WT Upgrade Dana 70 - need advice

[cabody]

I got the bug to upgrade, (finally), so I am going to start at the back of the truck & work forward. When I ordered my truck, I asked for a limited-slip diff. Didn't get it so now I want to put one in. If I remember, it has the 3 series gears. Would it be worthwhile to go to 4:11's? I'll be towing my car(s) around on occasion so the current lower gears will help but I do want the performance of a higher gear. Also, who would I get the diff from, Mopar? Thanks for the advice.

details: 1992 D250 LE Extended Cab Cummins, only mod is an early Banks exhaust.

 

[paccool]

Cabody,
I'm taking the 4. 10:1 gears out of my truck and going back to the stock 3. 54's. The heaviest load I pull is aroud 6000# which is about what you will be pulling. Everyone tells me the 3. 54 ratio is the best for my service.
Just my $. 02

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Stan
93 2WD extended cab, Banks Power Pack, K&N Air Filter, PW Injectors,Auto w/4. 10 rear with limited slip, US Gear Exhaust Brake, 31/2" Exhaust, 5K air bags, Boost/Pyro/Tach Gauges, Green/Silver, new 40-20-40 bucket seats, 149K

[This message has been edited by paccool (edited 02-13-2001). ]

 

[Cummins Cowboy]

yeah i will have to agree. i don't know why anyone would want 4:10's. you want that motor to purr so to speak. The power is best below 2200rpms. maybe 4:10's would work good around town but they would totally suck on the highway and you would loose fuel mileage.

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93 D250 5sp 3. 54 gears sans muffler, ISSPRO tach, K&N filter, needs to be bombed BAD
I would rather be cummin than stroken

 

[drives mopars]

3. 55 r best i de want even a 3. 25 if 1 was

there i carry 4000 lbs

these 5. 9's are grt at low rpms
some day ide do a gear spliter

and go more o/d w/ 4500 in 93

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1993 w350 ex cab, banks,nv 4500 in
open exaust, pw Injectors are in. Big rig flaps,tach in,. Its loud and goes ok, for a 93,Ham radio Call KK6dm
has ability to communicate any where in the world. Headliner shelf
5 antenna's

 

[My 6 Eats V8's Old File]

I think there are 3. 07's available for the dana 70's, that gear came in the early 3 sp auto's.

 

[CrewCabDiesel]

Don't go to 4:10s gears, unless you want to drive around at 55mph on the highway. I am getting to pull out my 4:10 gears and I am going to a 3:54 gear. My Cumminns screams a 65mph and top speed is 78mph @ 2700rpm. Also why spend the money for a Dana 70? The dana 60 is a good rear end, and it might be a better & cheaper option to upgrade the brakes instead. The cheapest I have seen a Dana 70 go for was about $1200, and thats the one I sold #ad
.
Kyle

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1985 DODGE 1 ton Crew Cab(imported from California with no rust) W/8' box converted to 4X4 in 1999. Converted to a non-intercooled 1991 Cummins Turbo diesel & rebuilt 5 speed Getrag in 2000(wife can't drive a stick #ad
. Freshly rebuilt and Balanced Cummins, Rebuilt NP205, Rebuilt Injector pump and tweaked, Matched Injectors, 3" New Mandrel Bent Exhaust,no muffler, Borgeson Steering Shaft, K&N Air Filter, 4:10 gears, limited slip rear end, 16" Goodyear GSA Wranglers and LE Package and a Sony CD Stereo. Next add-on some “Banks” toys ! If you want to know why I did all of this, 2 kids, one on the way and I can't stand Ford and Chevy. Kyle Hoover ,Fruitport, MI.

[This message has been edited by CrewCabDiesel (edited 02-14-2001). ]

 

[CBratten]

I have a rear axle that came out of a 1991
D-250. It is a 3:54 ratio. If you are interested. Boss