Oil & Fuel John Deere 4300 HST Oil in transmission and gearboxes question

[pat32rf]

My 4300HST (with 5500hours)fluid has been replaced twice in the past two months. The first time when I did my scheduled change and the second time when I hung up on a stump and broke the return fitting under the differential.... Normally it would get changed once a year, the engine oil twice.(spring and fall)
I never flush the system as the filters catch the crud. You would have to add 5 gallons of fluid, run the system, then dump it out to flush it effectively....at least in my thinking

 

[beenthere]

Welcome to TBN
You are correct on the front axle...it is GL5
..................

I stand corrected, it is NOT GL5.. it is supposed to be HY-GARD or J20C or J20D. according to the 4300 manual.

 

[pmsmechanic]

I just changed all oils on my 4410. The transmission and the front end all get Lo-Viscosity Hy-Guard. Also check with your dealer but my service manager told me that if you use an John Deere synthetic oil with John Deere filters in the engine you can increase oil change intervals by another 50%. That alone pays for the difference in price for a synthetic oil.