EndlessMtnFab
Well-known member
It's pretty well known that D300s leak a bit at the rails when flipped. While I absolutely love the MidniteMetalworx case .... I don't have the spare cash for it for my Jeep build. Still need a doubler --- but that's another story.
It's also been somewhat established that leaks are considered un-avoidable. I'd like to challenge that concept and could use some input on my thoughts.
The most common fix is the double-lipped seals in the shift rail house (or bearing cap as some diagrams label it). IMO .... new rails are a must. Whether stainless, or a fancy coated steel, they need to be smooth. That's self-explanatory, but it doesn't always solve the leak. There's enough fluid pushing thru bores of questionable tolerance.
So here's my crazy thought. Why couldn't brass / bronze liners be machined to fit in either the rail house or into the bore of the case itself (maybe even both)? Much like how you can run tighter tolerances on engine valves with exhaust guides, my thinking was to tighten up the slop/clearances so the less oil can even work down to the new double-lip seals.
Don't get me wrong .... I still want a new case. But I am hoping this idea could tide me over and let me use the money for other parts I have not yet acquired.
Any thoughts .... or should I just go fuck myself?
It's also been somewhat established that leaks are considered un-avoidable. I'd like to challenge that concept and could use some input on my thoughts.
The most common fix is the double-lipped seals in the shift rail house (or bearing cap as some diagrams label it). IMO .... new rails are a must. Whether stainless, or a fancy coated steel, they need to be smooth. That's self-explanatory, but it doesn't always solve the leak. There's enough fluid pushing thru bores of questionable tolerance.
So here's my crazy thought. Why couldn't brass / bronze liners be machined to fit in either the rail house or into the bore of the case itself (maybe even both)? Much like how you can run tighter tolerances on engine valves with exhaust guides, my thinking was to tighten up the slop/clearances so the less oil can even work down to the new double-lip seals.
Don't get me wrong .... I still want a new case. But I am hoping this idea could tide me over and let me use the money for other parts I have not yet acquired.
Any thoughts .... or should I just go fuck myself?
Last edited: