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Dana 30 3/8" Differential Cover

Dana 30 3/8
  • Ring is 1/2" and the Cover is 3/8" thick
  • Plate steel cover bent 8 ways
  • Machined absolutely flat for a perfect fit
  • All seams fully welded inside and out

This is our basic differential cover, we see it as the only one worth making. The D30 came in a few different trucks but it primarily came in Jeeps, from the Jeepster in the late 60's, through most of the CJ5, CJ6, & CJ7 years, throughout all of the different Wrangler variations (YJ & TJ), Cherokees (XJ), and of course the Early Broncos. The D30 axle is actually a pretty good little axle if you don't get carried away with too big tires.

One of the questions we get regularly is about the tie rod clearance, it is ~3/4" and it clears all of the D30 axle setups we have encountered.

This Differential cover is a 1 piece Plate steel cap 3/8" (.375") thick bent 8 ways then welded to a 1/2" ring, we had to make it thicker to make enough room for the thickness of the cover, it just happens to make it 30% stronger too! The fill plug is a generous 3/4" ID for easy fill and oil level check. This is arguably the strongest Diff Cover made for a Dana 30 axle.

We manufacture this and all of our covers out of A50 Plate Steel, thats 50,000 PSI Tensile strength. After welding the mounting surface is machined absolutely flat for a perfect fit! This is for a fully welded D30 Differential Cover with fill plug ready to plug and play.
Part Number: 
Shipping Weight: 
12.00 pounds

YES (7.50)

Customer Reviews
Average Customer Review: 5 out of 55 out of 55 out of 55 out of 55 out of 5 12 Reviews
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5 out of 55 out of 55 out of 55 out of 55 out of 5 That Good, 2.21.2016
Reviewer: william holmes (Carson City, NV)

Awesome quality simply the best on the market !!!!!


5 out of 55 out of 55 out of 55 out of 55 out of 5 Best cover for Dana 30, 2.11.2016
Reviewer: Anthony Martinez (Apison, TN)

Super strong cover , perfect for protecting my arb locker investment And really fast shipping.


4 out of 54 out of 54 out of 54 out of 54 out of 5 Awesome cover not so good bolt kit, 2.6.2016
Reviewer: John Davis (Lookout, WV)

The cover super beefy and has first class construction. But... the optional bolt kit is not well thought out. It comes with the plug and 10 grade 8 bolts you could buy anywhere. The problem is you can't torque the bolts and can only tighten them with an open ended wrench due to how the cover is machened.


5 out of 55 out of 55 out of 55 out of 55 out of 5 Heavy Duty!, 1.25.2016
Reviewer: Shannon Darnell (Susanville, CA)

Ordered this 30 and a 44 and basically got them the next day as I'm in Ca. I'm not one to tear my stuff up just because I can. And being a gear head I despise those people. But I can tell you these are the EPITOME of heavy duty. When the world ends there will be 3 things left, Cockroaches, Keith Richards, and these Diff covers.. Pull the trigger on these, you wont be disappointed..


5 out of 55 out of 55 out of 55 out of 55 out of 5 diff cover thats as strong as the rest of your axle housing, 8.16.2015
Reviewer: Darren Casada (Bowling Green, KY)

All material is 3/8" thick, well designed, dome for ring gear is made from one peice of steel, nice welds. My wish list would be to have an option for allen head bolts that are flush mount cone shape.


5 out of 55 out of 55 out of 55 out of 55 out of 5 Best Diff cover on the market, 7.8.2015
Reviewer: Chris Olson (Seattle, WA)

This cover is amazing super beefy welds are superb can't beat the price this cover looks almost indestructable great job Ruff Stuff love your products keep it up


5 out of 55 out of 55 out of 55 out of 55 out of 5 end-all-be-all, 4.15.2015
Reviewer: Donald Blackwell (Williamstown, PA)

There's no comparison with ruffstuff's diff covers. Actually sold my "bombshell" cover when i bought this. Absolutely solid and really a work of art, not to mention no 11-teen-year-old skull on them. Shipping is awesome every time with these guys. Absolutely would buy again, and have for the other toys.


5 out of 55 out of 55 out of 55 out of 55 out of 5 ! !!!BEEFY!!! !, 11.30.2014
Reviewer: Josh Tougas (Boynton Beach, FL)

Heavy duty steel NOT cast aluminum! Installed NO leaks! Best price around (I checked), TOP notch Quality & BEEEFFFYYYY!!!!!!


5 out of 55 out of 55 out of 55 out of 55 out of 5 super strong, 3.14.2014
Reviewer: kurtis june (summerhill, PA)

I am going to get another for my other jeep.


5 out of 55 out of 55 out of 55 out of 55 out of 5 No better Diff Cover, 7.21.2013
Reviewer: John Brune (Stockbridge, MI)

Hand's down the best out there! Price is a bonus.


5 out of 55 out of 55 out of 55 out of 55 out of 5 Tough, 5.25.2013
Reviewer: Ron (Hampstead, MD)

I just installed mine today and this thing is THICK. I doubt I'd dent this like I did my stocker. As the other poster mentioned, the bolts don't fit well due to the thickness of the plate. I ran to the hardware store while the RTV was setting up and picked up some 5/16"x1"-18 bolts and some washers so I'd have more thread in the case.


5 out of 55 out of 55 out of 55 out of 55 out of 5 RuffStuff Dana 30 3/8, 1.6.2012
Reviewer: Tony Muckleroy (Katy, TX)

I ordered my RuffStuff Dana 30 3/8" Differential Cover back in November and I was very impressed with it when I received it. Beautiful welds and so heavy! The box it came in was about gone. But even UPS/USPS (I forget the carrier) couldn't do any damage to this hung of sculpted metal! lol I just got around to installing it last night. Fitment on two of the bolts was a bit tight, so I would recommend a "dry" fitting before you put the RTV on it, you need to know what bolts to start with, and obviously don't tighten any of them until you have them all started. I haven't put it on the dyno, but I'm pretty sure I've gained at least 10 HP from this mod! ;o) Heavy duty, very well made product. I'll be getting one for my Chrysler 8.25 soon! I've done a post with lots of pictures of the installation on xjtalk.com.


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