i am going to replace my clutch and was thinking about rebuiding my tran wail i had it out.
i have a little growl in 5th but it shifts good.

where is a good place to get parts. i dont have much to spend on it.
or sould i just leave it alone?

 

I would leave it alone. And change the fluid with some good stuff. JMO

 

Blackdiesel, what fluid is the good stuff?

 

GL-4 synthetic gear oil.........it has to be rated GL-4.

 

That's a mater of opinion. Some say redline, some say others. you be the judge.

 

I would use the Castrol stuff for it, from Dodge or Chevy dealer...

You can't use off the shelf gear oil in a NV4500.

 

Well said Brian. I already stated what I would do (and did to mine) but this one aint mine

 

Reason I ask is mine is always wet, even after my recent rebuild so I was wondering what to replace/ refill with. It does have the stock Castrol Torque Syn or whatever it is called in there now.

 

I talked with a re-builder who said he recommends using 10w30.

 

^^^^^^^^^was he a rebuilder of transmissions?^^^^^^^^

 

The Castrol and Amsoil are the only oils I know of that are made for the NV4500. Every time I've drained the OEM oil out of a tranny, its been a nice honey coloured. I ran redline in my tranny after I did my dual disc, and other than the synchros getting eaten, the oil is black black black!

 

Penzoil makes a GL-4 rated synthetic gear oil. I have it in my 4500

http://www.pzlqs.com/Tech/Pdsheet/Do...E75W90GL-4.PDF

 

Now to cross reference that GM part#12345371. And see if it comes up fluid for NV4500.

Jed

 

That penzoil stuff is a substitute for GM P/N 12345371. So while that stuff may work, its not designed for the NV4500 like the Castrol and Amsoil oils.

 

How so?

If you read the info page in the link it says it is designed for brass and other soft metal syncronizers.

Can't see that posing a problem.