Ford syn 75w-140 differential fluid
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Valvoline synthetic, Royal Purple synthetic, Red Line synthetic to name a few, all very good replacements.
Not sure about their gear oil but Motorcraft engine oil is a ConocoPhillips product.
There are a number of other synthetic 75W-140 oils readily available. Lucas, Valvoline, and Mobil 1 should be easy to find. Red Line and Amsoil are supposed to be very good products but aren't as easy to find.
$15 a quart for 75W-140 is a typical price, and don't forget the 4 ounces of friction modifier for Traction-Lok.
There are a number of other synthetic 75W-140 oils readily available. Lucas, Valvoline, and Mobil 1 should be easy to find. Red Line and Amsoil are supposed to be very good products but aren't as easy to find.
$15 a quart for 75W-140 is a typical price, and don't forget the 4 ounces of friction modifier for Traction-Lok.
Red Line gear oils are top notch. If you're looking for a high quality synthetic, I wouldn't use anything else.
Originally Posted By: AP9
and don't forget the 4 ounces of friction modifier for Traction-Lok.
Only if you have a limited-slip diff. Get the stuff from the dealer for like $4 a bottle. RedLine additive works well too I here.
No reason to put any additive in the non-limited slip.
and don't forget the 4 ounces of friction modifier for Traction-Lok.
Only if you have a limited-slip diff. Get the stuff from the dealer for like $4 a bottle. RedLine additive works well too I here.
No reason to put any additive in the non-limited slip.
LUCAS, Really? OMG.........
Originally Posted By: AP9
Not sure about their gear oil but Motorcraft engine oil is a ConocoPhillips product.
There are a number of other synthetic 75W-140 oils readily available. Lucas, Valvoline, and Mobil 1 should be easy to find. Red Line and Amsoil are supposed to be very good products but aren't as easy to find.
$15 a quart for 75W-140 is a typical price, and don't forget the 4 ounces of friction modifier for Traction-Lok.
Originally Posted By: AP9
Not sure about their gear oil but Motorcraft engine oil is a ConocoPhillips product.
There are a number of other synthetic 75W-140 oils readily available. Lucas, Valvoline, and Mobil 1 should be easy to find. Red Line and Amsoil are supposed to be very good products but aren't as easy to find.
$15 a quart for 75W-140 is a typical price, and don't forget the 4 ounces of friction modifier for Traction-Lok.
I know Ford specs a 75w140, but I really like Delo 85w140, and that is what I chose for my F350. It's been in 2 years now, and even in the 5 degree weather we had last week, the rear was smooth. I added 4 ounces of Redline Limited Slip Additive when I put it in. I have no complaints. https://cglapps.chevron.com/msdspds/PDSDetailPage.aspx?docDataId=76979&docFormat=PDF
I've also run the Valvoline Syn Power in my old F250. No problems there either.
I've also run the Valvoline Syn Power in my old F250. No problems there either.
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Originally Posted By: BobsArmory
LUCAS, Really? OMG.........
Yep, it exists. Actually running it now, but don't worry it won't stay in there much longer.
Originally Posted By: mount
Only if you have a limited-slip diff. Get the stuff from the dealer for like $4 a bottle. RedLine additive works well too I here.
No reason to put any additive in the non-limited slip.
True. Traction-Lok = limited slip. Could be different with the Expedition, but with Ranger & Explorer, Ford always called for 80W-90 for open diff and 75W-140 for LSD.
LUCAS, Really? OMG.........
Yep, it exists. Actually running it now, but don't worry it won't stay in there much longer.
Originally Posted By: mount
Only if you have a limited-slip diff. Get the stuff from the dealer for like $4 a bottle. RedLine additive works well too I here.
No reason to put any additive in the non-limited slip.
True. Traction-Lok = limited slip. Could be different with the Expedition, but with Ranger & Explorer, Ford always called for 80W-90 for open diff and 75W-140 for LSD.
Originally Posted By: mount
Originally Posted By: AP9
and don't forget the 4 ounces of friction modifier for Traction-Lok.
Only if you have a limited-slip diff. Get the stuff from the dealer for like $4 a bottle. RedLine additive works well too I here.
No reason to put any additive in the non-limited slip.
And only if you're using a gear oil that doesn't already contain it. I have Valvoline 75W-140 in my F-350 and my LS works flawlessly without any added friction modifier. I believe Mobil 1 already contains it too.
Originally Posted By: AP9
and don't forget the 4 ounces of friction modifier for Traction-Lok.
Only if you have a limited-slip diff. Get the stuff from the dealer for like $4 a bottle. RedLine additive works well too I here.
No reason to put any additive in the non-limited slip.
And only if you're using a gear oil that doesn't already contain it. I have Valvoline 75W-140 in my F-350 and my LS works flawlessly without any added friction modifier. I believe Mobil 1 already contains it too.
My Nissan, I had Mobil SHC ID in it for ages, then they discontinued.
Got RP 75W-140, and mine's an LSD, the RP has just enough modifier in it that it doesn't clunk, but is nice and tight and pushes the front wheels on polished concrete some...I'm happy.
Got RP 75W-140, and mine's an LSD, the RP has just enough modifier in it that it doesn't clunk, but is nice and tight and pushes the front wheels on polished concrete some...I'm happy.
I used Red Line in the past and lost a differential afterwards.
I have used Royal Purple and WM ST without any problems.
IMO, I think if a differential calls for a friction modifier DO NOT rely solely on what a differential fluid brand states about having the friction modifier in their fluid. Buy the required amount of friction modifier and add it to the differential.
I think this is why I lost my differential after using Red Line fluid.
I have used Royal Purple and WM ST without any problems.
IMO, I think if a differential calls for a friction modifier DO NOT rely solely on what a differential fluid brand states about having the friction modifier in their fluid. Buy the required amount of friction modifier and add it to the differential.
I think this is why I lost my differential after using Red Line fluid.
Originally Posted By: BlueOvalFitter
I used Red Line in the past and lost a differential afterwards.
I have used Royal Purple and WM ST without any problems.
IMO, I think if a differential calls for a friction modifier DO NOT rely solely on what a differential fluid brand states about having the friction modifier in their fluid. Buy the required amount of friction modifier and add it to the differential.
I think this is why I lost my differential after using Red Line fluid.
Some RL fluids have the additive, some don't. Which one did you use??
I used Red Line in the past and lost a differential afterwards.
I have used Royal Purple and WM ST without any problems.
IMO, I think if a differential calls for a friction modifier DO NOT rely solely on what a differential fluid brand states about having the friction modifier in their fluid. Buy the required amount of friction modifier and add it to the differential.
I think this is why I lost my differential after using Red Line fluid.
Some RL fluids have the additive, some don't. Which one did you use??
Is this the Motorcraft stuff in the red quart bottles shaped like an engine oil bottle (and not an upright cylindrical bottle like most gear oils), which says "FULL SYNTHETIC" right on the label??
I've heard it is REALLY good gear oil, and would like to try it (or the Chevron Delo ESI) next.
I've heard it is REALLY good gear oil, and would like to try it (or the Chevron Delo ESI) next.
Originally Posted By: sprintman
Originally Posted By: BlueOvalFitter
I used Red Line in the past and lost a differential afterwards.
I have used Royal Purple and WM ST without any problems.
IMO, I think if a differential calls for a friction modifier DO NOT rely solely on what a differential fluid brand states about having the friction modifier in their fluid. Buy the required amount of friction modifier and add it to the differential.
I think this is why I lost my differential after using Red Line fluid.
Some RL fluids have the additive, some don't. Which one did you use??
The one with the additive. (75W140)
http://www.redlineoil.com/product.aspx?pid=134
Originally Posted By: BlueOvalFitter
I used Red Line in the past and lost a differential afterwards.
I have used Royal Purple and WM ST without any problems.
IMO, I think if a differential calls for a friction modifier DO NOT rely solely on what a differential fluid brand states about having the friction modifier in their fluid. Buy the required amount of friction modifier and add it to the differential.
I think this is why I lost my differential after using Red Line fluid.
Some RL fluids have the additive, some don't. Which one did you use??
The one with the additive. (75W140)
http://www.redlineoil.com/product.aspx?pid=134
Many Motorcraft fluids say "engineered by Ford" but the 75w-140 is not one of them. It is a standard Conoco Philips product.
No reason to use it over Red Line or Amsoil.
No reason to use it over Red Line or Amsoil.
Valvoline 75w140 is the easiest oil to find where I live. I used it in many cars and trucks with no problem. Most 75w140 synthetic costs close to $20 where I live.
I have had good luck with RP 75w140 in my truck and MC 75w140 in the explorer. Both are quality products as far as im concerned, but the only reason im running MC is because the explorer is serviced by the dealer.
Originally Posted By: artificialist
Most 75w140 synthetic costs close to $20 where I live.
Yes, sadly, it is the one weight/example of an 'on the shelf' at most chain stores type fluid costing as much as (or even MORE than), a great 'boutique' gear oil.
Most 75w140 synthetic costs close to $20 where I live.
Yes, sadly, it is the one weight/example of an 'on the shelf' at most chain stores type fluid costing as much as (or even MORE than), a great 'boutique' gear oil.
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