GregO
Well-Known Member
Motorcraft XL-18 additive could have caused this.I noticed that coating on the synchros was gritty like sandpaper and easily rubbed off on my fingers. The inner bearing race on the input shaft also looked like this. I don’t know if this was caused from the factory fluid or not,
I changed out the factory fill at 18k miles to get the stinky reactive XL-18 out.
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