I thought the XL-18 additive was now being discouraged because it might have long term harmful effects on the synchros. I would not mind trying it, the $23 is worth the experiment, but if it negatively affects the longevity of the synchros, then no way.
My transmission mostly shifts fine but that 1 -> 2 nibble is there most of the time, weirdly, particularly when turning left.??? Makes me wonder if the transmission torques out of line with the shifter a bit during a left turn.
Deysha can you confirm whether use of XL-18 is now thought to be harmful or not?
Who's you source on it being harmful? I haven't heard this!
2012 Mustang GT, Lava Red Metallic, Brembo, 401A, Cashmere leather, pedestal spoiler and hoodscoop. Mods - Boss shift knob, Weathertechs, GT fender badges, Steeda Ultra-lites/Tokico's D-specs/Steeda HD mounts & phb/GT500 iso's, 20% tint, Steeda UCA, Roush Axlebacks, Bassani X-pipe, no reso's, Painted lower valances, Boss mudflaps, MMD hood struts, MGW shifter, 275/40R19 Michelin Super Sports all around, Whiteline Sways/LCA's/Brackets, Steeda CAI, Bama 93 tune.