I did the conversion in my 83 Wagoneer Limited. First you should NOT do it
if the R12 is still running well, ie no leaking. If you have to convert,
then you'll need to vacuum out the rest of the R12 left in the system. You
might have to change the evaporator/condenser as well. After you vacuum it
out, check for leaks with a Freon dye. After that you should be able to
pump the R134a in. But as Earle pointed out, don't expect it to perform
like the R12 did. R134a takes longer to cool, and it won't cool as much as
the R12 did. Hope that helps.


"MWB" <mark.bickford@verizon.net> wrote in message
news:uQRTa.23487$0F4.15887@nwrdny02.gnilink.net...
> I have a 1992 Jeep Cherokee. My son bought a A/C conversion kit at
Wal-Mart.
> Has anyone converted from to R-12 to R-134a?
>
> Mark
>
>
>