How Do I Check Diff and Trans Fluids

Diffs, axles, lockers, transmissions, portals, that kind of thing.
Post Reply
Doug308
United States of America
Posts: 35
Joined: Mon Jun 18, 2018 10:28 pm
Location: St. Louis, MO

How Do I Check Diff and Trans Fluids

Post by Doug308 »

I just ordered my service manual but want to stay on top of things.

How do I check diff and trans fluid?
No one is coming. It’s up to us.
Twin Pinzies
Posts: 545
Joined: Mon Jan 03, 2005 1:33 pm
Location: San Juan Mountains, CO

Re: How Do I Check Diff and Trans Fluids

Post by Twin Pinzies »

Checking the F&R differentials, transfer case, and transmission fluids requires removing the "fill plugs" and the "level plugs."
The level plugs are the middle ones... There are three plugs per gearbox... The top one is the "add fluid" plug, the middle one is the "level plug", and the bottom one is the "drain plug."
Remove the "fill plugs" and the "level plugs", then top off the fill plug until fluid starts to come out of the "level plug." That means it's full.

*Use only GL-4 fluid in the transmission ans transfer cases. And use either GL-4 or GL-5 in the differentials.
I drain and replace mine once a year.
User avatar
VinceAtReal4x4s
Admin
United States of America
Posts: 2035
Joined: Mon Apr 12, 2004 10:36 pm
Location: Ca. or lost in South West USA
Contact:

Re: How Do I Check Diff and Trans Fluids

Post by VinceAtReal4x4s »

And just to point out, some of the high-end synthetic gear oils like Royal Purple's GL-5 gear oils are actually GL-4 safe as well.
"For those who risk, life has a flavor the protected shall never enjoy"

Your donation makes this site possible!

Image
User avatar
edzz
United States of America
Posts: 1309
Joined: Tue Aug 11, 2009 12:13 am
Location: Coeur d'Alene, ID

Re: How Do I Check Diff and Trans Fluids

Post by edzz »

Remember never remove a drain plug without first insuring that you can remove the corresponding fill plug. :lol:
Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.
Doug308
United States of America
Posts: 35
Joined: Mon Jun 18, 2018 10:28 pm
Location: St. Louis, MO

Re: How Do I Check Diff and Trans Fluids

Post by Doug308 »

Thanks guys
No one is coming. It’s up to us.
scoot
United States of America
Posts: 11
Joined: Fri Jan 08, 2016 12:11 pm
Location: South Florida
Contact:

Re: How Do I Check Diff and Trans Fluids

Post by scoot »

I am actually just getting ready to do mine also. I bought a gallon of the Redline. Is that enough to do all the tranny fluids?
FDNY 343
Always remember 9/11/2001
User avatar
TechMOGogy
Canada
Posts: 2831
Joined: Wed Feb 01, 2012 11:39 am
Location: Ontario, Canada

Re: How Do I Check Diff and Trans Fluids

Post by TechMOGogy »

Assume you have manuals - if not it should be 1st purchase
Attachments
BC98B26E-7F44-4203-8DF3-29E31D367BBD.jpeg
BC98B26E-7F44-4203-8DF3-29E31D367BBD.jpeg (505.5 KiB) Viewed 5382 times
72 Pathfinder | 75 710M 2.7i | 96 350GDT Worker
Post Reply