I do not know if anyone still sells those hard-shifting bronze rings, but those things shortened the service life of most transmissions they were used in. To get around the specific lubricant requirement, there was a couple of Asian companies making bronze synchro rings. The list of incompatible lubricants includes ALL GL5 or GL6 rated conventional and synthetic gear lubricants, plus most GL4 gear oils. The carbon fiber lined NV4500 synchro rings used as original equipment and by most rebuilders are only compatible with lubricants that SPECIFICALLY meet one or more of the following standards: GM 12346190, Chrysler/Dodge MS-9070, 46375459. New Venture NV4500 5 speed transmissions use synchronizer friction rings that are lined on the inside with carbon fiber facing material.
REDLINE GEARBOX OIL REVIEW MANUAL
In operation, QU90020 equals or exceeds the performance of the original Castrol LT® oil for New Venture NV4500 5 speed manual transmissions. Our Redline QU90020 75w85w GL4 Manual Transmission Oil specifically meets the GM 12346190, Chrysler/Dodge MS-9070, 46375459 specifications. Castrol discontinued Syntorq LT® a few years after NV4500 production ended in 2006. It was not an extreme pressure rated lubricant so it is not suitable for use in the hypoid gear axles found in almost all light trucks. Syntorq LT® was also used by many import car manufacturers with various other manual transmissions.
REDLINE GEARBOX OIL REVIEW UPGRADE
Need More Info? Use the handy Links below to access over 40 years of Dan's product and vehicle specific Tech Notes to easily get the information you need for your vehicle's repair, maintenance, or upgrade project!Ĭastrol Syntorq LT® was a low-temperature rated, 75w85w GL4 synthetic oil formulated specifically for the New Venture NV4500 5 speed manual transmission used in Dodge and GM light trucks. QU90020 is a full synthetic, API Service GL-4 manual transmission lubricant specifically formulated for smooth shifting and outstanding protection under a wide range of operating extremes including low and high temperature conditions.
QU90020 MT85 75w85w NV4500 Manual Transmission Oil is a 75w85w Full Synthetic, GL-4 Manual Transmission Gear Lubricant formulated by Redline that replaces the now out of production, Castrol Syntorq LT® oil in New Venture NV4500, NV4500LD, and NV4500HD manual transmissions.
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