Pin tumblers are little pins held in place by a spring .... mostly popular and apparently harder to pick than the wafer type, best to ask a pro that one,.... wafers are similar except they are pieces of metal with the shape cut out of them... same spring system tho.
Most cars ?? seem to use the wafers as they allow the double sided key...
You take the tumbler to the locksmith with th ekey you want to fit it and they do it, mostly immediately as they have the gear..... if american locks were so different then WHY did it only just happen when other cars don't have this problem with (usually) the same parts.
I have an XJ (4l), the rotor button and Dist cap are GM and thats only the start of it ... go figure.. the alternator appears on others (pulley dirrerence maybe)..
(We also have a SAAB and th wiper motor is from Korea (fiat, hyundai, etc, etc).....
sounds like en excuse to simply charge more to key the lock.
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There are 4 wheel drives, and there are Jeeps... seems I found out too late in life.
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