It might be placebo effect, but I think it's a tad quieter. (I've heard howling diffs before and this truck doesn't have them.)
post your latest differential fluid change
- Thread starter electrolover
- Start date
- Joined
- Mar 9, 2024
- Messages
- 167
2011 BMW 328I XDRIVE E90 43k miles
Replaced original rear differential fluid with Delvac 75w90. The 14 year old fluid came out mostly looking like yellow honey. Some areas were slightly cloudy. This "lifetime fluid " probably didn't need to be changed- yet.
After seeing the condition of the R. Diff fluid, I will likely wait 10k miles to replace the Front Diff, transmission & TC fluids.
Replaced original rear differential fluid with Delvac 75w90. The 14 year old fluid came out mostly looking like yellow honey. Some areas were slightly cloudy. This "lifetime fluid " probably didn't need to be changed- yet.
After seeing the condition of the R. Diff fluid, I will likely wait 10k miles to replace the Front Diff, transmission & TC fluids.
2020 GX460 48,714 Miles, drained the OEM fluid out. Filled Front and Rear diffs with Delvac and Transfercase with Redline.
Only observation was the front drain plug had more on the magnet than the rear, otherwise routine maintenance
PS: let's keep the Delvac train going
Only observation was the front drain plug had more on the magnet than the rear, otherwise routine maintenance
PS: let's keep the Delvac train going
4WD
$50 site donor 2025
Been using Delvac 1 in my GM 4WD’s for years …2020 GX460 48,714 Miles, drained the OEM fluid out. Filled Front and Rear diffs with Delvac and Transfercase with Redline.
Only observation was the front drain plug had more on the magnet than the rear, otherwise routine maintenance
PS: let's keep the Delvac train going
View attachment 261503
On my Jeep - it’s in the front with ASG in the rear …
Jordan_FX4
$50 Site Donor 2022
2022 Toyota Tundra with 30,095 miles. Mostly metallic gunk on the drain plug, but there was a large sliver of metal stuck to the magnet. Still need to do the front differential and transfer case. Hopefully I can get to that next weekend.
Out: 5.6 quarts Factory Fill 75W-85
In: 5.6 quarts HPL Diff Life 75W-110
Out: 5.6 quarts Factory Fill 75W-85
In: 5.6 quarts HPL Diff Life 75W-110
Jordan_FX4
$50 Site Donor 2022
Part 2 on the Tundra. 30,585 miles and changed out the front diff and T-case fluid.
Front Differential:
Out: 2.7 pints factory fill 75W-85
In: 2.7 pints Royal Purple 75W-90
Transfer Case:
Out: 2.25 qts factory fill Toyota WS ATF
In: 2.25 qts Toyota WS ATF
Front Differential:
Out: 2.7 pints factory fill 75W-85
In: 2.7 pints Royal Purple 75W-90
Transfer Case:
Out: 2.25 qts factory fill Toyota WS ATF
In: 2.25 qts Toyota WS ATF
2004 Ford Escape, 227,000km. Unsure what came out. The levels appeared fine and nothing was filthy black.
Rear diff got 75w90 group 4 synthetic.
The PTU received the same brand, group 4 80w140.
Rear diff got 75w90 group 4 synthetic.
The PTU received the same brand, group 4 80w140.
edyvw
$50 site donor 2025
2011 VW Tiguan, 110.000 miles
Front Differential:
Out: OE fluid (Was surprised how clean it was, 60k on it).
In: Motul Gear 300 75W90
Rear Differential:
Out: OE fluid (super clean, looking new)
In: Motul Gear 300 75W90
Haldex:
Out: OE Fluid (40k, looking good)
In: Ravenol AWD-H
Haldex 4th generation has filter, this is new:
This is old. OMG, this thing gave me such a hard time. I was prying out this filter for probably 2hrs,, more precisely, that yellowish plastic piece. It is such a tight fit that it creates a vacuum that prevents it from getting out. After drilling into it and doing all kinds of monkey business, I finally managed to get some leverage and pry it out.
Front Differential:
Out: OE fluid (Was surprised how clean it was, 60k on it).
In: Motul Gear 300 75W90
Rear Differential:
Out: OE fluid (super clean, looking new)
In: Motul Gear 300 75W90
Haldex:
Out: OE Fluid (40k, looking good)
In: Ravenol AWD-H
Haldex 4th generation has filter, this is new:
This is old. OMG, this thing gave me such a hard time. I was prying out this filter for probably 2hrs,, more precisely, that yellowish plastic piece. It is such a tight fit that it creates a vacuum that prevents it from getting out. After drilling into it and doing all kinds of monkey business, I finally managed to get some leverage and pry it out.
4WD
$50 site donor 2025
2017 Tahoe 4WD @ 100k - 40k on fluids
Rear axle: Out/In = Delvac 1 75W90
Xfer case: Out = Transmax - In = Valvoline EP
Rear axle: Out/In = Delvac 1 75W90
Xfer case: Out = Transmax - In = Valvoline EP
- Joined
- May 9, 2023
- Messages
- 270
24 F150 Powerboost
Rear cover change, 1/2 qt cap increase
LubeLocker gasket
ARP hardware
3.25 qts Mobil 1, 75w90
Rear cover change, 1/2 qt cap increase
LubeLocker gasket
ARP hardware
3.25 qts Mobil 1, 75w90
Last edited:
That’s a nice looking differential cover and upgrade. So much easier to change the fluid.
- Joined
- May 9, 2023
- Messages
- 270
Yes, that was my main reason for this cover change. This also holds just a hair over a half a quart more. My logic may be flawed, but it is my belief that more fluid equals cooler fluid, thus possibly extending the life slightly.
1996 Chevy K1500, 298,898 miles, had to replace the right axle seal, which requires removing the rear differential cover to remove the C-clips that hold the axle in.
Out: 2 quarts 26 oz of Valvoline 80W90
In: 2 quarts 20 oz Pennzoil 80W90.
Out: 2 quarts 26 oz of Valvoline 80W90
In: 2 quarts 20 oz Pennzoil 80W90.
BrendanC
$100 site donor 2024
buddy of mine
2019 silverado 1500 5.3L/8l90
115k miles
out: factory fill
in: Valvoline Synthetic 75w90.
factory fluid didn’t look terrible and diff was very clean inside considering he’s lifted on 35’s and drives like he stole it
2019 silverado 1500 5.3L/8l90
115k miles
out: factory fill
in: Valvoline Synthetic 75w90.
factory fluid didn’t look terrible and diff was very clean inside considering he’s lifted on 35’s and drives like he stole it
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