Quote:
Originally Posted by abig84
i see this post come up time to time on forums, and there are some strict converting people who say you have to change a bunch of crap and flush the system, when i did mine in my 1990 silverado, the system was empty, i put a set of fitting adapters and filled it up with 134a freon and been fine for the past 6 years
there is a difference of how much you put in compared to the old stuff, something like 15% less or more i forgot, im sure a quick google search will show you what you want to know
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134A takes less. Usually about 10% less. I'd just use a standard flush kit and be sure to use the proper oil when you refill.