85w140 in Ford 8.8

[crashz]

I had a 1997 and a 2001 Jellybean F150. Regular cab/shortbed 4x4s. They were the perfect size and fun to drive. Crap V6 engines though. If the 2001 had the 4.6L V8, I'd probably be still driving with a million miles on it.

 

[bdcardinal]

The 7 lug trucks are the bane of my existence purely because the owners for whatever reason refuse to tell me. Then when I ask for the VIN they act like i am asking for their social security number.

Also the 3/4 float 9.75s are fantastic for parts people. There is a recall to replace the axles that break and they are not cheap at all, so I do well on the commission side of things.

 

[Sumboodie]

Ford specs 140wt for alot of stuff that 80w90 is spec'd in near everything else.

It's spendy stuff. I just quoted a few drums at around $3k each. 75w90 synthetic is about $2k a drum... and that's figuring in shipping costs, so L48 prices probably $500 less.

 

[userfriendly]

Ford specs 140wt for alot of stuff that 80w90 is spec'd in near everything else.

It's spendy stuff. I just quoted a few drums at around $3k each. 75w90 synthetic is about $2k a drum... and that's figuring in shipping costs, so L48 prices probably $500 less.

Synthetic 80W140 should be about the same price as 75W90. Last week I paid $280 Canadian including tax which equates to $196 USD for a 20L pail.
I’ve been using 80w140 instead of 75W90 in GM 1500s and HDs for years, and now in a F350 that calls for 75W140.

 

[wtd]

It was a strange time in driveline fitting. In 97-99 Ford sold a "Lite Duty" F250 which was badged as a 250 but looked like the 10th gen 150s, they all had 7 lug wheels. Ford did not have the Super Duty F250s ready until later in 99, when the SD250s came out they discontinued the LD250s that looked like 150s. During the same period of time, Ford sold 150s with basically the same running gear as the LD250s but with 5 lug wheels.

I remember these lite duty 250's since I was in the market for a new truck in 1998. I ended up with my 98 Chevy K1500 which I still own. I really liked the Fords, but they were having the spitting out spark plug issue during that time, and they were more expensive to buy.

 

[Fordiesel69]

The 8.8 axles can use just about any weight gear oil you want. Synthetic or conventional.

I have owned so many of these I lost count. If you have an 8.8 that was not properly set up at the factory, or if you get one has not had the axles hardened properly, they will fail regardless of axle fluid used. Conversly, I have seen many police crown vics that have had 200k+ miles on their factory fluid.

75W-140 is what I would use if you tow or operate in high heat.
75W-90 is what I would use if you do not tow or two very sparingly, and want a touch of fuel milage gains for short trips.
75W-110 is just about perfect and an excellent fluid.

50K is my favorite interval for these.