Can someone help me answer this?!
 

In the 1950s what was the name Of the aftermarket hydraulic device Used in dump trucks which became the theoretical precursor Of the 60s era line Lock made by Hurst for dragracing And then adapted to stunt driving in the early 1970s. We need a marketing name of this device. HINT two words both starting with same letter. Thanks!

Re: Can someone help me answer this?!
 

I'm gonna go with "Hill Holder"

Re: Can someone help me answer this?!
 

Some 50's and even 60's trucks and farm equipment had "Micro locks" on them......not sure if that's what you're looking for.

Re: Can someone help me answer this?!
 

Line Lock

Re: Can someone help me answer this?!
 

I didn't think it would be line lock since they used that in the question. Hill holder sounds good. It's for a $500 discount to Rick Seamen Stunt Driving School in Rosamond, CA.

Re: Can someone help me answer this?!
 

mico brakes, i remember the old ups trucks i drove in the early 70s all had them, VERY unreliable, ask me how i know

Re: Can someone help me answer this?!
 

haha thanks.. micro brakes is probably what they were called but I need the marketing name and the hint says it is two words, same first letter in both words which is why Hill Holder makes sense.

Re: Can someone help me answer this?!
 

DUMP & RUN sounds good

Re: Can someone help me answer this?!
 

Lever Lock

Re: Can someone help me answer this?!
 

x-2