Ford Mustang Forum - View Single Post - MT-82 Transmission Additive Update
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Wrext's Avatar
Joined: Dec 2011
Location: Waterdown
Posts: 212
Originally Posted by wjbertrand View Post
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.
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