Solid D30 diff cover

[denverd1]

I know a few of us a running solid diff covers. The plug is quite a bit higher on the cover than the stock plug. You guys filling the diff all the way to the plug? seems like a good way to leak about a quart of 90w. will have new seals but wouldn't trust them to hold oil in at that level.


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[4.3LXJ]

They should hold. Make sure the vent at the top is clear

[JeeperEd]

Negative. Every time I filled mine to the top it would push past the axle seals till it got down where it wanted to be and then it'd stop. I had an ARB locker in there too if it matters, but I imagine the result would be the same with or without.

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[bluedragon436]

I've been kind of wondering this as well.. as I'm about to go and purchase gear oil for when I am finally able to get my gears installed, and install the Solid diff covers that have been waiting with the gears to find their way under the XJ!!

[Mudderoy]

I know a few of us a running solid diff covers. The plug is quite a bit higher on the cover than the stock plug. You guys filling the diff all the way to the plug? seems like a good way to leak about a quart of 90w. will have new seals but wouldn't trust them to hold oil in at that level.


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My RuffStuff 8.25 cover has a high hole. I asked them about level. Bottom of the axle tube and on the pinion is what they told me.

[bluedragon436]

My RuffStuff 8.25 cover has a high hole. I asked them about level. Bottom of the axle tube and on the pinion is what they told me.

So you just guesstimate when to stop filling, since you won't be able to see inside to tell when the fluid is @ the bottom the tube?? LOL

[denverd1]

on our HP 30s, I don't think the ideal fill level is very far from the hole. I was going to make a dipstick of sorts to gauge fill level. more later. Thinking a bent hanger will do the trick

[bluedragon436]

on our HP 30s, I don't think the ideal fill level is very far from the hole. I was going to make a dipstick of sorts to gauge fill level. more later. Thinking a bent hanger will do the trick

Read through quite a few similar threads on many other sites for the different Jeep models.. and quite a few people said they contacted Solid to ask the same question.. and they said to just fill to the factory quantities on both axles, and that the fill hole is in a higher location for ease of filling, not to add more oil quantity.

[JeeperEd]

I filled mine till I could just touch it by putting my pinky finger all the way in the hole (scientific I know) and that seemed to work well for me. Was going to make a dip stick but already have a spare pinky finger if necessary so figured why bother.

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[denverd1]

I filled mine till I could just touch it by putting my pinky finger all the way in the hole (scientific I know) and that seemed to work well for me. Was going to make a dip stick but already have a spare pinky finger if necessary so figured why bother.

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This method is definitely a front runner in my mind as a solution to this growing issue in our community.

[denverd1]

https://uploads.tapatalk-cdn.com/20170117/a6133982c099b37a448ebf4ef100c19c.jpg
Here's a solid D30. About 2 inches higher.

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[bluedragon436]

https://uploads.tapatalk-cdn.com/20170117/a6133982c099b37a448ebf4ef100c19c.jpg
Here's a solid D30. About 2 inches higher.

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I can't wait to get mine installed on both ends of my XJ... more so to get my gears installed (and most likely lockers{even if only lunchbox for now})...

[myjeep]

just fill it with the factory level don't worry about the fill hole.

[Mudderoy]

I can't wait to get mine installed on both ends of my XJ... more so to get my gears installed (and most likely lockers{even if only lunchbox for now})...

My Ruffstuff diff cover has more volume than the stock cover. So I had to put more in it. Ruffstuff said the fluid level needs to be up to the bottom of the axle tubes, and to the pinion.

[bluedragon436]

My Ruffstuff diff cover has more volume than the stock cover. So I had to put more in it. Ruffstuff said the fluid level needs to be up to the bottom of the axle tubes, and to the pinion.

Not sure how easy it'll be to see it up to the axle tubes... but either way... plan on having it all done @ a shop, since I don't know how to do gear setup (yet anyways).. You'd think that they'd put the fill holes up to where you can fill to the bottom of them, and have it at the right level..

[4.3LXJ]

One reason for the high fill hole is that many of these diffs are tipped up quite a bit, particularly on the rear of a TJ or short JK. My own has a 13° angle on the pinion

[Mudderoy]

One reason for the high fill hole is that many of these diffs are tipped up quite a bit, particularly on the rear of a TJ or short JK. My own has a 13° angle on the pinion

Ruffstuff didn't say why but they did mention the angle of the pinion and that is why they mention having fluid level on it.

[bluedragon436]

One reason for the high fill hole is that many of these diffs are tipped up quite a bit, particularly on the rear of a TJ or short JK. My own has a 13° angle on the pinion

Ahh that makes sense... wasn't thinking about that part.. Either way can't wait to get my Solid covers on... and know that I have that peace of mind knowing have that added protection for the axles..

[denverd1]

mine took a stinger last time out. glad to have it beefed up a bit. I'll post a pic later

[bluedragon436]

mine took a stinger last time out. glad to have it beefed up a bit. I'll post a pic later

I'm lucky that right now the worse thing I'd hit it on will be a random hidden stump.. or a clump of clay in the mud... lol.. But hoping once the gears are done and a few other small things I will be able to get up to Rausch Creek and a few other actual OHV places that are a bit of a hike from where I live.. and then I will definitely be happy to have the beefed up covers..