Dana 80/70 Swap????
#16
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From: Eastern Shore of Maryland
#18
If your new rear has a different speed sensor in it, you can just swap it with your old one. It is just one bolt that holds it in. I have a 98 axle in my 94, I had to swap sensors because the plug was different and I don't have any warning lights and the rear ABS works fine.
#19
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From: Eastern Shore of Maryland
I think i need one out of a 2000 or 2001 with the drum breaks cause the 99 and older have didferent stering componets so they had to change the offset of the wheels front and back.
#21
There are a lot of different wheels available, too. I always figured that they had the same backspacing, but come to think of it, I'm sure there are different figures for each wheel. Some are 7 inches wide, some are 8 inches wide. The backspacing would change depending on what set of wheels a person was running. But again, the axle width never changes, unless you get one from a dually.
That axle from the 98 will work just fine. I'm running a 98 Dana 70 in the rear of my 01. ;-)
XLR8R, it's kind of easy to remember this. 2500's with an automatic get a Dana 70 (except for the V8's, which get a 60 rear no matter what, but screw them). 2500's with a manual get the smaller Dana 80.
I forget exactly how the 3500's work. I "think" that the autos get the smaller 80 and the manuals get the bigger 80, but since all 2nd gen 3500's are duallys, then another part of me thinks that they all run the bigger 80. So I'm not totally sure on the 1 tons but maybe somebody else will know fo sho.
#22
The Dana 80 uses an 11 inch ring gear and the Dana 70 uses a 10.5 inch ring gear. The internals aren't all that much bigger, but the housing on the Dana 80 is gigantic. You basically get a D80 center section with D70 tubes. It's not a "true" Dana 80 but it's definitely big enough. Weight ratings remain basically the same, torque input is about the same. Going to a stock D80 is a slight upgrade in strength.
XLR8R, it's kind of easy to remember this. 2500's with an automatic get a Dana 70 (except for the V8's, which get a 60 rear no matter what, but screw them). 2500's with a manual get the smaller Dana 80.
I forget exactly how the 3500's work. I "think" that the autos get the smaller 80 and the manuals get the bigger 80, but since all 2nd gen 3500's are duallys, then another part of me thinks that they all run the bigger 80. So I'm not totally sure on the 1 tons but maybe somebody else will know fo sho.
I forget exactly how the 3500's work. I "think" that the autos get the smaller 80 and the manuals get the bigger 80, but since all 2nd gen 3500's are duallys, then another part of me thinks that they all run the bigger 80. So I'm not totally sure on the 1 tons but maybe somebody else will know fo sho.
At the moment, I'm only concerned with the axle tube size on the 2nd gens.
I know the autos get the D70 tubes, while the manuals get the D80 tubes (also, the V-10 auto gets the D70).
The choice of third member flavors is:
D70 (small tubes, 10.5" ring)
D80 (small tubes, 11" ring)
D80 (big tubes, 11" ring)
When you say the manual 2500s get the "smaller" D80 - which part is small?
It's not the tubes on the trucks I've seen! Are there 3 different tube sizes?
... and does anyone know for sure how the 3500s differ in this?
Thanks!
#24
Yeah, all 80's use the same center chunk, just different tubes. I was saying the smaller 80's have the smaller tubes. The bigger 80's have the man-sized tubes. Those bigger tubes mean it has a higher weight rating, which denotes the difference between a 3/4 and 1 ton. 1 tons have a higher weight rating.
As far as I know, there are only two tube sizes. A quick check for U bolt applications would let us know for sure. I know when I've ordered lifts, you have a "standard" U bolt size and then a larger U bolt size.
It doesn't make sense that a 3/4 ton would have the 1 ton tubes, but then again, we ARE dealing with Dodges here... there is a lot that doesn't make sense.
As far as I know, there are only two tube sizes. A quick check for U bolt applications would let us know for sure. I know when I've ordered lifts, you have a "standard" U bolt size and then a larger U bolt size.
It doesn't make sense that a 3/4 ton would have the 1 ton tubes, but then again, we ARE dealing with Dodges here... there is a lot that doesn't make sense.
#25
...The Dana 80 uses an 11 inch ring gear and the Dana 70 uses a 10.5 inch ring gear. The internals aren't all that much bigger, but the housing on the Dana 80 is gigantic. You basically get a D80 center section with D70 tubes. It's not a "true" Dana 80 but it's definitely big enough. Weight ratings remain basically the same, torque input is about the same. Going to a stock D80 is a slight upgrade in strength.
I had my Dana 70 out this weekend and was pleasently surprised to find a Powr-Lok LSD, which by all reports on the DTR was dropped by Dana in 1998. Appears that only true for the Dana 80's.
After seeing very little wear (125,000 miles) and finding the much prefered Power-Lok limited slip, I no longer have "rear end envy" for those with the 80's.
RJ
#27
i swapped a '95 dana 80 dually into my '01 ...
everything works fine ...
had to move the pass side shock mount though ...
abs and speedo work perfect ...
upgraded to the larger chevy brake cylinders as well ...
everything works fine ...
had to move the pass side shock mount though ...
abs and speedo work perfect ...
upgraded to the larger chevy brake cylinders as well ...
#28
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From: Eastern Shore of Maryland
#29
May be "slight upgrade in strength" ...but giving up a Powr-Lok for a Trac-Lok LSD.
I had my Dana 70 out this weekend and was pleasently surprised to find a Powr-Lok LSD, which by all reports on the DTR was dropped by Dana in 1998. Appears that only true for the Dana 80's.
After seeing very little wear (125,000 miles) and finding the much prefered Power-Lok limited slip, I no longer have "rear end envy" for those with the 80's.
RJ
I had my Dana 70 out this weekend and was pleasently surprised to find a Powr-Lok LSD, which by all reports on the DTR was dropped by Dana in 1998. Appears that only true for the Dana 80's.
After seeing very little wear (125,000 miles) and finding the much prefered Power-Lok limited slip, I no longer have "rear end envy" for those with the 80's.
RJ
#30
nope i got a quad cab dually ...
so it's 1" narrower per side ...
we had a cab/chassis, regular bed dually and srw all laid out on the floor in a row
the c/c was 2" narrower OVERALL than the srw, which was in turn 2" narrower overall than the regular bed dually axle