No, definitely not...xantia sx auto wrote: the gearbox place put dexron 6 in it, to me that does not seem right. too thin?
An autobox of that age will want Dexron II mineral oil and will likely not like anything newer if the 4HP18 in the XM is anything to go by... Dex6 will likely be synthetic and whilst supposedly backwardly compatible that is open to debate..
As a general rule an autobox should only ever use the ATF it was originally specified to use.
Genuine Dexron II is still available and quite cheap. Don't be fobbed off with what the gearbox place wants to flog you!