[FederalQ]

Penzoil Synchromesh transmission oil is what I understand is popular in the NV5600. I believe that's something like a 70W-80 grade GL 4 lube. Information I have on capacity is 9.5 pints.

Redline offers MTL which is full syntethic transmission oil, if you'd want to go that route, albeit more expensive. I'm sure there are more options for fluids.

 

[JasonY]

I would stay away from "syncromesh" fluids. They are too thin(hence why they shift smoother) but dont protect the transmission the way they should.

Redline and Amsoil make the best fluids imo, id go with whichever is easiest to attain locally.

Jason

 

[carson b]

i have a 6 speed and i had a trany guy and the guys down at bd diesel tell me to go to the dealer and get the dodge nv5600 fluid, they told me that the six speeds are vary finicky and i have go to both of thees shop many times and for both of them to say go to dodge i trust there judgment

 

[CoalRoller]

The nv5600 (6 speed) does not use the same fluid as a nv4500 (5 speed). 5w30 Syncromesh is what it calls for. I have amsoil 5w30 syncromesh in mine.

 

[FederalQ]

Just remember, 5W-30 grade has nothing to do with transmissions, that is an engine oil grade. The 5 speed NV4500 actually takes a heavier grade than does the NV5600 which is 75W-85. Manual transmission lubes are different from other hypoid gear lubes, as they contian the correct amount of friction modifiers to make the synchros operate properly, and have 1/2 the sulfur and phorphorus that is more friendly to the yellow metals found in transmissions.

It has been my experience, that gear lubes for the NV5600 are more readily available than those for the NV4500. Simply trying to be helpful, and not a marketeer for a particular brand. Cheers.

 

[CoalRoller]

Just remember, 5W-30 grade has nothing to do with transmissions, that is an engine oil grade. The 5 speed NV4500 actually takes a heavier grade than does the NV5600 which is 75W-85. Manual transmission lubes are different from other hypoid gear lubes, as they contian the correct amount of friction modifiers to make the synchros operate properly, and have 1/2 the sulfur and phorphorus that is more friendly to the yellow metals found in transmissions.

It has been my experience, that gear lubes for the NV5600 are more readily available than those for the NV4500. Simply trying to be helpful, and not a marketeer for a particular brand. Cheers.

:banghead: I couldn't care less what brand you use but just stick with an approved fluid. I'm pretty sure I didn't put engine oil in my transmission either.