Change Driveline Fluids Early!

[23OBX2.7]

Worth a try. Is ot ALU alloy or steel? Can always have it powder coated.

In my experience FP is a joy to deal with and go beyond.

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[redone17]

@Bobio - damn! That’s bad. I just got mine back from Powdercoat. Glad I did that in advance.

Did you use the factory gasket or the one that came with the cover? I wonder if @CarbonSteel was right all along…minimal thread engagement cause this or poor torque?

—

 

[CarbonSteel]

Thanks, and I scanned over the warranty and they probably won't cover it, but like I told
23OBX2.7, I'll try.
After looking up close, it looks like it's also missing a couple of bolts..lol
Does anyone remember off-hand what size those are?

https://www.bronco6g.com/forum/thre...ers-fluids-oil-changes-etc.86135/post-2662013

 

[Bobio]

@Bobio - damn! That’s bad. I just got mine back from Powdercoat. Glad I did that in advance.

Did you use the factory gasket or the one that came with the cover? I wonder if @CarbonSteel was right all along…minimal thread engagement cause this or poor torque?

—

I used the original, and torqued to spec. If I remember correctly correctly. Lol
Where did you get yours Powder coated?

 

[Bobio]

https://www.bronco6g.com/forum/thre...ers-fluids-oil-changes-etc.86135/post-2662013

Thanks

 

[Bobio]

Looks like Ford Performance is awesome!

 

[ThunderFlash]

Looks like Ford Performance is awesome!

They seem to do well on warranty. I bought the tailgate reinforcement which was cracked, and they sent me a new one with no questions asked.

 

[505Bronco]

Just finished doing the front and rear diffs and T case on my 24 BD 2.7 SAS. Currently sitting at 7k miles and this is my first dump. Surprised at how dark the rear diff oil was. The front wasnt too bad with some tan still in it. The Tcase was a little dark too but I guess is to be expected. I put Motorcraft 75w140 in the axles and Mercon LV in the T case. I'll do it again at 15k then at 25k.

 

[jacknifetoaswan]

I'm in the middle of analysis paralysis regarding what fluids to use for the front and rear diffs. Admittedly, I went way too long before I changed the diff fluids and am currently at 53k miles. For reference, my Mustang GT has had two diff fluid changes after the factory fill and I'm at just over 63k miles on that.

I live in South Carolina. It's hot. I don't do a ton of off roading with the Bronco, and when I do, it's mostly flat trails and/or mud rather than any rock crawling (we just don't...have any rocks...or elevation).

I have been leaning towards 75W-90 in the front diff and 75w-140 in the rear diff, but would prefer to buy a gallon of the fluid and leave a quart or so in the container for the next drain and fill (which will not be in 53k miles). With that, and my temp issues in SC, would going for the 90 weight or the 140 weight oil be preferable?

I'm also confused between the Ford specs (WSS-M2C197-A/WSS-M2C942-A) and the specs listed on the gear oils, e.g., GL-5. Can I choose any GL-5 synthetic and make the safe assumption that it will meet those? My googling seems to indicate that the WSS-M2C179-A is specifically a GL-5 80W-90 gear oil, while WSS-M2C942-A is a GL-5 75W-85.

Anyway, I'm confused. Please make my decision for me.

JR

 

[Brian_B]

I'm in the middle of analysis paralysis regarding what fluids to use for the front and rear diffs. Admittedly, I went way too long before I changed the diff fluids and am currently at 53k miles. For reference, my Mustang GT has had two diff fluid changes after the factory fill and I'm at just over 63k miles on that.

I live in South Carolina. It's hot. I don't do a ton of off roading with the Bronco, and when I do, it's mostly flat trails and/or mud rather than any rock crawling (we just don't...have any rocks...or elevation).

I have been leaning towards 75W-90 in the front diff and 75w-140 in the rear diff, but would prefer to buy a gallon of the fluid and leave a quart or so in the container for the next drain and fill (which will not be in 53k miles). With that, and my temp issues in SC, would going for the 90 weight or the 140 weight oil be preferable?

I'm also confused between the Ford specs (WSS-M2C197-A/WSS-M2C942-A) and the specs listed on the gear oils, e.g., GL-5. Can I choose any GL-5 synthetic and make the safe assumption that it will meet those? My googling seems to indicate that the WSS-M2C179-A is specifically a GL-5 80W-90 gear oil, while WSS-M2C942-A is a GL-5 75W-85.

Anyway, I'm confused. Please make my decision for me.

JR

Really either will be fine, but if you want to run one fluid in both I do 75W140, and it has held up well in the near-desert Valley heat here in CA.

I’ve run expensive Amsoil, and cheap Napa/Oreilies synthetic, and honestly could not tell the difference apart from one cost twice as much. Everything seems to come out pretty clean after that first factory drain; that one is always gnarly.

 

[CarbonSteel]

I'm in the middle of analysis paralysis regarding what fluids to use for the front and rear diffs. Admittedly, I went way too long before I changed the diff fluids and am currently at 53k miles. For reference, my Mustang GT has had two diff fluid changes after the factory fill and I'm at just over 63k miles on that.

I live in South Carolina. It's hot. I don't do a ton of off roading with the Bronco, and when I do, it's mostly flat trails and/or mud rather than any rock crawling (we just don't...have any rocks...or elevation).

I have been leaning towards 75W-90 in the front diff and 75w-140 in the rear diff, but would prefer to buy a gallon of the fluid and leave a quart or so in the container for the next drain and fill (which will not be in 53k miles). With that, and my temp issues in SC, would going for the 90 weight or the 140 weight oil be preferable?

I'm also confused between the Ford specs (WSS-M2C197-A/WSS-M2C942-A) and the specs listed on the gear oils, e.g., GL-5. Can I choose any GL-5 synthetic and make the safe assumption that it will meet those? My googling seems to indicate that the WSS-M2C179-A is specifically a GL-5 80W-90 gear oil, while WSS-M2C942-A is a GL-5 75W-85.

Anyway, I'm confused. Please make my decision for me.

JR

Run 75W-140 in both. Dana Spicer recommends it in both axles. Ford (and nearly all OEMs running Dana axles) reduce the viscosity in the quest to comply with CAFE credits aka maximum MPG which is not conducive to longevity.

Any GL-5 fluid will work as it is better to change it more often versus performing extended fluid changes.

Hope this helps!

 

[jacknifetoaswan]

Run 75W-140 in both. Dana Spicer recommends it in both axles. Ford (and nearly all OEMs running Dana axles) reduce the viscosity in the quest to comply with CAFE credits aka maximum MPG which is not conducive to longevity.

Any GL-5 fluid will work as it is better to change it more often versus performing extended fluid changes.

Hope this helps!

Thanks, it did. For my Mustang, I just run the BG fluids that Optimum Performance sells on their website. Expensive, but really good, and I don't need to think about what I'm putting in.

I just swapped the fluids in the diffs and transfer case. All looked surprisingly good for 53k miles, and smelled WAY better than the gear oil I pulled out of my girlfriend's Tahoe a couple weeks ago at 96k miles. That looked awful. I ended up using Valvoline Synpower 75W-140 in both diffs and Motorcraft Mercon LV in the transfer case. I'll do all of them again in 10k miles since I went so long on the factory fluid.

Overall, it's not difficult to do, just a pain pumping that much fluid into the diffs. I didn't even put the truck on stands, just slid underneath on the ground.

JR

 

[CarbonSteel]

Thanks, it did. For my Mustang, I just run the BG fluids that Optimum Performance sells on their website. Expensive, but really good, and I don't need to think about what I'm putting in.

I just swapped the fluids in the diffs and transfer case. All looked surprisingly good for 53k miles, and smelled WAY better than the gear oil I pulled out of my girlfriend's Tahoe a couple weeks ago at 96k miles. That looked awful. I ended up using Valvoline Synpower 75W-140 in both diffs and Motorcraft Mercon LV in the transfer case. I'll do all of them again in 10k miles since I went so long on the factory fluid.

Overall, it's not difficult to do, just a pain pumping that much fluid into the diffs. I didn't even put the truck on stands, just slid underneath on the ground.

JR

SynPower should be available in "flex bags" so you should not have to pump into the axle, just squeeze the bags. One of these is a lifesaver:

https://www.autozone.com/p/flotool-multi-purpose-spout-10106b12/2366

 

[jacknifetoaswan]

SynPower should be available in "flex bags" so you should not have to pump into the axle, just squeeze the bags. One of these is a lifesaver:

https://www.autozone.com/p/flotool-multi-purpose-spout-10106b12/2366

It was going to be $60 for three quarts of the flex bags or $65 for a gallon in a jug, so I bought the gallon. Not sure I'd do that again. I had read the flex bags are a pain to deal with, as well.

JR

 

[CarbonSteel]

It was going to be $60 for three quarts of the flex bags or $65 for a gallon in a jug, so I bought the gallon. Not sure I'd do that again. I had read the flex bags are a pain to deal with, as well.

JR

With the nozzle I posted it's a piece of cake--even the plastic bottles are easy with the nozzle.

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