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I just bought a used CTD with about 105K and I'm not sure if the 6-speed tranny fluid has ever been changed. I know that automatics are picky about oil...the old oil gums up and kinda holds things together if it isn't changed for a while. Then, if you decide to change it, you start having problems. I dunno about manual trannys, though. Anybody know if it'll start giving me trouble or if there is a good way to do this?
it is basically gear oil. could not hurt to change it if you are towing and putting a load on it, otherwise it is a manual transmission and you do all the work on it.
I am thinking seriously about using the Royal Purple syncromesh (i think they call it). Anybody use it? I get a pretty decent price on it here on base.