The Diesel Garage banner

1 - 20 of 25 Posts

·
Senior Member
Joined
·
2,710 Posts
Discussion Starter #1
which axles come under the 89'-93' dually's ?

D60-D70 ?

D60 -D70HD ?

D70 -D70 ?

D70-D70HD ?

D60-D80 ?

D70-D80 ?

Mike
 

·
Senior Member
Joined
·
572 Posts
89-91.5 with TF727 auto had D70 rear, and D61 front with 3.07 gears. All others had D70 rear, D60 front.
 
  • Like
Reactions: M123KT-450

·
Senior Member
Joined
·
2,710 Posts
Discussion Starter #3
any axles interchange with them ? offing better gearing ?

4.10 / 4.30 / 4.56 / 4.63 ?

Mike
 

·
Senior Member
Joined
·
572 Posts
the regular D60 and D70 can be geared with anything you want. its the D61 in the Non-OD autos that throws a wrench in the works. Just get a truck with FACTORY overdrive and you should be fine. All factory ODs had 3.55, and I have heard of a few 4.11 geared trucks, but they seem to be rarer.
 
  • Like
Reactions: M123KT-450

·
Senior Member
Joined
·
2,710 Posts
Discussion Starter #5 (Edited)

·
Senior Member
Joined
·
572 Posts
factory yes...but if you take it to a driveline shop, ANY set of gears can be added, from like 2. something all the way to 7.something. Look at Yukon, or Superior's website.
 
  • Like
Reactions: M123KT-450

·
Senior Member
Joined
·
2,710 Posts
Discussion Starter #7
Link me up if you can guy. . .

Mike
 

·
Senior Member
Joined
·
2,710 Posts
Discussion Starter #8 (Edited)
Yukon gear's;

Dana-60 4.30;
http://www.yukongear.com/ProductDetails.aspx?ProdID=3710

Dana-80 4.30:
http://www.yukongear.com/ProductDetails.aspx?ProdID=4028

So my options are:
buy a D61 /D70 truck swap out both axles with D60 front & D80 rear.
or
buy a D60 / D70 truck and swap the D70 for a D80 to get 4.30 gear's.

D61-4.11s:
http://www.yukongear.com/PartsList.aspx?SearchMode=Diff&TypeID=3&Type=Dana+Spicer&DiffID=21&DiffName=Dana+Spicer+D61&CatID=10&CatName=Rings+&+Pinions

D60:
http://www.yukongear.com/PartsList.aspx?SearchMode=Diff&TypeID=3&Type=Dana+Spicer&DiffID=20&DiffName=Dana+Spicer+D60&CatID=10&CatName=Rings+&+Pinions

D70:
http://www.yukongear.com/PartsList.aspx?SearchMode=Diff&TypeID=3&Type=Dana+Spicer&DiffID=22&DiffName=Dana+Spicer+D70&CatID=10&CatName=Rings+&+Pinions

D80:
http://www.yukongear.com/PartsList.aspx?SearchMode=Diff&TypeID=3&Type=Dana+Spicer&DiffID=23&DiffName=Dana+Spicer+D80&CatID=10&CatName=Rings+&+Pinions



only gear option from yukon or randy.

other wise using stock factory axles my options are:
D61 n D70 = 4.11's.
or
D60 n D70 = 4.11's or 4.56's.

So i'll have to run a D60 front n D80 rear which will give 8 lug front hubs and 10lug rear hubs.
or
I have to run twin D80's.

how would one go about making a D80 rear into a D80 steer ?

Mike
 

·
Senior Member
Joined
·
572 Posts
Yukon gear's;

how would one go about making a D80 rear into a D80 steer ?

Mike
You would have to cut the knuckle assemblies off of a D60, and weld them on a D80 housing. Or I think Peterson's 4wheeldrive put one in their Ultimate Superduty. I think they got it from Dynatrac. Heres the link
http://www.4wheeloffroad.com
 
  • Like
Reactions: M123KT-450

·
Senior Member
Joined
·
2,710 Posts
Discussion Starter #11

·
Senior Member
Joined
·
572 Posts
are you dead set on 4.30's? 4.10s should be plenty, unless you plan on running reduculously large tires. Even my 3.55s with 35x12.50s do just fine with the manual. Remember, these motors make alot of torque down low, super low gearing is not really needed to get a load moving.
 

·
Senior Member
Joined
·
2,710 Posts
Discussion Starter #13

·
Senior Member
Joined
·
2,710 Posts
Discussion Starter #14
are you dead set on 4.30's? 4.10s should be plenty, unless you plan on running ridiculously large tires. Even my 3.55s with 35x12.50s do just fine with the manual. Remember, these motors make alot of torque down low, super low gearing is not really needed to get a load moving.
I'm planning towing a ridiculously large amount of weight with fairly good sized tires that are heavy.

i want to run 6 tires, six 245/70R19.5's 33.3" x 8.8" carry's [email protected]
the rims are 65LB's and the tires are 75LB's . . .

I want turn those while carrying 15,000LB's behind the truck and be able to maintain 65mph up a steep grade.

the truck i'll be using is equipped with a 160-175hp & 400-420tq 12v-5.9L-CTD, 5spd manual transmission.

I'm going to need some Gear correct ?

Mike
 

·
Senior Member
Joined
·
572 Posts
yes, but the difference in 4.10 and 4.30 will be negligible at that point. The difference is 5% between the two. Stock, with 3.55's these trucks were rated for IIRC 11,000 lbs, And with supporting mods, you should be well within the limits at 15,000.
 

·
Senior Member
Joined
·
2,710 Posts
Discussion Starter #16 (Edited)
I'm sure it "will" tow the load with 4.10's sure, then so could of the 6.5 LOL i don't want to lose 20mph climbing hill's. . .I also don't wanna the last one off the line taking off either. . .

So go with 4.56's ?

Mike
 

·
Senior Member
Joined
·
572 Posts
This motor will be much stronger than the 6.5, I am sure, but, 4.56s will work if you want. Although at 65mph you will be turning 2200 RPM. Not terrible, but not great. Remember, with stock gov springs, it will start to defuel around there.
 
  • Like
Reactions: M123KT-450

·
Senior Member
Joined
·
2,710 Posts
Discussion Starter #18 (Edited)

·
Senior Member
Joined
·
572 Posts
you should be OK then, although gas mileage will suffer, but you probably aren't too worried about it at this stage in the game.
 

·
Senior Member
Joined
·
2,710 Posts
Discussion Starter #20
Mileage ain't much of a concern i now live 1 block around trip from work, i am going to continue to drive the little Comanche is my driver, and this will be a Tow rig only type of unit and shouldn't have to be driven in the winter.

I couldn't make up my mind on weather to go 4.10's or 4.56's then somebody told me about the 4.30's which would be right in between i thought it a good idea. . .

Mike
 
1 - 20 of 25 Posts
Top