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Old 10-29-2005, 07:59 PM   #1
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Default Jeep vs. Volvo Dana 30

OK, I only had time to disassemble a reverse-rotation (high pinion) axle, still need to look at a low pinion axle. This one was a 1988 Canadian turbo-diesel Wagoneer, with 4.10 gears. It appears to be just like a 1030 (shims instead of crush sleeve), but with a reverse hypoid and toe/heel orientation. The ring gear is also on the opposite side.
Maybe the low pinion model uses a 1031 style(1" longer pinion, and a crush sleeve)? the parts houses list a crush sleeve model, and a short pinion model, in addition to plain vanilla and reverse.

Jeep on left, 1031 Volvo on right.



Note the larger gears. The 1031 ring gear is on a 1030 carrier to show the similarity.



The housing. It has the ring gear on the left like a Volvo, but the pinion is on the top. The external appearance is identical to a Volvo 1031 (no ribs, no "eye").



Now I need to get the guys at a parts house to measure a few pinions for me.
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Old 10-29-2005, 08:39 PM   #2
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holy beef batman I was expecting the jeep stuff to be 2x the size. way to go volvo.

Nice pics! Thanks!

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Old 10-29-2005, 08:59 PM   #3
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kickass thread. update it as it comes along please.
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Old 10-29-2005, 09:41 PM   #4
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I wish I still had a 1030 ring and pinion. I used them all. If anyone has a set close to me, let me know.
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Old 10-29-2005, 10:09 PM   #5
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can we use most dana 30 lsd or lockers?
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Old 10-30-2005, 04:22 AM   #6
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Quote:
Originally Posted by benflynn
can we use most dana 30 lsd or lockers?
Yes. 1030 is Dana 30, 1031 is Volvo's own beefier model.

The carrier is identical.
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Old 10-30-2005, 10:16 AM   #7
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Right. You can run a 1030 carrier in a 1031 and vice versa.
I am just trying to get real info on what to order for different ratios for the 1030 and the 1031.
I originally didn't understand the theory behind flipping the case and running reverse gears, but now I do. The high pinion gives better driveline angle but reguires a different hypid direction, and reversing the heel and toe gives more strength.

I am hoping to find a cutoff date for a 1031 style in a Jeep (assuming they used that style). I should also be able to make a template to carry in the junkyard, since there is a 1" difference in pinion length.
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Old 10-30-2005, 10:22 AM   #8
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The Jeep pinion dimensions are roughly 7" long, big pinion bearing surface 1.370" (34.4mm) and small pinion bearing surface 1.123" (28.5mm).

1031 pinion dimensions are roughly 7.9" long, 1.436" (36.45mm) and 1.179" (29.9mm).

I did not use a micrometer. I used a dial caliper.
Subtract 1 inch of threads to get the flange position on each.
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Old 10-30-2005, 10:34 AM   #9
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hey, mike, i'm very interested in this option, so please keep looking into it(and post findings of course) as this is way over my head, and i doubt i'd be able to investigate as deep into it as you would

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Old 10-30-2005, 12:25 PM   #10
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The reverse cut gears with high pinion are used on many 4X4 trucks, with that specs the front axle has added resistance, the low pinion and conventional gears has less resistance. This particularity occurs in front drive axles, but for rears the conventional desing is better.

Cool info and pics about the gears!
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Old 10-30-2005, 02:13 PM   #11
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Let me know what you find out because I can get deals on diffs for Jeeps right now. I need to find out what is going to fit in the volvo. I can also extend the deal to you guys.
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Old 10-30-2005, 04:37 PM   #12
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I have 2 possibilities for looking at tomorrow, if the students let me look at their trucks.
Hopefully I will find a different setup.
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Old 10-30-2005, 05:36 PM   #13
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I don´t know for sure if Jeep gears fit into Volvo axle. I supposs it will fit, if it is for a low pinion Dana 30. Then, gears for a CJ5, CJ7, or ZJ Grand Cherokee would fit. Wrong gears will be YJ Wrangler, and XJ Cherokee. The late model TJ Wrangler has a low pinion but maybe it has some variations.
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Old 10-31-2005, 12:57 PM   #14
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That's what I am trying to figure out for sure. So much "I heard" is floating around that we get screwed sometimes. Not too long ago, everyone swore that a Jeep front TrueTrac would not work in a Volvo.
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Old 11-03-2005, 09:57 PM   #15
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I am very interested in this one, guys. Some info I have right now is that all the CJ jeeps (1969-86) use the dana 30 std. The 88-95 XJ/YJ (wrangler and cherokee) have a reverse Dana 30. The ZJ (grand cheroke) uses a Dana 30 that is special to the ZJ. I also noticed the 67-71 Ford Bronco used the dana 30 std. Keep in mind this is all FRONT diff's, not rear.

My catalog says you should be able to find numbers stamped in the axle tube just to the right of the diff. It should be a number that starts with 60 or 61, then 4 digits, then a dash and then either 1 or two digits. This might not be the case in a volvo, but it should be there on Domestics. If somebody finds this number stamped into the rear axle on the volvo, please post. Then I can use that number to find out if I can get us some limited slips or lockers that will fit. And at a discounted price!
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Old 11-04-2005, 04:55 AM   #16
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Quote:
Originally Posted by mikep
I wish I still had a 1030 ring and pinion. I used them all. If anyone has a set close to me, let me know.
Not even close, but is there any special measurement you would like to know, I've got loose 1030 3,54:1 r&p in my hands.
 
Old 11-04-2005, 07:11 AM   #17
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I dont know if this is a question for here... Ive got the torque rods and the subframe covered now, but what about the diff itself? what are the items that go pop in the stock volvo diff, and will the jeep (i asume LSD) take a bit more grunt...or is the diff itself inherently strong. I figured i need an LSD anyway, so its look at stronger options at the same time....sorry if these are stupid questions
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Old 11-04-2005, 07:58 AM   #18
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Griz: you just need a beefier LSD than the stock open carrier. The 1040/1041 will outlast your M90.

And what about the Dana35? Is that a wee bit heftier Dana30? Perhaps 1031?
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Old 11-04-2005, 08:26 AM   #19
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Quote:
Originally Posted by Morley
Griz: you just need a beefier LSD than the stock open carrier. The 1040/1041 will outlast your M90.

And what about the Dana35? Is that a wee bit heftier Dana30? Perhaps 1031?
i happen to know a certain brit with a 1041 doing nothing down the side of his house.......
Is it really that strong with a stronger subframe and torque rods added? enough to stand a nice 16v penta build?
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Old 11-04-2005, 08:52 AM   #20
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Yes. With another carrier, the M90 will die first. The stock locker is worthless imho, won't lock over 40km/h. Get a nice lsd in there, and you'll be happy.

However, this also has to do with tires etc. With high drag radials, nothing will last.
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Old 11-04-2005, 09:05 AM   #21
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Quote:
Originally Posted by Morley
Yes. With another carrier, the M90 will die first. The stock locker is worthless imho, won't lock over 40km/h. Get a nice lsd in there, and you'll be happy.

However, this also has to do with tires etc. With high drag radials, nothing will last.
Ahh right so the 1041 is a waste of time, but it is strong? what do you mad scandinavians do for LSD's in the stock rearend??
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Old 11-04-2005, 09:14 AM   #22
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Everything actually. Some run with stock lsds with overtightened clutch packs, some go with a hella expensive Sellholm lsd, and the rest just welds the sucker up. What are your goals? Drag or turns?
If you're only planning on dragracing, weld it until you can afford something cool, or use the locker as long as it lasts. If you want to turn as well, you need a lsd. Absolutely.

There's a 142 with 700hp gt42 equipped I5 running mid 9s with a 1030 in Sweden.
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Old 11-04-2005, 09:19 AM   #23
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Quote:
Originally Posted by Morley
Yes. With another carrier, the M90 will die first. The stock locker is worthless imho, won't lock over 40km/h. Get a nice lsd in there, and you'll be happy.

However, this also has to do with tires etc. With high drag radials, nothing will last.
You can just tighten the spring for the weight that unlocks the eaton e80. Then it'll hold on longer. I think it works very good. Since it has cluches it's easy on axles as well.
 
Old 11-04-2005, 09:29 AM   #24
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sorry to join this 1041 threadjack, but i think sam and kenny are running a 1041. i know sam said something about shaving off the weights inside the locker so they'd engage at higher speeds. but he did not suggest this method because it's a harsh ride for some reason
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Old 11-04-2005, 09:33 AM   #25
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yep, that can be done. But I seem to remember a few posts on tpc about the stock lockers failing easily. Oh well. Griz should really just throw a 1041 in there and see how long it lasts.

And Mike, we're cluttering up your nice thread. You're welcome to split.
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