plus when you have to remove the cover to drain you usually replace the gasket as well (especially if it's RTV) which means a fresh seal on the diff
post your latest differential fluid change
- Thread starter electrolover
- Start date
2004 Trailblazer....... 134,000 miles
Out: FF (nasty.... I know I should have done this a long time ago)
That fill plug was a pain..... thanks to PB Blaster I got it
IN: M1 75W90
JP
Out: FF (nasty.... I know I should have done this a long time ago)
That fill plug was a pain..... thanks to PB Blaster I got it
IN: M1 75W90
JP
Finally performed a diff. service on Ol' Yeller, '77 F250.
-Valvoline Synpower 75w140
-Lubegard Gear Supplement
-The right stuff RTV sealant, this stuff is awesome!
Didn't add any FM, as Valvoline claims it's already in there. So far, so good. Unknown miles on the unit, but the Motorcraft 75w140 that I drained looked pretty good.
-Valvoline Synpower 75w140
-Lubegard Gear Supplement
-The right stuff RTV sealant, this stuff is awesome!
Didn't add any FM, as Valvoline claims it's already in there. So far, so good. Unknown miles on the unit, but the Motorcraft 75w140 that I drained looked pretty good.
02 Silverado 1500 with G80 rear locker.
Out: Valvoline 75W90.
In: Eneos 75W90. Has no LS additives since rear end does not need FM to work.
Out: Valvoline 75W90.
In: Eneos 75W90. Has no LS additives since rear end does not need FM to work.
2006 Silverado
Front diff: 80w90 Shell Spirax
Rear diff: 75w90 syn Master pro
Front diff: 80w90 Shell Spirax
Rear diff: 75w90 syn Master pro
2010 Nissan Frontier 4.0 V6 2WD - 69K
Rear Differential
Out: Original??? [Was very clean...almost wished I'd left it in]
In: Red Line 75W90 GL-5 Gear Oil
Rear Differential
Out: Original??? [Was very clean...almost wished I'd left it in]
In: Red Line 75W90 GL-5 Gear Oil
2000 Ford Explorer XLT 4WD @ ~179K
Front
Out: Lucas synthetic 75W140
In: Lucas synthetic 75W90
Rear (3.73:1 Traction-Lok)
Out: Factory fill (synthetic 75W140) "Rear axles containing synthetic lubricant are lubricated for life. These lubricants are not to be checked or changed unless a leak is suspected or service is required. The axle lubricant should be changed any time the axle has been submerged in water."
In: Lucas synthetic 75W140
Front
Out: Lucas synthetic 75W140
In: Lucas synthetic 75W90
Rear (3.73:1 Traction-Lok)
Out: Factory fill (synthetic 75W140) "Rear axles containing synthetic lubricant are lubricated for life. These lubricants are not to be checked or changed unless a leak is suspected or service is required. The axle lubricant should be changed any time the axle has been submerged in water."
In: Lucas synthetic 75W140
2002 Ford CVPI, 157K.
Out: Very black, thin compound of unknown grade, type and age. Evidence present of previous changes, thankfully.
In: Valvoline Synpower 75W90LS.
I actually hadnt intended to get gear oil, but I was perusing the selection at AZ and found the Synpower specified meeting SAE J2360. I was very surprised, so I decided on a whim to take some home and do a change. Glad I did after I saw what was in there.
The LSD seems content with the amount of FM present. No chattering or noise has been heard since. I have confirmed it still works too. Several times.
Out: Very black, thin compound of unknown grade, type and age. Evidence present of previous changes, thankfully.
In: Valvoline Synpower 75W90LS.
I actually hadnt intended to get gear oil, but I was perusing the selection at AZ and found the Synpower specified meeting SAE J2360. I was very surprised, so I decided on a whim to take some home and do a change. Glad I did after I saw what was in there.
The LSD seems content with the amount of FM present. No chattering or noise has been heard since. I have confirmed it still works too. Several times.
1992 Toyota Previa, 133k miles.
Out: Royal Purple 75w-90, about 66k miles.
In: Mobil 1 75w-90 LS.
The drain plug magnet had a very little sludge on it. Fluid was opaque and dark, and subjectively, seemed a bit thick.
Out: Royal Purple 75w-90, about 66k miles.
In: Mobil 1 75w-90 LS.
The drain plug magnet had a very little sludge on it. Fluid was opaque and dark, and subjectively, seemed a bit thick.
2006 GMC Sierra 2500HD
Front and Rear
Out: Amsoil Severe Gear 75w90
In: Delvac Syn 75w90 (Not the thinner Mobil 1 LS 75w90 stuff)
The front diff had a lot of fine deposits on the magnetic plug.
The rear was super clean.
Front and Rear
Out: Amsoil Severe Gear 75w90
In: Delvac Syn 75w90 (Not the thinner Mobil 1 LS 75w90 stuff)
The front diff had a lot of fine deposits on the magnetic plug.
The rear was super clean.
1997 Ford F-150 XLT
FRONT: OUT unknown (looked like battle ship grey paint), IN Traveler (Tractor Supply) 75-90.
REAR: OUT unknown dirty odor free fluid, IN Walmart 75-140 Synthetic ("synthetic only" notice on tag).
Kira
FRONT: OUT unknown (looked like battle ship grey paint), IN Traveler (Tractor Supply) 75-90.
REAR: OUT unknown dirty odor free fluid, IN Walmart 75-140 Synthetic ("synthetic only" notice on tag).
Kira
At 34K miles, Shell Spirax S 75W-90 full synthetic in my 1987 Alfa Romeo in rear diff and transmission really smoothed out those 2nd gear shifts.
2013 Subaru Forester
Front:
Out: Factory Fill (complete with disco bits)
In: Royal Purple 75w-90
Rear:
Out: Factory Fill (disco bits and some kibbles)
In: Royal Purple 75w-90
2008 Subaru Impreza STI
Front(6 speed trans with two diffs all in a common sump):
Out: Valvoline 75w-90, looked good but I couldn't tell before I pulled the plug.
In: Valvoline 75w-90
Rear:
Out: Valvoline 75w-90, had been tore up.
In: Amsoil 75w-110
Front:
Out: Factory Fill (complete with disco bits)
In: Royal Purple 75w-90
Rear:
Out: Factory Fill (disco bits and some kibbles)
In: Royal Purple 75w-90
2008 Subaru Impreza STI
Front(6 speed trans with two diffs all in a common sump):
Out: Valvoline 75w-90, looked good but I couldn't tell before I pulled the plug.
In: Valvoline 75w-90
Rear:
Out: Valvoline 75w-90, had been tore up.
In: Amsoil 75w-110
Out: 2,000 km old VP Fuels 85W140 syn
In: Redline 75W140 syn
Next step will be to replace 50% with Redline 75W90
In: Redline 75W140 syn
Next step will be to replace 50% with Redline 75W90
2010 F150, Synpower 75w140.
2002 Ford CVPI, 158K.
Out: Valvoline Synpower 75W90LS.
I didnt intend to change the differential fluid after not even 1000 miles of use; However, I discovered that I had over 1/16" of end play on the axle shafts. It was actually kind of scary how much they moved. So I pulled it all apart. The reason was due to the traction-lok clutch packs being worn out.
After rebuilding I have axle shaft end play of around .010".
In: Valvoline Synpower 75W90LS.
Still no chatter or groaning from the differential even with fresh clutches. I didnt add any FM to the differential itself, though I did soak the clutches in FM, as required.
Out: Valvoline Synpower 75W90LS.
I didnt intend to change the differential fluid after not even 1000 miles of use; However, I discovered that I had over 1/16" of end play on the axle shafts. It was actually kind of scary how much they moved. So I pulled it all apart. The reason was due to the traction-lok clutch packs being worn out.
After rebuilding I have axle shaft end play of around .010".
In: Valvoline Synpower 75W90LS.
Still no chatter or groaning from the differential even with fresh clutches. I didnt add any FM to the differential itself, though I did soak the clutches in FM, as required.
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