Hey guys,

I was thinking today and I decided it would be very convenient to have a sight glass in my nv4500 fill plug and my nv241dhd fill plug. Maybe eventually the front and rear diffs as well. Now I know from Mike's thread that the trans fill plug is 3/4 npt. What I don't know is, the t case fill plug size, and diff fill plug size. I'm also wondering if anyone has input on anything special to look for or avoid with a sight glass for this specific application? Also, anyone have a good source for these?

thanks!

The hose will only bend so far before it pinches and then that would be bad.  Plus I cant have it pointing straight up and down because then the fluid will always fill the entire length of the tubing due to the height of the fluid level kinda proving pointless unless the fluid level drops well below safe.

So I ended up with a radius curve to allow a real time constant visual confirmation of the fluids level and condition.  Seems to work.....

Important to point out is that this isnt your everyday poly tubing you find at the hardware store but rather FEP tubing which is rated -100*F to 400*F.

Just thinking out loud but you could put a tee in the bottom and use that for a drain and not mess with the fitting.

Very true.  Good thinking.....but how would I fill it back up?   I guess I could put a tee on top too.

Really what I planned on doing was later on converting half the fittings to JIC so I can easily take off the hose, but after searching for weeks on end I was getting bored of trying to configure something from internet pictures and just needed whatever I could get to mock up what I have.

I was just taking it one step at a time. Filing it would have come to me. Might have meant one more trip to the hardware store. Where did you get the FEP tubing?

This is where I got the FEP.  http://www.mcmaster.com/#