Fluid Capacities

[corey148]

Hello all, I own a 2018 Ram 1500 5.7 with 3.92 Axle with Limited Slip. I am going to be changing the front and rear differential fluids along with transfer case fluid in the near future. Does anyone know the fluid capacities of each of the differentials and transfer case??

Also, do you recommend staying with MOPAR OEM fluids or use another fluid when servicing the differentials and transfer case?

Thanks for any input you can provide.

 

[dsherman26]

I just did these myself on mine. I used Mobil1 75W-90LS in the differentials, though I don't have limited slip. The Mopar transfer case fluid was a bit pricey, I used the Ravenol BW44 fluid from Blauparts, it was $30/quart and you'll need two quarts. Rear differential took about 3 quarts, front was about 1.5 quarts. Park it level, and all three are filled until the fluid runs out of the fill hole. There are some good Youtubes on how to do them. You'll need a 14mm hex socket and an 8mm hex for the differential plugs, the transfer case just takes a 3/8" socket wrench.

 

[corey148]

Thanks man for the info!!

 

[andymax]

Some will say to only use MOPAR, and some will say a good aftermarket brand will do just fine. They're both right. Use what makes you feel good. My $.02 is that I've never used OEM fluid for anything (except one BMW tranny back in 2010) and I've never once had an issue.

 

[rzr6-4]

Park it level,

When I did mine I jacked the rear end up 8-10" to give myself room to work and wondered why it took so much fluid. Oh wait.....

 

[Jeepwalker]

I've said this before...but my local (small family dealership) will sell fluids out of their bulk barrel for a lot less than the Mopar jug. But they only sell a gal at a time. Although I have had them sell me a half gal of power steering fluid (what's that?LOL) to exchanged the fluid. May be worth a call to your small town part's dept guy..and ask. They must have a different number they can run bulk sales under.

IDK the internal finances. Perhaps it helps boost the Service Parts Sales (over normal 'Counter Parts sales'). IDK. Maybe that's a number they get scrutinized on more (??). There are a few small dealerships in our area which do it. But it's definitely cheaper than buying by the jug ..even online. And ya build report with the parts guy.

 

[Atcer2018]

Use the squish packs! I know Valvoline carries fluids in the squish packs so I’ll assume the other big names do too. The squish packs make putting the fluid in the diffs much easier.