I asked a couple of guys at a car show today and got different answers "whoa to much" "90 sounds right" "80 sounds right ?? interesting .
75-80 is what AMR told us years ago when we ran a tire store. Don't believe a stud should break at 90 though which would concern me. Maybe the stud had been stretched before and was weak. For the cost of studs I would replace them all with new ones just for peace of mind, but then my friends all say I am ****!!
thank you guys... they are going to pay for the repair... ... good to know, learned something today ! 1/2" 90 and 7/16" 75....
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