Oil Capacity Question

[blackdiamond]

I realize that this is simple information, but what is the oil capacity of a single 4.70:1 transfer case and G52 transmission?  Has anyone had any problems running synthetic oil (I'm thinking about Royal Purple, see my review on a different thread) in their transmissions (i.e leaks)?  My transfer case is only a couple of years old from Marlin so I'm positive that it will be OK.  What weight should I run?   

[Weldo]

My Haynes repair manual says, manual trans (fill to overflow) - 4 to 7 pints.
                                          T-case - 3.4 quarts.
Values approximate.

Hmmmm....the book says for the trans, 4 to 7 pts. as in pints, but i wonder if thats a typo, and they meant 4 to 7 qts. as in quarts.  Seems like if the T-case will hold 3 quarts, the trans should hold more than that, not less as the pints would suggest.

Also the book recommends 75W90, I guess that would be like a stock weight.  I dunno if there are advantages to running a heavier or lighter weight, though lighter seems like a bad idea.

[Yota4life]

It says 3.4 for the t-case...But i heard that it was 3 quarts for dual cases. Well thats what i put in. Ill add some more then. Probley 3/4 a quart for the 2nd case. I put 80w90 in mine, becuase it was free, i got a 120pound Barrel of castrol gear oil   Is that fine to run in the tranny and cases?

[reklund5]

80/90's ok, but will sometimes make your shifting sluggish due to the heavy weight.  I usually prefer 75/90 in my trans and tcase.

As far as synthetics go, sometimes they're TOO slippery.  All of your synchros in the trans and tcase are dependent on a little friction to line everything up.  If theres no friction due to super-slippery lubes, the shifting can sometimes be notchy.  I experienced this in my R series tranny in my Supra, inbetween blowing it up...

I've since switched back to plain-old Valvoline 75/90 in my tranny and have had no problems.  It's cheap too, so I just change it every 10K miles in the car (which is an entire year...) and around 10K in the truck, unless I dip it in the water.

Just my 

Ryan

[Yota4life]

I know what you mean, sometimes it does feel sluggish shifting