NV4500 gear oil
 

I was needing to add a little gear oil to my nv4500 and I was wondering if royal purple will work and can I add it to whats already in it? Also what weight oil do I have to use?

not sure on the weight but know its good stuff .. run it in both my trucks ... 7.3IDI and Cummins 12V

I think it calls for 75/85 but if I get a weight close to that I was wondering if It would be ok?

Syncromesh type fluid ONLY. DO NOT use a regular gear oil.

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Good to know ... and yes Royal purple makes a Syncromesh fluid..... and i have used it in a Neon ... shifts awesome :tu:

Yes it has to be for GL4 or GL5 but what about the difference in weights? Can I just get some close to the same weight and use it?

No, gl4 or gl5 are not safe in these transmission. Syncromesh is a mtl fluid.
And no you can't compare weights and use another oil. This is a white paper on the subject.
http://www.bobistheoilguy.com/forums...1231182&page=1

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Yeah dont subsitute anything else ... you will kill the transmission if you do .... and yeah we know syncromesh is not cheep..... but its a must.... :tu:

Yes gl4 or gl5 will work because that's exactly what it calls for from Chrysler I know because I checked.

No it doesn't. http://img.tapatalk.com/d/13/11/04/qupymy3u.jpg
I can give you the part number in another screenshot. The part number correlates to pennzoil and castoroil syncromesh fluids. You can put in if you want but it wont shift well. No where in any manual will you find a gl4 or gl5 recommended for a nv4500 or nv5600.

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I should also clarify (even though it was covered in the link above) that the syncromesh fluids are gl4 fluids yet all gl4 fluids do not address specific syncronizer needs. A gl4 and a syncromesh mtl are not made equal by the gl4 spec. The article covers the subject more in depth but in basic terms the gl4 is the additive package as it relates to gear wear and other additive packages.

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Land rovers gear oil gl4 works well too, and cheaper than dodge, but not synchromesh

IF you run GL4 or GL5 you will ruin the Syncro's and you take a real good chance of having to replace them all ...

the syncromesh fluid is light and has specially formulated friction modifyers in it to help aid in "traction" with reduced wear on the syncro(s).

the GL4-5 is a much heavier fluid and will take some time to evacuate the space between the syncro's and will hence make shifting much more difficult and will reduce fluid and transmission life as due to most people trying to force it into gear and damaging the sift forks and such ......... SO IN THE LONG END USE THE RIGHT FLUID AND STOP TRYING TO BE CHEEP .... unless u like to replace stuff that you destroy for no aparent reasoen other than the fact that you have more money that common sence .... wich most of us have little money and we "try "to use what common sence the good Lord gave us to begin with ....... end of rant. :tu:

I'd ask around at various chevy and dodge dealerships for their price. I would up getting the correct fluid from a chevy dealership for $18/qt. Some of the dealerships went up to $32/qt. You'll definitely want to use the correct fluid unless you want a new transmission shortly thereafter.

Not true. Fluids equivalent to Chrysler part# MS-9224 or GM part#s 9985648/12346190 are the ONLY approved lubes for use in an NV4500. They are fully formulated SYNCHROMESH 75w/85w GL4 MTL's. They originally referred to Castrol Syntorq LT which was specially developed in partnership with New Venture to allow the Piece 'O Crap NV4500 to last behind the Cummins.

Syntorq LT is long out of production. I found the GM labelled stuff on Amazon a few months ago. Notice the "LT" designator on the Royal Purple stuff listed in MysterNC's link.

It's alot more complicated than you might believe. :w2:

good to know ..... but I know multiple people who have been running the RP for thousands of miles 100k + and nothing butt good things have been reported ...... what r ur thoughts on this ..... is it just enough to keep them from failing or ...?

I'm no oil expert so hoping to have light shed on this subject ..... thanks :pca1::c:

NV4500 gear oil
 

Synchromax "LT" should work. It is at least the same class or category of lube as Syntorq LT was.


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Ams oil makes a direct replacement that works great and is cheaper than dealer just search amsoil for nv4500 on yahoo and itll pop up

Royal Purple actually recommends MaxGear 75w/90 for that trans, which only illustrates how little is actually know about it - even from the so-called experts:

http://royalpurpleconsumer.com/wp-co...ence_Chart.pdf

I'm guessing they no longer produce the "LT" Synchromax either. :nope:

Just had to replace some oil for my nv4500 and the shop got me schaffers oil 239s it crosses to a 30 weight oil and so I called him and he said that it was a power train oil and that if u convert that..?? That in a gear oil it's around a 75/85 weight.. So that's what I'm running, doesn't seem to shift that great but he said that he works on these transmissions for a living and that's what he always uses. Anybody have any toughts on this?:s:

Think I'd throw a syncromesh fluid in it!

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Jesus Harold Christ, I've heard that song and dance before. I have to wonder how many perfectly good pieces of machinery get trashed because of that and the ol' "I know some people who" arguments?

If you value your transmission, listen to MysteryNC. I know some people on here consider the Chrysler publications to be Engines for Dummies books, but they're written by engineers who get paid a whole heap of money to design and maintain this stuff. The good stuff is expensive, but you can pay now or pay later. Your prerogative.

I've got 3 local shops who don't even subscribe to a service like alldata. No torque specs, Wiring diagrams or repair procedures. After doing this a while you realize it is impossible do the job without it! But you ask and they say "ahhh....you don't need that junk!" Those are the guys that you stay away from. Might be good policy before listening to someone on technical advice to ask if they have an information service or service manuals for the job at hand! From time to time one of the local guys around town will dump 5w30 in a 0w30 engine and rumors will circuilate while the owner pays for the rebuild "it's not the oils fault..it's the same thing!"

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Thanks for the replies! I guess I'll bite the bullet now, the recommended stuff is sure a bitch to get ahold of out here in this rural little town. But I'm sure ill manage haha