Guys I was changing the front axle oil and I was going to put in Royal Purple 75W90, I have like 6QTs of it and I was looking in the book and it says 80W90
Would it be ok to use the 75W90?
O ya my truck is 2005 Super Duty 4x4 4:10 rear.
Thanks ~Gage~
__________________
2005 Ford SuperDuty XLT SuperCab V10 4x4 FX4 Shortbed
2000 Ford Expedition XLT Sport 4x4 5.4L
Interesting, my front axle (Dana 50) says to use 75W90 ... I used Mobil 1 in it when I changed it 2 years ago...
__________________
- art k. - Moderator for the Superduty, V10, and FE forums
'01 F250SD SC SB XLT V10 4x4 auto 3.73 Volant CAI, eBay headers and y-pipe
'97 Cougar XR7 30th Anniv Edition 4.6L
'74 F250 Highboy FE390 deceased! I've been wrong before, I'll be wrong again. Just wait and see.
Mine says 75w90. But i went with 75w140. The guy recommended it if u tow alot.
I sterling 10.5 takes 75-140. I don't see how towing really has much of an effect on the front axles because when the hubs are unlocked the front axle is along for the ride. Loading up the rear of the truck doesn't really put much more weight on the front.
Trivia question: Didn't the pre-Superduty Sterling axles take a non-synthetic 75w90? Or there was a break-off point where they went to 75w140 synthetic?
And remember, if you have an aftermarket locking (limited-slip) differential, always check what the manufacturer says to use.
__________________
- art k. - Moderator for the Superduty, V10, and FE forums
'01 F250SD SC SB XLT V10 4x4 auto 3.73 Volant CAI, eBay headers and y-pipe
'97 Cougar XR7 30th Anniv Edition 4.6L
'74 F250 Highboy FE390 deceased! I've been wrong before, I'll be wrong again. Just wait and see.
I sterling 10.5 takes 75-140. I don't see how towing really has much of an effect on the front axles because when the hubs are unlocked the front axle is along for the ride. Loading up the rear of the truck doesn't really put much more weight on the front.
opps my bad. I thought the OP wanted a fluid for his front and rear axle. Then i re read and saw front only lol my bad.
Trivia question: Didn't the pre-Superduty Sterling axles take a non-synthetic 75w90? Or there was a break-off point where they went to 75w140 synthetic?
I don't know, but 75W-140 worries the heck out of me. The Mustang 8.8 rear axle began calling for it somewhere around 1999- 2001, after using standard 75W90 and 80W90 for over 15 years. I have never heard of so many 8.8 bearing failures until they started filling them with the new stuff. There is no reason to find wet rust in a rear axle. I can abolutely see why it is not recommened in the front axle.
__________________
2004 F350 XL CC 4X4 V10 4.30LS purchased from Jeff Clark at Van Bortel Ford Pics
Trivia question: Didn't the pre-Superduty Sterling axles take a non-synthetic 75w90? Or there was a break-off point where they went to 75w140 synthetic?
And remember, if you have an aftermarket locking (limited-slip) differential, always check what the manufacturer says to use.
It seems synthetic is preferred by gearbox manufactuers. I deal with industrial reduction gearboxes and the manufactuers say only to use synthetic oil and they even pre-fill them with synthetic from the factory. Now ford is going with all synthetic trans fluid. It seems they like their synthetic oil, at least in recent years. In gearboxes synthetic is supposed to be the cats nuts as for engine oil I don't think it matters so much.
Join Our Site - Its free, quick and easy!
Help 75W90 or 80W90 Front axle Fluid?
