I'm running a '96 Dodge NV4500 behind my 4BT. I'm a little confused on the internals of this tranny. Several references I've seen say it has Carbon Fiber synchros. Other tranny/gear repair & parts shops on the net refer to the synchros as being the more common brass type.
Some sites explain the need for the $pecial NV4500 lubricant being that anything else can dissolve the C/F snchros. Maybe it's just me, but I can't see how carbon fiber is able to hold up in this extreme stress application for synchros. Even brass takes a beating over the years, and the NP 435's aluminum synchros take some noteable wear.
The two reasons for this post: are NV4500 synchros C/F, or brass? Is the reason for the lube spec because of synchros, or because of seal/lube compatability? I used a Valvoline synthetic lube and have some weeping at my rear seal....
Some sites explain the need for the $pecial NV4500 lubricant being that anything else can dissolve the C/F snchros. Maybe it's just me, but I can't see how carbon fiber is able to hold up in this extreme stress application for synchros. Even brass takes a beating over the years, and the NP 435's aluminum synchros take some noteable wear.
The two reasons for this post: are NV4500 synchros C/F, or brass? Is the reason for the lube spec because of synchros, or because of seal/lube compatability? I used a Valvoline synthetic lube and have some weeping at my rear seal....