Grit dog
Black Diamond, WA
Senior Member
Joined: 05/06/2013
View Profile
 Offline
|
ilvtravln wrote:Grit dog wrote:How often? Now. If it’s 20 year old oil. That said once I do an early diff change on a new or new to me vehicle, I go at least 50k between changes with good synthetic gear lube.
PS, if it’s an early 03 7.3 you have a very desirable vehicle if it’s been kept up and basically used only rarely.
Its a 7.3, well kept.
Worth mentioning in the event you’re unaware, depending on the model and options, you likely have a very valuable truck, especially being the newest/last 7.3s made.
Point is it’s worth it to take care of that truck, moreso than most. And they needa little extra care in the fluids department. 7.3 HPOPs are very happy with fresh oil and not happy with extended OCIs.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold
|
JIMNLIN
Oklahoma
Senior Member
Joined: 09/14/2003
View Profile
|
ilvtravln wrote:Have an 03 F350, 90K miles, how often should the diff. oil be changed ? Ford lists the oil that came with is as synthetic. We do about 1/3 towing and the rest around town. Thanks
My 2wd '03 2500 Dodge/Cummins has 377k+ miles now on the 11.5" AAM rear axle.
I bought the truck new and after draining OEM rear axle fluid has nothing but 75w-140 Redline synthetic changed every 50k-60k miles or so.
Depending on truck use the life of the rear axle assy depends on dumping old contaminated fluids and going with fresh fluids.
Makes a difference.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
'97 Park Avanue 28' 5er 11200 two slides
|
Huntindog
Phoenix AZ
Senior Member
Joined: 04/08/2002
View Profile
|
i used to be anal on this. at every scheduled change the fluid smelled burnt. that changed with my 2001 duramax. it was my first one using synthetic. that used fluid came out smelling and looking the same as the new i was replacing it with'
Huntindog
100% boondocking
2021 Grand Design Momentum 398M
2 bathrooms, no waiting
104 gal grey, 104 black,158 fresh
FullBodyPaint, 3,8Kaxles, DiscBrakes
17.5LRH commercial tires
1860watts solar,800 AH Battleborn batterys
2020 Silverado HighCountry CC DA 4X4 DRW
|
|
|
|
