Differential oil change

[Trojan_Actual]

https://www.jlwranglerforums.com/forum/threads/torque-values-for-jeep-jl-wrangler.17791/

Thanks. Interesting, it doesn't list the M220. Also I guess I DO need to get new fasteners then.

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[ErAcEr]

Thanks. Interesting, it doesn't list the M220. Also I guess I DO need to get new fasteners then.

Your welcome. Isnt the M220 part of the new style that they didnt put a drain plug in and you have to take off the cover. At least I know there was a change in production about 2020-2021 with the new difs stated elsewhre and people just gave the cover a good ugga.

 

[Trojan_Actual]

Your welcome. Isnt the M220 part of the new style that they didnt put a drain plug in and you have to take off the cover. At least I know there was a change in production about 2020-2021 with the new difs stated elsewhre and people just gave the cover a good ugga.

Just did a check and my M220 definitely has drain and fill plugs

 

[FRV]

Just change diff fluids front and rear on our 2021 JLUR V6, 6 speed MT. 45,000 miles. Plenty of overlanding/off road heavily loaded. Significant use of 4WL and light use of lockers. Only use them when I feel they are necessary.

I used the flex bags off Valvoline full synthetic (2) 75W-140 rear with (1) 75W-90 front. Topping off the front with the left over from the rear. Easy change.

No sign of any metal. Some sludge on the magnet cup. Fluid still looked pretty good. Dark for sure but still a little amber.

 

[TrailMax]

Anyone have experience using Loctite PST 592 (https://www.amazon.com/dp/B0002KKTHC?psc=1&ref=ppx_yo2ov_dt_b_product_details)?

It looks like it may work well for differential fill/drain plugs.

 

[roaniecowpony]

Anyone have experience using Loctite PST 592 (https://www.amazon.com/dp/B0002KKTHC?psc=1&ref=ppx_yo2ov_dt_b_product_details)?

It looks like it may work well for differential fill/drain plugs.

I have used this or a similar product on pipe threads years ago. Of course, I've used teflon tapes, but also Titeseal compound as well. They all work. Pick the one you like.

 

[Newbalewb]

Anyone have experience using Loctite PST 592 (https://www.amazon.com/dp/B0002KKTHC?psc=1&ref=ppx_yo2ov_dt_b_product_details)?

It looks like it may work well for differential fill/drain plugs.

I’m partial to this stuff but I’m sure what you linked is fine.

https://a.co/d/ePL1SLi

 

[Rodeoflyer]

I would never use any substance other than maybe a bit of tape on diff plugs. If you torque it correctly it won't leak.

 

[Tncdrew]

Sidenote: (not a Jeep), but the bottom right cover bolt on this Dana M275 doubles as a drain port..... kinda like it! ?

 

[roaniecowpony]

I've had one of my axle plugs weep after removing and replacing it without adding some additional sealant, even though I torqued the hell out of it. The factory plugs or the holes are not the best threads, in my axles.

Use something. There are many products that will work.
Here's Loctite's line up. Confused? Me too. Look for an anti-galling compound that seals instantly, is removeable, and for fuel and oil.
Products | Henkel Adhesives (henkel-adhesives.com)

On the teflon tapes, there are many choices other than the classic thin white tape. I have some Fastseal pink tape that is about 2 or 3 times thicker. There are yellow and blue by different makers for specific applications.

 

[nU7OuxIx]

Anyone have experience using Loctite PST 592 (https://www.amazon.com/dp/B0002KKTHC?psc=1&ref=ppx_yo2ov_dt_b_product_details)?

It looks like it may work well for differential fill/drain plugs.

I don't know if it's 592 I used or the Permatex 59235 one that I used. The problem I have with them is that there's a dry time involved...in particular, I think it was 24 hours before filling. So I have to drain, apply the liquid thread sealant, wait a day, fill, apply the liquid thread sealant and wait another day. You can decrease dry time by using heat, but it still takes a long time to dry.

I don't know if it's just me being ultra paranoid or if you can just fill and use while still wet, as there's not really much pressure in the diff.

 

[roaniecowpony]

If you read through the various compounds that Loctite offers, you'll find some are "instant" seal.

 

[nU7OuxIx]

If you read through the various compounds that Loctite offers, you'll find some are "instant" seal.

The TDS for 592 says for maximum solvent resistance allow the product to cure a minimum of 24 hours. It also says it's immediate low pressure sealing, which I would say the diff is.

Is gear oil a solvent? When I think solvent I think paint thinner and such. Maybe gear oil would be contaminated? I'm not sure. And as others have mentioned, some don't even use tape or dope and say it doesn't leak. So who even knows if gear oil is coming in contact with the threads the dope is on.

At this point, I have no clue what I'm talking about other than reading the very technical tds and trying to make sense out of it.

At the end of the day, it really probably doesn't matter one way or the other and we all just have ocd.

 

[roaniecowpony]

The TDS for 592 says for maximum solvent resistance allow the product to cure a minimum of 24 hours. It also says it's immediate low pressure sealing, which I would say the diff is.

Is gear oil a solvent? When I think solvent I think paint thinner and such. Maybe gear oil would be contaminated? I'm not sure. And as others have mentioned, some don't even use tape or dope and say it doesn't leak. So who even knows if gear oil is coming in contact with the threads the dope is on.

At this point, I have no clue what I'm talking about other than reading the very technical tds and trying to make sense out of it.

At the end of the day, it really probably doesn't matter one way or the other and we all just have ocd.

I would move on to a different sealant that has an "instant" seal. I end up using either teflon tape or Titeseal compound, which is non-hardening. Mainly, because that's always handy. I don't like putting in a pipe plug completely dry. Those things can get difficult to remove if installed dry.

 

[phageghost]

Is gear oil a solvent? When I think solvent I think paint thinner and such.

Gear oil is most definitely a solvent. It's just like mineral spirits but with longer hydrocarbon molecules. Oils in general are great at dissolving other hyrdrophobic (read "oily") substances.

The best solvent for hydrophilic substances is, of course, water.

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