Recent Topics
How Often To Use CRC IVC ?
by ChrisD46 - 11/19/19 03:28 AM
SEARS: 4 Stroke/Lawnmower Maintenance Deals
by GumbyJarvis - 11/19/19 02:17 AM
Pepboys Coupon
by Xeno - 11/19/19 02:12 AM
Pennzoil “Designed for Your Drive”
by LubeFiner - 11/19/19 02:09 AM
Ebay $15 of $75 purchase
by GMguy84 - 11/19/19 12:06 AM
How thorough are coolant flushes at auto shops?
by Whammo - 11/18/19 10:58 PM
Fixed Orifice PCV design and issues.
by Talent_Keyhole - 11/18/19 10:44 PM
Redline Si-1 turning the light out
by lukejo - 11/18/19 10:16 PM
Quickjack BL-7000EXT
by The Critic - 11/18/19 08:27 PM
'17 Accent
by Al - 11/18/19 07:40 PM
considering a newer car.
by JustinH - 11/18/19 06:56 PM
2007 Accord - P0420 Code
by maverickfhs - 11/18/19 06:52 PM
2009 Ford Focus UOA Mag 1 5W30 4265 miles
by tomcruise - 11/18/19 06:09 PM
What’s in HM oil ?
by kstanf150 - 11/18/19 06:03 PM
Heater Core replacement 1997 Explorer
by racer44 - 11/18/19 06:01 PM
No shocker, but a rip-off story...
by KGMtech - 11/18/19 05:55 PM
AGM Question
by Bear - 11/18/19 05:36 PM
1970 engine noise
by 007 - 11/18/19 04:59 PM
Jalopnik Financial Suggestion
by madRiver - 11/18/19 04:46 PM
Newest Members
Joe_Cena, MickWK, DaveOilStack, spiffy63, WhiteMega1227
69911 Registered Users
Who's Online Now
72 registered members (aquariuscsm, Astro14, AndyB, 94astro, 2002 Maxima SE, 69Torino, 9 invisible), 1,399 guests, and 22 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics297,619
Posts5,119,396
Members69,911
Most Online3,589
Nov 2nd, 2019
Donate to BITOG
Print Thread
Hop To
Opinions on diff fluid change with mityvac? #4777159 06/04/18 10:39 AM
Joined: Jan 2010
Posts: 135
M
monster1 Offline OP
OP Offline
M
Joined: Jan 2010
Posts: 135
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 11:11 AM
Joined: Jan 2004
Posts: 6,019
N
nthach Offline
Offline
N
Joined: Jan 2004
Posts: 6,019
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 11:43 AM
Joined: Jun 2011
Posts: 753
229 Offline
Offline
Joined: Jun 2011
Posts: 753
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 12:09 PM
Joined: Jan 2010
Posts: 135
M
monster1 Offline OP
OP Offline
M
Joined: Jan 2010
Posts: 135
I'll pull the covers. Thanks.

Re: Opinions on diff fluid change with mityvac? [Re: monster1] #4777397 06/04/18 03:06 PM
Joined: Jan 2010
Posts: 135
M
monster1 Offline OP
OP Offline
M
Joined: Jan 2010
Posts: 135
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 03:07 PM.
Re: Opinions on diff fluid change with mityvac? [Re: monster1] #4777405 06/04/18 03:10 PM
Joined: Sep 2015
Posts: 217
J
JEL01 Offline
Offline
J
Joined: Sep 2015
Posts: 217
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
09 Honda Accord V6
13 Lexus RX350 AWD
02 Toyota Tundra 4x4
18 Lexus GX460
Re: Opinions on diff fluid change with mityvac? [Re: monster1] #4777424 06/04/18 03:27 PM
Joined: Jun 2008
Posts: 1,038
B
Billy_D Offline
Offline
B
Joined: Jun 2008
Posts: 1,038
I dont 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 03:45 PM
Joined: Jul 2005
Posts: 33,413
D
demarpaint Offline
Offline
D
Joined: Jul 2005
Posts: 33,413
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 10:13 AM
Joined: Jan 2010
Posts: 135
M
monster1 Offline OP
OP Offline
M
Joined: Jan 2010
Posts: 135
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 07:05 PM
Joined: Sep 2015
Posts: 2,744
Z
zeng Offline
Offline
Z
Joined: Sep 2015
Posts: 2,744
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™