Hi Chuck,
BTA 940 was the factory competition axle, and the late model disc wheel 
axles were BTA 806.
John
Charles Christ wrote:
>what is the latest cast onto the axle shaft end number for the hardest 
>perduction axles?
>BTA?    i'm having an early into the senior years moment moment here.   just 
>plain forgot!
>my car has a  set of the 70's german made rock hard "break proof" axles wich 
>the diff will strip it's gears before an axle shaft will break in it so i do 
>not have an easy refrence sitting here now.  i met a guy this past weekend 
>with a bugeye from baltimore are who's car revels specman's bugeye in 
>orgininaliy , in no rust and darn shiney black showing not 1 wave in it's 
>flawless black finish racing in last weekend's hillclimb.     he'd like me to 
>email him axle hardness info.
>
>chuck
 
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