• Hello Guest, welcome to the initial stages of our new platform!
    You can find some additional information about where we are in the process of migrating the board and setting up our new software here

    Thank you for being a part of our community!

Jeep vs. Volvo Dana 30

Status
Not open for further replies.
mikep

mikep

Vintage Ride
Joined
May 24, 2003
Location
38? 27' N 75? 29' W
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.

<img src=http://www.pbase.com/mperry/image/51464670.jpg>

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

<img src=http://www.pbase.com/mperry/image/51464675.jpg>

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").

<img src=http://www.pbase.com/mperry/image/51464678.jpg>

Now I need to get the guys at a parts house to measure a few pinions for me.
 
holy beef batman I was expecting the jeep stuff to be 2x the size. way to go volvo.

Nice pics! Thanks!

Mike
 
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.
 
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.
 
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

jason
 
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!
 
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.
 
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.
 
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.
 
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!
 
mikep said:
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.
Click to expand...

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.
 
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 :oops:
Griz
 
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?
 
Morley said:
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?
Click to expand...

i happen to know a certain brit with a 1041 doing nothing down the side of his house.......:badboy:
Is it really that strong with a stronger subframe and torque rods added? enough to stand a nice 16v penta build?
Griz
 
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.
 
Status
Not open for further replies.
Back
Top