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Old 06-27-2019, 08:18 PM   #1 (permalink)
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Dana 300 - Stronger with Thick Bottom Cover

Do you really get a fair amount of added strength on a Dana 300 when you add a thick aluminum diff cover like the one in the link below? I've thought about a case girdle in the past that ties the output bolt holes to a fabricated steel bottom cover. But if one of these thick covers adds a lot of strength, I'm happy to spend the $100.

FWIW, I haven't had any issues with my Dana 300, but I try to be pretty easy on the throttle and rely more on technical crawling. But, at the end of the day, it does have a V8 and sticky 40s, and I'd rather take measures to prevent a shit show on the trail some day down the line.

https://www.tdsideas.com/store/p5/Da...ver_Plate.html
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Old 06-27-2019, 08:50 PM   #2 (permalink)
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I might be talking out of my ass here, but it seems like a conical insert vs just a cap screw would make it a lot stronger. I know that its 3/4" thick, but if it does want to twist up the only thing stopping it is the clamping force of the bolts.

No matter what I'm sure its better than the stamped cover.
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Old 06-27-2019, 09:27 PM   #3 (permalink)
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I picked up a billet cover for the same reason and have thought about picking up one of these as well.

https://www.hiredgunoffroad.com/prod..._support_plate




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Old 06-27-2019, 09:28 PM   #4 (permalink)
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I should also clarify, I don't need the cover for armor/strength bouncing off of rocks. Floor is cut and tcase clocked up high and flat with a full skid plate. Just don't want to rip my case in pieces from to much torque, etc.
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Old 06-27-2019, 09:31 PM   #5 (permalink)
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I picked up a billet cover for the same reason and have thought about picking up one of these as well.

https://www.hiredgunoffroad.com/prod..._support_plate




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That's pretty cool. Something like that tied/welded to a thick steel bottom cover would be pretty beefy I think, but not sure if they make those for the Dana 300 and/or if that much more strength is actually necessary. I guess it doesn't hurt to go overboard on reinforcement.
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Old 06-27-2019, 09:50 PM   #6 (permalink)
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Thereís a drop down to select the dana 300.


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Old 06-27-2019, 10:10 PM   #7 (permalink)
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I have a dxf file for this and havenít gotten one cut. But Iíd like to do everything I can to polish my 300 as Iíve got big outputs and soon to be 4to1. I have seen pictures on here of the cases splitting in half with low gears.
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Old 06-27-2019, 10:11 PM   #8 (permalink)
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I picked up a billet cover for the same reason and have thought about picking up one of these as well.

https://www.hiredgunoffroad.com/prod..._support_plate




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Thanks for the link.
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Old 06-27-2019, 10:41 PM   #9 (permalink)
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Thereís a drop down to select the dana 300.


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I'm a moron. Thanks for link. That's awesome!
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Old 06-27-2019, 10:44 PM   #10 (permalink)
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I picked up a billet cover for the same reason and have thought about picking up one of these as well.

https://www.hiredgunoffroad.com/prod..._support_plate




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What are your thoughts on tieing this rear support plate to a steel bottom cover via welding or bolts that sandwich together the two pieces?
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Old 06-28-2019, 12:27 AM   #11 (permalink)
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I picked up a billet cover for the same reason and have thought about picking up one of these as well.

https://www.hiredgunoffroad.com/prod..._support_plate

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Buyer beware, this is what the D300 plate looks like on your doorstep.



Vs the pic on the website.

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Old 06-28-2019, 12:40 AM   #12 (permalink)
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Buyer beware, this is what the D300 plate looks like on your doorstep.



Vs the pic on the website.

Good to know. In my case, I actually prefer it without any brackets, because I would be using it to strengthen the case itself and not use it as a cross member mount. Honestly, I would think most people would prefer that as well since who knows how each person wants to clock their own case. Weld on mounts seems to make that aspect easier to setup.
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Old 06-28-2019, 12:50 AM   #13 (permalink)
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Good to know. In my case, I actually prefer it without any brackets, because I would be using it to strengthen the case itself and not use it as a cross member mount. Honestly, I would think most people would prefer that as well since who knows how each person wants to clock their own case. Weld on mounts seems to make that aspect easier to setup.
My issue is the overhang around the case, it no longer packages/fits well. I dont want to modify a part I bought just to make it work.
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Old 06-28-2019, 08:34 AM   #14 (permalink)
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My issue is the overhang around the case, it no longer packages/fits well. I dont want to modify a part I bought just to make it work.
Oh, I see what you're saying now. Yeah, I agree with you and that would probably be an issue for me too.
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Old 06-28-2019, 01:32 PM   #15 (permalink)
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2 minutes with cut off wheel will fix that up
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Old 06-28-2019, 03:51 PM   #16 (permalink)
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Quote:
Originally Posted by RANGERROD View Post
I have a dxf file for this and havenít gotten one cut. But Iíd like to do everything I can to polish my 300 as Iíve got big outputs and soon to be 4to1. I have seen pictures on here of the cases splitting in half with low gears.
I may know someone how could probably burn that out for you.
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Old 06-28-2019, 09:29 PM   #17 (permalink)
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2 minutes with cut off wheel will fix that up
30 seconds with the plasma.
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Old 06-28-2019, 09:54 PM   #18 (permalink)
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2 minutes with cut off wheel will fix that up
If you're going to do that, you might as well just make it yourself. Then at least you won't have that fucking hideous logo in it either.
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Old 06-28-2019, 10:38 PM   #19 (permalink)
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Lots of threads on this. Someone needs to make one similar to the d18 girdle



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If you're going to do that, you might as well just make it yourself. Then at least you won't have that fucking hideous logo in it either.
Bingo.
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Old 06-28-2019, 10:45 PM   #20 (permalink)
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Lots of threads on this. Someone needs to make one similar to the d18 girdle





Bingo.
Shit yeah! I knew I saw a picture of something like that a long time ago. Why doesn't anyone sell that as a WIY kit. Would be super simple. Two flat plates CNCd and sent as separate pieces. Assemble at home and weld it up. Use stock diff cover or whatever.
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Old 06-29-2019, 03:27 PM   #21 (permalink)
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When the cases split, don't they kind of break in half at the center? I've only ever seen one d20 split, but that's what it did. It doesn't seem like that thin little ring on the bottom would do much to prevent that. Maybe that thick billet one first linked would but only because of the insane thickness / beef and not because it's adding material where it's needed most. It seems to me like the BP plate that ties input and front output sides together would be the most effective placement of weight / steel for strength.
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