The 134a will normally cause a 10% (more or less) decrease in cooling
capacity.

EXTREMELY IMPORTANT......thoroughly flush the old oil out of the system, and
make sure there is NO R12 left.

R12 is very antagonistic to R134a compatible oils and can cause a sludge
build up that will kill the compressor. (depending on how much, etc.)

DJR


"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
>
>
>