1994-1996 Depending on manufacturer.
Febraury 31st, 1892.
1993-95 for most.
R134 .... IS freon.
You do not want to buy Freon as it is very, very, expensive. Have the leak repaired, the system purged of all Freon R12 and the oil. Have it converted over to R134 refrigerant. You cannot just add R134 as the oil used in R12 is not compatible with R134. You will be money ahead by converting it.
R134
There is no need to ever change the refrigerant which is R134 and not Freon R12.
To convert an R12 system to R134 all of the R12 will have to be removed. The system will have to be completely flushed out then special additives installed. This is done due to the way the different Freon's react to the systems gaskets. After this is done then the system is ready to be set up with new Freon.
R134
THERE IS NO FREON IN A 98 IT IS R134
They should never be mixed.
Initially used R12 . Almost impossible to get. Probably will have to change to R134
R134