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Had to service a Cadillac SRX rear diff today... #4630859
01/10/18 08:48 PM
01/10/18 08:48 PM
Joined: Aug 2017
Posts: 805
MN
14Accent Offline OP
14Accent  Offline OP

Joined: Aug 2017
Posts: 805
MN
Looked up the fluid... There's 2 on this unit. It's a Haldex supplied clutch pack system, almost identical to what's used in Saab, Ford, and Volvo.

The fluid for the differential clutch pack, GM part #88863349, was almost $64 a quart, my price! I've seen some insanely priced fluid, but c'mon. It says right on the bottle that it's just 75w90. What could be so special about this stuff?

Last edited by 14Accent; 01/10/18 08:49 PM.

2013 Chevrolet Volt - Saves enough in fuel to pay for itself!

2003 Cadillac Seville STS - The winter "beater", it uses the Volt's fuel
Re: Had to service a Cadillac SRX rear diff today... [Re: 14Accent] #4630868
01/10/18 09:04 PM
01/10/18 09:04 PM
Joined: Jul 2013
Posts: 1,871
Ottumwa, Iowa
jhellwig Offline
jhellwig  Offline

Joined: Jul 2013
Posts: 1,871
Ottumwa, Iowa
The fact that it is a gl4 multigrade.


Sparks fly from my fingers.

1995 Chevy K2500 Suburban lt 5.7
2014 Toyota Sienna
1983 Chevy K5 350
Re: Had to service a Cadillac SRX rear diff today... [Re: 14Accent] #4630897
01/10/18 09:40 PM
01/10/18 09:40 PM
Joined: Oct 2010
Posts: 1,862
.
Danh Offline
Danh  Offline

Joined: Oct 2010
Posts: 1,862
.
Motorcraft full-syn 75w90 GL4 equivalent retials for half the price.

Re: Had to service a Cadillac SRX rear diff today... [Re: 14Accent] #4630916
01/10/18 09:58 PM
01/10/18 09:58 PM
Joined: May 2015
Posts: 692
California
SavagePatch Offline
SavagePatch  Offline

Joined: May 2015
Posts: 692
California
Dang! That's a steep price.

Perhaps Redline MT90 would suffice?

Re: Had to service a Cadillac SRX rear diff today... [Re: 14Accent] #4630948
01/10/18 10:52 PM
01/10/18 10:52 PM
Joined: Feb 2014
Posts: 2,791
workbench CZ-USA KS KC
Marco620 Offline
Marco620  Offline

Joined: Feb 2014
Posts: 2,791
workbench CZ-USA KS KC
Call Dave at Redline Oil. He can get you better for way less with a better fluid. GM just trying to rip people to save their Union bailout.


15' Civic 1.8 i-vtec 222,222+ mi Redline oil/cvt fluid & Archoil9100
Just say no to drugs, union made cars and amsoil.
Son of a Navy Corpsman. Support vets!


Re: Had to service a Cadillac SRX rear diff today... [Re: Marco620] #4630961
01/10/18 11:04 PM
01/10/18 11:04 PM
Joined: Dec 2013
Posts: 2,875
Fort Worth, Texas
clinebarger Offline
clinebarger  Offline

Joined: Dec 2013
Posts: 2,875
Fort Worth, Texas
Originally Posted By: Marco620
GM just trying to rip people to save their Union bailout.


Yep, GM is the only manufacturer to ever overcharge for fluids!


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: Had to service a Cadillac SRX rear diff today... [Re: 14Accent] #4630980
01/11/18 12:02 AM
01/11/18 12:02 AM
Joined: Jan 2009
Posts: 6,808
New England
gathermewool Offline
gathermewool  Offline

Joined: Jan 2009
Posts: 6,808
New England
I don't understand why they call for GL-4 MTF in a clutch-pack rear limited-slip rear diff.

I would think a GL-5 gear lube with limited slip additive would make a lot more sense. I'm sure I'm missing something.


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter (64,774 miles)
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter (40,803 miles)
Re: Had to service a Cadillac SRX rear diff today... [Re: 14Accent] #4631023
01/11/18 03:56 AM
01/11/18 03:56 AM
Joined: Jan 2018
Posts: 914
San Antonio, TX
das_peikko Offline
das_peikko  Offline

Joined: Jan 2018
Posts: 914
San Antonio, TX
What year was the Cadillac? I'm curious to know if it has the differential pump that's $400 to replace.

Re: Had to service a Cadillac SRX rear diff today... [Re: clinebarger] #4631058
01/11/18 06:44 AM
01/11/18 06:44 AM
Joined: Jul 2015
Posts: 4,709
Down Under
SR5 Offline
SR5  Offline

Joined: Jul 2015
Posts: 4,709
Down Under
Originally Posted By: clinebarger
Originally Posted By: Marco620
GM just trying to rip people to save their Union bailout.


Yep, GM is the only manufacturer to ever overcharge for fluids!


Yeah, try owning an Audi.
I had one of those, with it's special purple coolant and special PS fluid.

My next car was a GM.


---------------------------------------------------------------------------------
Castrol GTX Ultraclean 15W40 A3/B3 + Wesfil-Cooper Z154
Re: Had to service a Cadillac SRX rear diff today... [Re: gathermewool] #4631107
01/11/18 08:12 AM
01/11/18 08:12 AM
Joined: Dec 2006
Posts: 1,498
Michigan
MrHorspwer Offline
MrHorspwer  Offline

Joined: Dec 2006
Posts: 1,498
Michigan
Originally Posted By: gathermewool
I don't understand why they call for GL-4 MTF in a clutch-pack rear limited-slip rear diff.

I would think a GL-5 gear lube with limited slip additive would make a lot more sense. I'm sure I'm missing something.


There are two separate fluids in rear axle. One fluid lives with the hypoid gearset and lubricates it, along with all the bearings and the rest of the typical axle components. This fluid specíd here is a regular synthetic 75W90 GL5.

The other lives within the clutch pack, which is separate from the axle lube described above. The purpose of the fluid is to line the clutch pack and control the lockup characteristics of the clutch. Since there is no hypoid gearset, a GL5 fluid and itís extreme pressure additives arenít required. The really important part of this fluid is the additive pack and the friction modifiers.

The 88863349 fluid is specific to the Haldex clutch. Itís not the typical GL4 manual transmission fluid. Honestly, Iíve never seen it in the black Delco bottle that was posted above. Iíve only seen it in a silver cylindrical bottle with a prominent ďMade in SwedenĒ sticker on it and German translations on the label. Saab was a prominent user of this fluid when they rolled out the Haldex XWD system.

My advice: Use whatever you like for the axle, but the 88863349 fluid is quite specific for the Haldex. I donít think youíll find an appropriate alternative.

Re: Had to service a Cadillac SRX rear diff today... [Re: 14Accent] #4631250
01/11/18 11:00 AM
01/11/18 11:00 AM
Joined: Feb 2007
Posts: 3,775
Southeast
meep Offline
meep  Offline

Joined: Feb 2007
Posts: 3,775
Southeast
^^^ this ^^^. you do not want to monkey around with the fluid for the haldex components. If this is the same unit used in those europeans, it is hard on fluid. aside from a suggested aggressive service interval on this, a substitute won't only behave differently, but could also lead to early clutch failure.


2018 F150
2015 crv (wifey!)
Re: Had to service a Cadillac SRX rear diff today... [Re: MrHorspwer] #4631529
01/11/18 02:59 PM
01/11/18 02:59 PM
Joined: Apr 2016
Posts: 817
Specific Ocean
Kibitoshin Offline
Kibitoshin  Offline

Joined: Apr 2016
Posts: 817
Specific Ocean
Originally Posted By: MrHorspwer
Originally Posted By: gathermewool
I don't understand why they call for GL-4 MTF in a clutch-pack rear limited-slip rear diff.

I would think a GL-5 gear lube with limited slip additive would make a lot more sense. I'm sure I'm missing something.


There are two separate fluids in rear axle. One fluid lives with the hypoid gearset and lubricates it, along with all the bearings and the rest of the typical axle components. This fluid specíd here is a regular synthetic 75W90 GL5.

The other lives within the clutch pack, which is separate from the axle lube described above. The purpose of the fluid is to line the clutch pack and control the lockup characteristics of the clutch. Since there is no hypoid gearset, a GL5 fluid and itís extreme pressure additives arenít required. The really important part of this fluid is the additive pack and the friction modifiers.

The 88863349 fluid is specific to the Haldex clutch. Itís not the typical GL4 manual transmission fluid. Honestly, Iíve never seen it in the black Delco bottle that was posted above. Iíve only seen it in a silver cylindrical bottle with a prominent ďMade in SwedenĒ sticker on it and German translations on the label. Saab was a prominent user of this fluid when they rolled out the Haldex XWD system.

My advice: Use whatever you like for the axle, but the 88863349 fluid is quite specific for the Haldex. I donít think youíll find an appropriate alternative.


Had to google srx haldex to show the two seperate parts of the rear end.



Shin Gekiretsu Shin'ou'hou
01 Toyota Tundra 2WD V8 4.7L
02 Chevy Silverado C1500 V8 5.3L
Re: Had to service a Cadillac SRX rear diff today... [Re: MrHorspwer] #4631533
01/11/18 03:02 PM
01/11/18 03:02 PM
Joined: Apr 2017
Posts: 1,522
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline

Joined: Apr 2017
Posts: 1,522
Ontario, Canada
Originally Posted By: MrHorspwer
Originally Posted By: gathermewool
I don't understand why they call for GL-4 MTF in a clutch-pack rear limited-slip rear diff.

I would think a GL-5 gear lube with limited slip additive would make a lot more sense. I'm sure I'm missing something.


There are two separate fluids in rear axle. One fluid lives with the hypoid gearset and lubricates it, along with all the bearings and the rest of the typical axle components. This fluid specíd here is a regular synthetic 75W90 GL5.

The other lives within the clutch pack, which is separate from the axle lube described above. The purpose of the fluid is to line the clutch pack and control the lockup characteristics of the clutch. Since there is no hypoid gearset, a GL5 fluid and itís extreme pressure additives arenít required. The really important part of this fluid is the additive pack and the friction modifiers.

The 88863349 fluid is specific to the Haldex clutch. Itís not the typical GL4 manual transmission fluid. Honestly, Iíve never seen it in the black Delco bottle that was posted above. Iíve only seen it in a silver cylindrical bottle with a prominent ďMade in SwedenĒ sticker on it and German translations on the label. Saab was a prominent user of this fluid when they rolled out the Haldex XWD system.

My advice: Use whatever you like for the axle, but the 88863349 fluid is quite specific for the Haldex. I donít think youíll find an appropriate alternative.


Exactly. Just like the rear diffs on Acuras. Use the wrong fluid and the clutch packs will be jumping/binding every time you take a corner. But most of ours have a separate clutch pack on each axle side that are operated independently, not just one for the whole diff.

The GM stuff is still a [censored] of a lot cheaper than the BMW AWD unit fluid my old E90 used. Worst part about that was the unit used 0.6L, and they sold it in 1.0L amounts. Doh!

Last edited by mightymousetech; 01/11/18 03:11 PM.

Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: Had to service a Cadillac SRX rear diff today... [Re: mightymousetech] #4631643
01/11/18 05:27 PM
01/11/18 05:27 PM
Joined: Dec 2006
Posts: 1,498
Michigan
MrHorspwer Offline
MrHorspwer  Offline

Joined: Dec 2006
Posts: 1,498
Michigan
Originally Posted By: mightymousetech
But most of ours have a separate clutch pack on each axle side that are operated independently, not just one for the whole diff.


If you look at the cutaway photo above, you can see the two clutch packs. The one at the differential input (where the prop shaft would attach) is the "whole diff" clutch that controls power flow into the rear differential.

On the side of the input clutch pack is the clutch pump. There are two hydraulic lines that exit and go up and over the differential, into a clutch pack on the output side (where an axle shaft would bolt to). This clutch pack is the "eLSD" that controls power flow between the left and right rear wheels.

GM introduced this system with Haldex on Saabs (just before they were shut down, unfortunately). It also received use on the Cadillac SRX (twin to the Saab 9-4x) and numerous Epsilon platform vehicles (Opel Insignia, Buick Regal and Lacrosse, and Cadillac XTS). I believe the XTS is the last remaining vehicle still using this system. Most new GM's use an AWD system from GKN.

Re: Had to service a Cadillac SRX rear diff today... [Re: MrHorspwer] #4631660
01/11/18 05:47 PM
01/11/18 05:47 PM
Joined: Apr 2017
Posts: 1,522
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline

Joined: Apr 2017
Posts: 1,522
Ontario, Canada
Originally Posted By: MrHorspwer
Originally Posted By: mightymousetech
But most of ours have a separate clutch pack on each axle side that are operated independently, not just one for the whole diff.


If you look at the cutaway photo above, you can see the two clutch packs. The one at the differential input (where the prop shaft would attach) is the "whole diff" clutch that controls power flow into the rear differential.

On the side of the input clutch pack is the clutch pump. There are two hydraulic lines that exit and go up and over the differential, into a clutch pack on the output side (where an axle shaft would bolt to). This clutch pack is the "eLSD" that controls power flow between the left and right rear wheels.

GM introduced this system with Haldex on Saabs (just before they were shut down, unfortunately). It also received use on the Cadillac SRX (twin to the Saab 9-4x) and numerous Epsilon platform vehicles (Opel Insignia, Buick Regal and Lacrosse, and Cadillac XTS). I believe the XTS is the last remaining vehicle still using this system. Most new GM's use an AWD system from GKN.


Thank you!


Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
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