Rear Gears
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Elder User
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From: Guymon
What do yall think of these gears?
eBay Motors: FORD/STERLING 10.25 POSI RING & PINION GEARS F250 4X4 (item 300232623563 end time Jun-15-08 16:32:01 PDT)
eBay Motors: FORD/STERLING 10.25 POSI RING & PINION GEARS F250 4X4 (item 300232623563 end time Jun-15-08 16:32:01 PDT)
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Elder User
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From: Guymon
Or would this be a better option?
eBay Motors: Gear Vender Underdrive / Overdrive Unit For Ford E40D (item 190228488629 end time Jun-16-08 10:46:42 PDT)
Also, do this use clutch packs and/or bands and a planitary gear system like a auto tranny or is it like a high low transfer case setup with gears and an electronicly actuated manual shift leaver?
eBay Motors: Gear Vender Underdrive / Overdrive Unit For Ford E40D (item 190228488629 end time Jun-16-08 10:46:42 PDT)
Also, do this use clutch packs and/or bands and a planitary gear system like a auto tranny or is it like a high low transfer case setup with gears and an electronicly actuated manual shift leaver?
Postmaster
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From: Sweet Home, OR
Dodge had front Dana 60s in the '89-'91 diesels with 3:08 gears ---BUT--- they have the pumpkin on the passengers side and the Dodge Dana 60 is not as good as the Ford's. Technically you could use a Dodge divorced NP205 and a 3:08 front Dana 60 out of a Dodge and make it work but you'd be better off with the Ford stuff and 3:54s.
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From: Sweet Home, OR
I think it is a Dana 70. I didn't think of that until you mentioned it.
Lead Driver
Joined: Nov 2003
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From: Campbell River, B.C.
Kinda yes kinda no.
Dodge had front Dana 60s in the '89-'91 diesels ---BUT--- they have the pumpkin on the passengers side and the Dodge Dana 60 is not as good as the Ford's. Technically you could use a Dodge divorced NP205 and a 3:08 front Dana 60 out of a Dodge and make it work but you'd be better off with the Ford stuff and 3:54s.
Dodge had front Dana 60s in the '89-'91 diesels ---BUT--- they have the pumpkin on the passengers side and the Dodge Dana 60 is not as good as the Ford's. Technically you could use a Dodge divorced NP205 and a 3:08 front Dana 60 out of a Dodge and make it work but you'd be better off with the Ford stuff and 3:54s.
Postmaster
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From: Sweet Home, OR
I am aware of the dodge front ends that were offered because of the low RPM limit of the cummins. But as you say, the pumpkin is on the wrong side, and the ford axle is better with the gears cut specially for front end duty and better ground clearance. Hacking a low pinion D61 housing into ford D60 axle assembly might be the solution, but that gets really messy. I know I don't have the time or guts to attempt something like that.......
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From: Ocean Park WA
I'm going to with the Gear Venders Overdrive for my 250 since that's the only one for 4 wheel drives. If I had a 2 wheel drive I'd get the US Gear overdrive unit. My 350 had the underdrive unit for towing and I loved it. Using a splitter gives you a lot more gear options. I had the better milage of the 3.54 gear ratio and the added torque of 4.11 gears with just a push of the button. A little practice and you wouldn't even hear or feel it shift.
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Post Fiend
Joined: Nov 2003
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From: Nutter Fort, WV
97 out of 100 duallies have Sterling axles in the rear.
Since it could be either an under drive or over drive, I wonder which one it is?
The options are either under/direct or direct/over.
Since it could be either an under drive or over drive, I wonder which one it is?
The options are either under/direct or direct/over.
Lead Driver
Joined: Nov 2003
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From: Campbell River, B.C.
This seems to be the common reason people THINK the 3:08 gears were used. It was actually because Dodge didn't have an O.D. automatic transmission for the Cummins, only the 727 Torqueflite. The RPM potential of the motor really had nothing to do with it as even the first generation, non-intercooled motors were governed for 3000-3200 RPM. I just don't know anyone who wants to listen to a Cummins scream at 3K going down the highway. The good low-end torque and the torque converter easily made up for the high gear ratio. It actually made a very driveable/liveable combo.
I see in my owners manual that 3.08s are listed as an option for the diesel F/E-250 diesels, but to date I have never seen one from factory. Catfish says he had one, but thats all I ever heard of an OEM 6.9 with "airplane gears". Stupid chevy 350 diesel......that was probably why everyone thought that you needed 4.10s behind a diesel by the time the 6.9 came out
Post Fiend
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From: Nutter Fort, WV
Back when we had the local Ford dealership, I can't count the people that ordered the 6.9 with 4.10 gears.
Then a week later they were wishing they had 3.55 gears becuase they never had to shift out of high gear once they were moving.
Then a week later they were wishing they had 3.55 gears becuase they never had to shift out of high gear once they were moving.
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I'm going to with the Gear Venders Overdrive for my 250 since that's the only one for 4 wheel drives. If I had a 2 wheel drive I'd get the US Gear overdrive unit. My 350 had the underdrive unit for towing and I loved it. Using a splitter gives you a lot more gear options. I had the better milage of the 3.54 gear ratio and the added torque of 4.11 gears with just a push of the button. A little practice and you wouldn't even hear or feel it shift.
I can not speak for the others but I had and still have a Gear Vendors over/under unit. Now it sits in a box in the back room. It will not let you run double overdrive. It has a built in safety to prevent it. As for it being the " the only one for 4 wheel drives" it mounts on the back output shaft for the rear wheels only, and it will not work in 4 wheel drive. Their web site says you should not have a need to split shift or for a overdrive if you are in 4WD unless you are racing. All of the GV units are pretty much the same ( Ford, Chevy, Dodge, Motorhomes ) they just have interchangeable mounting adapters. The one I have is like a heavy duty overdrive for 2WD E4OD towing. Because you should not use the factory OD while towing. It has the same final ratio as the factory OD.
I would go for a gear swap. It would be way cheaper in the long run.
Post Fiend
Joined: Nov 2003
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From: Nutter Fort, WV
According to the Gear Vendors site, double overdrive with the E4OD gives you a .55 final drive trans ratio.
Gear Vendors Under/Overdrive Ford Truck-Car-Van 2-Wheel Drive 4-Speed and 5-Speed Automatics.
Also listed for the ZF 5 and ZF 6 transmissions.
Also listed for the 4R100 and Torqueshift transmissions.
Gear Vendors Under/Overdrive Ford Truck-Car-Van 2-Wheel Drive 4-Speed and 5-Speed Automatics.
Also listed for the ZF 5 and ZF 6 transmissions.
Also listed for the 4R100 and Torqueshift transmissions.
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It was originaly mounted in a 94 2WD F250 I got for towing. It was installed 2 months before I got the truck. When I sold the truck I removed it. GV said the only thing I needed was a $400 adapter for the 4WD E4OD (thats what I have now). All ready to do it when I ask about double overdrive and final drive ratio they said no double OD, and the controler would lock out the factory OD when the GV unit was in operation, and the final drive ratio would be almost that of stock. No great improvement so why do it.
I was just looking at the GV site first time in a few years, and they now say they will do double OD. Back in the day that was not the case. Besure I will call them on Monday! That was the main reason I have not installed it in my current truck.
Sorry for the incorrect first posting. I stand corrected it will do double OD or at least the new model will. It will not work in 4WD unless the you have a divorced transfercase and the GV unit is mounted in front of the transfercase.
Goes to show. You can learn something new everday, and I may have just found a use for a 9 year old 40 lbs. very expensive door stop.
I was just looking at the GV site first time in a few years, and they now say they will do double OD. Back in the day that was not the case. Besure I will call them on Monday! That was the main reason I have not installed it in my current truck.
Sorry for the incorrect first posting. I stand corrected it will do double OD or at least the new model will. It will not work in 4WD unless the you have a divorced transfercase and the GV unit is mounted in front of the transfercase.
Goes to show. You can learn something new everday, and I may have just found a use for a 9 year old 40 lbs. very expensive door stop.