Fluid change time?

[SolidusJ]

So I was checking out Dennis's "Transfer Case Fluid Change" thread and started to think about when should I change my fluids? I DID have a plan to change all my fluids (t-case, diff, trans, brake fluid, coolant and ect.) at 50,000 miles but not so much now. I just hit 34,XXX and I need to ask when is the right time to change all the fluids? I put on about 1,000 miles every month and off road, enough but not as much as I would like too. So when should I knock everything out? I would like to keep everything all together. :thumbs:

 

[Dennis]

Sup Solid?

I changed all my fluids as you mention above initially at 25,000 miles, except the transmission..I had the dealer do the BG fluid change at 35,000 miles..now it has a warranty for failure as long as I keep changing the tranny fluid every 30,000 miles..So that tells you something about frequency.

If it were me and I had your truck..I would be changing away right now..I used Royal Purple in the Diffs, Delco supreme II in the brakes, Dex-Cool premixed 50/50 coolant.(note on coolant..when mixing with water, ALWAYS use DISTILLED water..no minerals means, no deposits or scaling in your engine's water jacket.) Don't forget to suck out the P/S reservoir and refill a couple of times too over a period of a few days to get a good flush..Delco #10-5030 Power steering fluid..All this effort is cheap insurance for long trouble free mechanical life.
So bottom line..I change all my fluids every 30,000 miles now, except the engine oil, and that's at every 5000 miles..

This is just my method of madness..so it's not gospel..I feel that after owning and maintaining cars for over 40 years..I've learned to be a little anal and it pays off with lasting mechanical performance with no major issues.

 

[Dennis]

EDIT:..The Coolant I change every two years along with the Brake fluid..

 

[alrock]

My truck has been on a 50,000 mile schedule for diffs, transfer case, transmission. I do not have a schedule for power steering, brake fluid or coolant. I use the oil life monitor to some degree and change it when it is around 40% or below, which is usually around 7,000 miles.

Basically I'm following GM's severe service recommendations for the first three items since my truck's use easily fits that definition (hot desert use; offroading). I "changed" the PS fluid with a replacement pump. I've bled the brakes so many times the fluid has effectively been changed. Coolant? Well, that was addressed by a cracked radiator.

'07 owners manual:
Coolant: 150,000 miles
Transfer case: 100,000 miles; 50,000 severe
ATF: 100,000 miles; 50,000 severe
Spark plugs: 100,000 miles
Diffs: not covered by the owner's manual
Power steering fluid: not covered by the owner's manual
Brake fluid: not covered by the owner's manual

(I may be incorrect with the last three but I could not find them)