Quote:
Originally Posted by 40 to 332
To the group ... I recall many years ago reading something about synthetic transmission fluid not be compatible with the seals in the tyranny (???). Presumably this was just rumour ... or improvements have been made in the fluids and/or seals. Can someone please confirm? I'm thinking of switching to synthetic in the new couple of weeks. Thanks!
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Synthetic is okay, but no GL5 for the transmission as it is bad for the synchros, use GL4 instead. You can use GL5 in the rear end.