hi i have a 2002 F350 4x4 and would like to know what oil goes in the front axle. thanks

 

Should be 80w-90.

 

ok just wanted to make sure it wasnt synthetic . i know the rear says synthetic on the one axle tag but wasnt sure about the front. thanks

 

80w90 is good enough for the rear end too. i believe the only reason ford started the 75w140 thing a few years ago was to get slightly better gas mileage out of it so they could put a better epa mileage rating on the truck when it was new on the lot.

this is also the reason for 5w20 motor oil recomendations in the gas engines which actually causes engine wear but better gas mileage.

 

So what engine oil should us 5.4 owners be running?

 

i use royal purple 10-30 in my 5.4.
as far as front axle, book says 75-90, rear is 75-140. i use royal purple ith those as well.
I don't know why they changed to 75-140 but it sure wasn't to get better MPG. going to a thicker oil will not give you better MPG.

 

From the owner's manual.

Your engine should have Motorcraft SAE 5W-20 Premium
Synthetic Blend Motor Oil

Your front axle should have a Hypoid Gear Oil SAE 90.

Your rear axle should have Motorcraft SAE 75W-140 Synthetic Rear Axle Lubricant

Here's a URL to the manual. Lube recommendation chart is page 234.

http://www.analogstereo.com/pdf/om/f...anual_2002.pdf

 

<TABLE style="WIDTH: 631pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width=840 border=0 x:str><COLGROUP><COL style="WIDTH: 91pt; mso-width-source: userset; mso-width-alt: 4425" width=121><COL style="WIDTH: 80pt; mso-width-source: userset; mso-width-alt: 3913" width=107><COL style="WIDTH: 64pt; mso-width-source: userset; mso-width-alt: 3108" width=85><COL style="WIDTH: 72pt; mso-width-source: userset; mso-width-alt: 3510" width=96><COL style="WIDTH: 92pt; mso-width-source: userset; mso-width-alt: 4461" width=122><COL style="WIDTH: 78pt; mso-width-source: userset; mso-width-alt: 3803" width=104><COL style="WIDTH: 154pt; mso-width-source: userset; mso-width-alt: 7497" width=205><TBODY><TR style="HEIGHT: 12.75pt" height=17><TD class=xl24 style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 91pt; BORDER-BOTTOM: #ece9d8; HEIGHT: 12.75pt; BACKGROUND-COLOR: transparent" width=121 height=17>Front Diff</TD><TD class=xl24 style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 80pt; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent" width=107>Gear oil</TD><TD class=xl24 style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 64pt; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent" width=85></TD><TD class=xl24 style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 72pt; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent" width=96>Ford Spec</TD><TD class=xl24 style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 92pt; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent" width=122>XY-75W90-TQL</TD><TD class=xl24 style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 78pt; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent" width=104>WSP-M2C201-A</TD><TD class=xl24 style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 154pt; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent" width=205>75W90 HP Axle Lube</TD></TR></TBODY></TABLE>

 

I see that for the later years (like 2006) but the 2002 manual calls for the Hypoid Gear Oil SAE 90.

 

Uh, no, there were lots of Sterling failures early on, when they went to synthetic, it stopped.

 

Rear Diff Gear oil 8 Pint F1TZ-19580-B WSL-M2C192-A 75W140 HP Synthetic Axle Lube
Lubermatic OEM Synthetic 70w 140 States on label meeting spec.



Rear Diff Limit Slip additive 35 ft lbs 1/2 Pint 16 oz C8AZ-19B546-A
EST-M2C118-A
TransX Limit Slip Tube states on label meets spec

 

my 99 manual says 75-90 for the front, weird.

 

I'd go with the 75-90 also, I just wonder why they didn't call for it in the 2002 manual?

 

i bought my 2000 f250 sd with a 5.4 from a ford dealer with 60,000 miles about 9 months ago and it had 5w20 in it at the time. on cold starts the lifters would make alot of noise for a minute and when it would warm up at idle there was a slight knock from the engine. not sure if it was piston slap or what. at the first oil change i put in quaker state 10w30 and the engine hasn't made a sound since i started using that. i've changed the oil 4 or 5 times since then.

i had an f150 with a 4.6 before this truck and used nothing but 10w30 qs for it's whole life and never had a problem with engine knocks or ticks and i sold the truck with close to 200,000 miles on it.

 

Smart move going to 10w30.