G80 Question

[hydman]

I know this has been asked before but I'm not finding it. I just bought a 2010 3500HD and I'm not sure if there is a break in period after which I need to change the fluid in the front and rear dif. I remeber having to change it in my 2003 at 500 miles.

[Nytemare]

I know this has been asked before but I'm not finding it. I just bought a 2010 3500HD and I'm not sure if there is a break in period after which I need to change the fluid in the front and rear dif. I remeber having to change it in my 2003 at 500 miles.

People suggest changing it early, I never have...Mine has 65K on it now...still looks good.

 

Just follow the service schedule in your manual.

[hydman]

Thanks, Since I'm planning on towing pretty heavy I was a little concerned.

[Zembonez]

I don't believe there is an initial fluid change needed but if you tow, I'd change it sooner than the maintenance schedule recommends.

[hydman]

I'm towing a fifth wheel aroung 12K and with the old rig I changed rear dif fluid around 35000 miles. Still looked and smelled ok.

[Zembonez]

I'm towing a fifth wheel aroung 12K and with the old rig I changed rear dif fluid around 35000 miles. Still looked and smelled ok.

I think changing at 30-35K is a good interval if you use one somewhat hard. Good cheap insurance for long life!

[Nytemare]

yup agreed...I think 50K is the recommended interval, but like Jim said, early change is cheap insurance.

[thearborbarber]

The heavy duties used to have an initial gear oil change after 500 towing miles. Then every 50000 miles. I would check the owners manual.

[700 sportsman]

IMO 30 or 40k is probably about right, and the G80 is mainly mechanical, so it shouldn't have much clutch wear in material

[hydman]

I'll probably change after the first 500 miles towing. Agree completely about tne cheap insurance. I've just towed a few miles so far to test everything when setting up. First impression was a very noticable difference in power and that ITBC system works like a charm, No where close to the milage I was getting with the 03 though. I'm sure it will get better, but then again, I didn't buy it for the milage.

 

Thanks for the replies,

Walt