Recent Topics
MK7.5 GTi- Oil and Injector cleaner
by Striker - 08/18/19 12:17 PM
Cheap Hack for Cheap Sunglasses
by RayCJ - 08/18/19 10:55 AM
Detailed Engine using Infinity Wax Rubber Wax
by buster - 08/18/19 10:52 AM
Nissan 15208 9E01A oil filter
by passgas55 - 08/18/19 10:35 AM
Infinity Wax Rubber Wax
by buster - 08/18/19 10:01 AM
Bad oil pressure sensor?
by HoosierJeeper - 08/18/19 10:00 AM
So many oil changes, so little time....
by cwhard - 08/18/19 09:10 AM
What oil did iroc use?
by Red91 - 08/18/19 09:09 AM
Differential cover "load bolts"?
by kehyler - 08/18/19 07:39 AM
Havoline Box
by JLTD - 08/18/19 07:17 AM
Best Oil Change Ramps ??
by billt460 - 08/18/19 05:20 AM
About the original manual recommended viscosity
by dolala - 08/18/19 05:19 AM
Is Z&P concentration extrapolable from SAPS % ?
by FordCapriDriver - 08/18/19 01:36 AM
Funny oil change moment
by cwilliamsws6 - 08/17/19 10:38 PM
High pitched squeal from new muffler
by Mark72 - 08/17/19 10:19 PM
Delvac super 1300 15w-40 $8.99 TSC
by Capt - 08/17/19 10:01 PM
Flat spotting question
by RyanY - 08/17/19 09:27 PM
Newest Members
CatCam2, dls56, biskandar, Bob2, Jasonbw1985
68985 Registered Users
Who's Online Now
87 registered members (53' Stude, aquariuscsm, Astro_Guy, advocate, atikovi, AlienBug, 9 invisible), 2,198 guests, and 28 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics293,459
Posts5,040,660
Members68,985
Most Online3,532
Jul 30th, 2019
Donate to BITOG
Print Thread
Hop To
Opinions on diff fluid change with mityvac? #4777159 06/04/18 11:39 AM
Joined: Jan 2010
Posts: 132
M
monster1 Offline OP
OP Offline
M
Joined: Jan 2010
Posts: 132
Hey guys, I'm wanting to change my diff gear oil in my 04 2500 5.9l cummins 4x4. Should I completely pull the covers or will using a mityvac suck and swap be ok? Odometer is about 75k. First service.

Re: Opinions on diff fluid change with mityvac? [Re: monster1] #4777181 06/04/18 12:11 PM
Joined: Jan 2004
Posts: 5,509
N
nthach Offline
Offline
N
Joined: Jan 2004
Posts: 5,509
If you can get the Mityvac to pick up from the bottom of the diff, I think it should work but it could struggle with the thicker gear oil. I would try it with the diff oil warm.

Pulling the diff cover isn't a bad idea if not messy. I would go that way to avoid any drama. If you were planning on swapping diff covers to a Mag-Hytec or similar with a drain plug it's also a good time.

Re: Opinions on diff fluid change with mityvac? [Re: monster1] #4777225 06/04/18 12:43 PM
Joined: Jun 2011
Posts: 752
229 Offline
Offline
Joined: Jun 2011
Posts: 752
Slow but better than not refreshing. Pull the covers so you can wipe out the slime. Use Mopar gear RTV or compatible black gear oil RTV silicone.

Re: Opinions on diff fluid change with mityvac? [Re: monster1] #4777249 06/04/18 01:09 PM
Joined: Jan 2010
Posts: 132
M
monster1 Offline OP
OP Offline
M
Joined: Jan 2010
Posts: 132
I'll pull the covers. Thanks.

Re: Opinions on diff fluid change with mityvac? [Re: monster1] #4777397 06/04/18 04:06 PM
Joined: Jan 2010
Posts: 132
M
monster1 Offline OP
OP Offline
M
Joined: Jan 2010
Posts: 132
Pulled the cover to the rear. Gear oil was dark. But no shavings and everything was really clean. Put in 3 quarts of Lucas full synthetic 75w-90 and tightened everything back up. I think the front diff will wait for now since the rear was so clean. Too dang hot for me to be working in the sun.

Last edited by monster1; 06/04/18 04:07 PM.
Re: Opinions on diff fluid change with mityvac? [Re: monster1] #4777405 06/04/18 04:10 PM
Joined: Sep 2015
Posts: 196
J
JEL01 Offline
Offline
J
Joined: Sep 2015
Posts: 196
Good on you for taking care of it,
You are now ahead of 99% of other drivers, BITOGers excluded smile


Cars I maintain:
02 Mercedes CLK430-Edge 0w40
05 Honda Accord V6-Maxlife 5w30
13 Lexus RX350 AWD-M1 AFE 0w20
02 Toyota Tundra 4x4 M1 5w30
Re: Opinions on diff fluid change with mityvac? [Re: monster1] #4777424 06/04/18 04:27 PM
Joined: Jun 2008
Posts: 1,038
B
Billy_D Offline
Offline
B
Joined: Jun 2008
Posts: 1,038
I donít bother pulling the cover on my truck. I just use an oil extractor every 40k miles. The process is painfully slow.

Re: Opinions on diff fluid change with mityvac? [Re: monster1] #4777439 06/04/18 04:45 PM
Joined: Jul 2005
Posts: 32,725
D
demarpaint Offline
Offline
D
Joined: Jul 2005
Posts: 32,725
Originally Posted By: monster1
I'll pull the covers. Thanks.


If you don't have a drain plug, that's what I'd do. thumbsup


God Bless Our Troops

Re: Opinions on diff fluid change with mityvac? [Re: monster1] #4778998 06/06/18 11:13 AM
Joined: Jan 2010
Posts: 132
M
monster1 Offline OP
OP Offline
M
Joined: Jan 2010
Posts: 132
I towed my 4k lb boat yesterday on a 50 mile round trip. I know this is nothing for a 3/4 ton truck but the lazer thermometer showed the differential running at 150 degrees in 100 degree heat. Looks like that Lucas synthetic gear oil does it's job. I was a bit concerned I made a wring choice if lubricants because it's not a very popular product as far as the internet is concerned.

Re: Opinions on diff fluid change with mityvac? [Re: monster1] #4779556 06/06/18 08:05 PM
Joined: Sep 2015
Posts: 2,663
Z
zeng Offline
Offline
Z
Joined: Sep 2015
Posts: 2,663
150F diff temperature towing is fantastic for Lucas 75W90 with a high [email protected]*C of 142 cSt.

Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™