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154 1301 11 Five Speed Overhaul Part 2 Royal Purple Fluid Install

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With everything buttoned up and the RTV cured, it was time to put fluids in the cases. The NV3550 doesn’t deal well with regular GL-5 gear oil, since the high sulfur content is said to eat the synchros and bushings. So we filled the transmission with Royal Purple’s Syncromax. The T-case also benefitted from Royal Purple’s Max ATF before being slung into the Jeep.