ajoebob

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?

blackdiesel

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

Big Blue24

Blackdiesel, what fluid is the good stuff?

1-5-3-6-2-4

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

blackdiesel

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

displacedtexan

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.

displacedtexan

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

Big Blue24

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.

Mike D

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

300sd2500

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

Tate

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!

1-5-3-6-2-4

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

linetrash75

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

Jed

Tate

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.

1-5-3-6-2-4

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.