I was just curious how often everyone is changing it and what they are replacing the fluid with? thanks in advance/.

 

Mobil 1 75 w90 synthetic GL5 gear oil every 20k miles.

..

 

I've changed mine twice in 200,000+ miles. didn't really need it the last time, but i replaced the clutches so as a point of procedure i changed it .....i used redline

 

Amsoil Severe gear 75-90 and a Mag-Hytec@9,000 miles. Oil was black as my engine oil at change time.

 

I'd do 15k while under warranty, and maybe 30k after that.

I run Redline 75-140 rear and 75-90 front.

As long as it is full synthetic and rated at GL-5...

 

Mobil 1 75-90
Once at 58,000 and again at 198,000. all is well..

 

Amsoil Severe Gear 75w-90 in the axles, and like said above, while in the warantee I changed according to the maint schedule. Now that I'm out of the drivetrain warantee, I have extended the changes to 30K as well.
I did use Royal Purple 75W-90 one time as well, and it was great as well. At 75K my gears still have machining marks and literally look new. So, the Amsoil and RP are good in my eyes!

 

I've had RP 75w-90 in the diffs for the last 7.5k and I'm happy with it. I have the same in the gear box of the finish mower on my tractor and it's been good in there too. Next time I change it, which will probably be around 30k or so, I'm going to replace it with Amsoil Severe Gear and go for extended intervals, right now it's every 15k.

 

75w-140. Planning on changing every 50k miles.

MikeyB

 

Just changed mine @ 16k
Went w/ 75w-140 because I was able to find 4 qts 'mis-priced' at a local Advance Auto for $8.xx/qt. Normally it's like $15/qt
Think next time I'll go back to 75w-90

 

Can't go wrong with the Amsoil.

 

I use vaivoline synthetic 75w-90 change every 25000 miles looks like new when I change it. They told me that it did not need to be change that it would go at less 50000 miles. I change oil at 6000 miles.changed it yesterday also changed all filters all oils transmission/ rear ends /transfer case /all filters. I am getting ready for the road.I am a snowbird

 

75W-90 SVO (Sever Gear Oil) Chagned factory at 60k and it looked really good still, plan on changing this in 60k again.

 

Just did mine for the first time at 50k km (31k milkes), 75-90 Royal Purple

 

We run SynerGyn in all of our diffs... can't buy anything better (lot of race teams use it).