what fluid to use?
#1
09-17-2012, 01:04 PM
Administrator
Thread Starter
Join Date: Jan 2010
Posts: 1,200
what fluid to use?
ok, so I had my front and rear differential fluids as well as transfer case fluid replaced. the used 75w/90 supersyn iii with LSD additive in all three. is this correct? the service manual says dexron vi for the transfer case. which is correct? this is in a caddy dealer and the service guy said it is what they use for the transfer case. is this correct hillbilly?
#3
09-18-2012, 08:35 AM
Ridiculously Active Enthusiast
Join Date: Sep 2009
Posts: 940
Re: what fluid to use?
Transfer cases have been ATF for years now. I don't know where the gear lube idea is coming from. The axles came with synthetic smelly gear lube.
Last edited by Hillbilly_Hybrid; 09-18-2012 at 08:37 AM. Reason: spelling
#4
09-18-2012, 09:38 AM
Administrator
Thread Starter
Join Date: Jan 2010
Posts: 1,200
Re: what fluid to use?
how do they flush out the differential in there? flush it with the dexron vii. will a mixture mess up the transfer case? like in the tranny? where oil contamination is serious business?
#5
09-18-2012, 07:20 PM
Ridiculously Active Enthusiast
Join Date: Sep 2009
Posts: 940
Re: what fluid to use?
I believe the transfer case has a drain plug. The gear lube may have had clutch "stuff" but a drain when warm to hot followed by a fill with the right Dex 6 and a flush should do it. Maybe Dex 3 for flush to save a little $. The 4WD Auto clutch is supposed to apply in a quarter second or less but only in Auto and when axle-to-axle slip is detected. As such there isn't an inter-axle differential any more like the AWD cousin and older "Full Time" systems.
In Auto it is like locking in the old school front hubs. Both front axle half shafts, differential, and front drive shaft are all rotating close to rear shaft speeds. If slip is detected the clutch grabs.
I still don't get why they still insisted on gear lube. Fluids are spelled out in owner's manuals.
The trans has clutches that apply thousands of times. The right fluid is much more important there.
No big deal but an expensive nuisance.
In Auto it is like locking in the old school front hubs. Both front axle half shafts, differential, and front drive shaft are all rotating close to rear shaft speeds. If slip is detected the clutch grabs.
I still don't get why they still insisted on gear lube. Fluids are spelled out in owner's manuals.
The trans has clutches that apply thousands of times. The right fluid is much more important there.
No big deal but an expensive nuisance.
Last edited by Hillbilly_Hybrid; 09-18-2012 at 07:22 PM. Reason: add picture
#6
09-18-2012, 07:34 PM
Administrator
Thread Starter
Join Date: Jan 2010
Posts: 1,200
Re: what fluid to use?
they said it is what they use in all escalades hybrid and non-hybrid, really? the BG rep promoted it and said warranties it(transfer case )for lifetime if replaced at 75k which isn't realistic since replacement is at 100k miles. So, they will drain and flush it and replace it with A/C Delco dexron VI. what a nuisance.
#7
09-19-2012, 07:23 PM
Ridiculously Active Enthusiast
Join Date: Sep 2009
Posts: 940
Re: what fluid to use?
The thicker axle lube most likely won't break anything. However, the viscous spin losses will add drag and cost some fuel. Most will never notice but you are putting some serious miles on that ride.
Torque * rpm = power. Thicker heavier lube = torque. Driving = rpm.
Torque * rpm = power. Thicker heavier lube = torque. Driving = rpm.
Thread
Topic Starter
Forum
Replies
Last Post
atikovi
Honda Civic Hybrid
1
12-22-2006 12:40 PM
