When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
What weight differential gear lube should I use in my '94 Bronco,8.8, 3:55 limited slip. I've got Valvoline 80-90 wgt with the Ford additive in there right now. When year did Ford start using the synthetic 75-140 wgt. in the differential? There seems to be some differing opinions on what weight to use.
Dana and Ford rear axles use Premium Rear Axle Lubricant XY-80W90-QL or -KL or equivalent meeting Ford specification WSP-M2C197-A.
It is recommended that the lube be replaced in all rear axles at 100,000 mile intervals, or if the rear axle has been submerged in water, or more often under certain extreme conditions. High Performance Synthetic 7W-140 Rear Axle Lubricant F1TZ-19580-B or equivalent meeting Ford specification WSL-M2C192-A is available for repairs and refills in situations that fall into the severe or extreme use categories.
Of course, that "7W..." is a typo, but it's exactly what's on this CD. In another part, it shows:
Service Fill for Severe Use, Dana, F-Super Duty Rear Axles-----75W-140 Synthetic Rear Axle Lube ------ P/N: F1TZ-19580-B ----- Ford Spec: WSL-M2C192-A
Appreciate the opinion and information. It is most helpful. I have 108,000 miles on the odometer. Bronco is basically used on the interstate between Fla. and Ga. Great road vehicle. Plan to keep for a long time, thus the reason for wanting to make certain that it is getting the right care.
Does this fluid work for my 13 F150, FX4, Electronic locking diff
Hello all,
Time to replace the rear differential fluid looking at Triax Synergy Gear Max, 75W-140, synthetic. It's supposed to contain a friction modifier in it but will it harm an ELD ?
What is so special with that oil that you would want to be the first to use this? Curious. There are so many other oils that people have used and have had good results.
If it had 80w90 with friction modifier, then that's what I'd put back in it. As for synthetics, I don't believe you are gaining anything with that, and some aftermarket LSD manufacturers don't recommend it with their clutch type lockers. There may be a difference going from 80w90 to 75w140 for vehicles in warmer areas, but IMO, that would even be for extreme duty.
I use conventional, middle of the road 80w90, with 1 bottle of Ford friction modifier in my Lightning 8.8 with an Eaton LSD. I have beat the crap out of it over many years and no issues due to the gear oil...just my .02.
I like synthetic oils and I am too old to be a guinea pig to experiment on cheap products. I also like thick oils. I get that thinner are where it's at and better for MPG, but when I barely get 5mpg when I tow my 5th wheel, I'm not going to seem much improvement.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
