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Unread 05-17-2014, 05:55 AM   #1
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2005 WK 
Join Date: Nov 2007
Posts: 213
Hecho in Mexico brake calipers/05 WK GC

Noticed my wife's grocery getter Jeep with 60K miles wasn't stopping worth a cr*p..inspecting the driver's side caliper I saw the top piston with a 3/4" piece broken off at the top and the piston itself frozen in the bore. Boot was intake, I flush the brake fluid every year (7K miles for this vehicle). I get the feeling these plastic pistons have a tendency towards hanging up...this Jeep's rear driver's caliper came from the factory with a "frozen" piston.

Do today's $50K GC's still come with plastic pistons ?..my 86 Audi had stainless steel cups !

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Unread 05-18-2014, 02:33 PM   #2
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2005 WK 
Join Date: Aug 2009
Location: Hotels, USA
Posts: 1,377
I'm sure they do. The metal style pistons have a tendency to transfer heat to the brake fluid a lot faster than the plastic ones. My Wrangler had the plastic pistons as well.
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