97 manual 5 speed lubricant

[bavrit]

Has anyone tried Lubricant Engineers 7500 monolec Power Fluid for the 5 speed transmission? It has not been rated but Clay from Lubricant Engineers swears by it... He touts it as good for the manual transmission. .

 

[Bob Beauchaine]

I've heard of LE and they are highly rated in the lubrication business. To me the real question is it rated as a GL4? There are a lot of guys using Amsoil Synthetic GL5 and are happy with it. I am using Pennzoil GL4 full synthetic in mine and New Venture recomends Castrol Syntorq GL4 which is available through Dodge at about $25 per qt. You can also buy the same fluid from GM for about $13 per qt. There was an article in our TDR mag a few issues back about this very thing. Standard Transmission did some research and found that behind our mighty Cummins the NV4500HD can generate some high heat that can fry a non synthetic gear lubes. I'm sure you will get a lot of feed back on this question. :-{} Good luck on whatever fluid you decide on.

Happy trails

Bob

 

[amsoilman]

I would definately stay with a synthetic gear lube, but if it is not a GL-4 rated, just make sure it has the MT-1 rating as well. The MT-1 rating indicates it has additives within that address the concerns of "Yellow" metals. The true synthetics will run cooler.





Wayne

amsoilman

 

[PUMPERDUDE]

Give Standard Transmission a call. They had the best price arround. Order you a gallon of Syntorq. Changed mine @160k. Clean as a whistle. The stuff works. Standard knows it. At 350K I'll do it one mo time

 

[Joseph Donnelly]

Kevin Dinwiddie of LE (Oil Man on the TDR forum) recommends Castrol Syntorq for the NV4500. He said that the LE power fluid is excellent in the transfer case and power steering.

 

[Sled Puller]

This a good thread:



https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=33338:--

Gene

 

[Don M]

Standard Transmission in Ft Worth has the Castrol Syntorq for 54 bucks a gallon or right at 60 bucks shipped.

Not a bad price for a good oil that is recommended and proven in the NV4500.



Don~

 

[LarryB]

I think the most important tool in running these trannies is the temp gauge. You could run bean oil and it would work if you kept the temp low. If the gear pressure is more than the oil can stand then you get heat. Too much heat generated and not enough heat dissapated and you have heat buildup. Heat makes oil lubricate less. More heat generated, more heat buildup, less lubrication, a viscious circle. Larger oil capacity itself does nothing to dissipate heat, just store it. A cooler for better dissipation, better lubrication or less torque(pressure) are the only things that can help. You must balance the energy generated by friction with the energy dissipated in heat to keep heat from building past the temp the oil begins to fail. This point can vary with oils. A guage allows you to find where this point is.



FWIw

 

[redram]

Royal Purple MaxGear 75W90 Synthetic gear oil, available from Jeg's and some corporate Napa's for about 8/ qt. It's rated for both GL4 and GL5 due to the non corrosive additive packages.



I've got plus 100K on it on my 138K 96 3500. A friend of mine has 250K+ on a 96 4X4.



It's good stuff.