C6 Vs E4od
New User
Joined: Feb 2007
Posts: 1
Likes: 0
Incase you're interested, and you want the parts, and you can find out if they would work, and you live relitivly close, and, and, and...that's alot of ands. I have a 1990 Econoline 350 with a 351w and a E4OD that was rebuilt with all the service pack upgrades a few years ago in my daily work van that I'm looking to sell. If you need all the parts, inc the computer, this would probably supply them. And it's transportable and cheeper than it cost me for the rebuild.
I'm in South Florida. Gosuperbeego@aol.com
I'm in South Florida. Gosuperbeego@aol.com
Senior User
Joined: Dec 2006
Posts: 344
Likes: 3
From: Byron New York
I agree with a gear vendor upgrade. The C6 is a solid transmission but lacked the extra gear. The E4OD was tempermental stock torque was junk and the extra work you would need to make it work probably would not be worth it.
1. E4OD is longer than C6 drive shaft will need to be shortened.
2. Your Vacuum Control Valve would need to be changed to TPS (easy)
3. Wiring the TPS, RPM sensor, Transmission Computer (Harness Change)
4. Hope it all works because your truck harness was never wired for this.
or
1. Gear Vendor price would equal E4OD price. Install according to instructions and just shorten driveshaft.
1. E4OD is longer than C6 drive shaft will need to be shortened.
2. Your Vacuum Control Valve would need to be changed to TPS (easy)
3. Wiring the TPS, RPM sensor, Transmission Computer (Harness Change)
4. Hope it all works because your truck harness was never wired for this.
or
1. Gear Vendor price would equal E4OD price. Install according to instructions and just shorten driveshaft.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
And the other thing is the E4OD behind the gas motor will not bolt up to your diesel engine.
My guess would be you can buy and install a Gear Vendors for less than you can convert to an E4OD tranny till you get all the parts. The Gear Vendors will give you 6 gears instead of 4 with the E4OD.
My guess would be you can buy and install a Gear Vendors for less than you can convert to an E4OD tranny till you get all the parts. The Gear Vendors will give you 6 gears instead of 4 with the E4OD.
Elder User
Joined: Dec 2006
Posts: 559
Likes: 4
From: On a farm.
I recently contemplated this, priced it out and it was about even if I did the work myself. The thing that would have changed my mind was that you have go to a smaller front tank on a 4x4 to run the gear vendors. Cheap so and so that I am is why I decided to just run 3.54:1 ratios and call it close enough.
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Senior User
Joined: Jan 2007
Posts: 167
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yea well I think i'm just gonna change the gears in the rear, the priceof the gear vendors is just way too high and the E4OD I basically wanted to know what it would take and apparently for what it takes isn't worth the tranny anyway... I heard they dont stand up to the C6, so yea the gear vendors is probably the better option but just not worth the money, I think i'm just gonna go w/ 3.73's to get a little more top speed but not lose too much on the take off....
6 gears w/ the gear vendors? that's 3 more gears? are all 3 less than 1:1? what's the final drive of a standard C6?
6 gears w/ the gear vendors? that's 3 more gears? are all 3 less than 1:1? what's the final drive of a standard C6?
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Mountain Pass
Joined: Jun 2004
Posts: 241
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From: Canada
It splits the gears 22%. Works something like a two speed axle. You get 2 ratios below 3rd (direct) and 1 overdrive. When I'm towing with my 89 5 speed a split would be nice going up grades. If I drive at 100 km. I'll drop to much and end up lugging the engine or I have to speed up before getting to the grade to at least maintain some kind of speed. I either have to do 95 Km. or 110. But it is lots of money. Don
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
Gear Vendors gives you an overdrive in each gear, so you wind up with 6 forward gears with a C 6 transmission.
There should be no reason to need a smaller front tank, that is with the US Gear overdrive.
Final drive ratio on the C 6 is 1 to 1.
The Gear Vendors gives you a final ratio of .78 overdrive, very close to the .77 or.76 the ZF 5 gives you.
The E4OD has a final drive ratio of .71 which may be part of the heat problem they have.
There should be no reason to need a smaller front tank, that is with the US Gear overdrive.
Final drive ratio on the C 6 is 1 to 1.
The Gear Vendors gives you a final ratio of .78 overdrive, very close to the .77 or.76 the ZF 5 gives you.
The E4OD has a final drive ratio of .71 which may be part of the heat problem they have.
Last edited by Dave Sponaugle; Feb 10, 2007 at 09:26 AM.
You're right! I got the two units confused.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
I think the US Gear is a nice unit, but I think the installation mods required to make it fit are way to much.
Before I went through all that, I would install a divorced transfer case and a 2 wheel drive transmission mounted Gear Vendors unit between them.
Before I went through all that, I would install a divorced transfer case and a 2 wheel drive transmission mounted Gear Vendors unit between them.
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Senior User
Joined: Jan 2007
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Originally Posted by Don Senkow
It splits the gears 22%. Works something like a two speed axle. You get 2 ratios below 3rd (direct) and 1 overdrive.
Originally Posted by Dave Sponaugle
Gear Vendors gives you an overdrive in each gear, so you wind up with 6 forward gears with a C 6 transmission.
Originally Posted by Dave Sponaugle
I think the US Gear is a nice unit...Before I went through all that, I would install a divorced transfer case and a 2 wheel drive transmission mounted Gear Vendors unit between them.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
The US Gear unit works in overdrive while the truck is in 4 wheel drive.
The Gear Vendors does not, it only works while in two wheel drive.
The US Gear is a huge unit, it also allows spliting gears.
The Gear Vendors unit is small, replaces the tranny tailshaft or the transfer case rear housing and allows splitting gears.
By splitting gears I mean 1st, 1st over, 2nd, 2nd over, 3rd, 3rd over, 4th, 4th over with a four speed. Same thing with a C6, but third over is your top gear.
Both require rear driveshafts be shortened, but the US Gear also requires making the front shafts longer.
The US Gear also needs to have the front fuel tank shortened, the floor pans bent upward, transfer case linkage mods and the list goes on.
Divorced transfer cases have a driveshft between the transmission and transfer case, used in the earlier model 250 and up trucks back in the 70's and earlier.
Married transfer cases bolt right to the back of the transmission, that started in the 80's on the 3/4 ton and up trucks.
www.usgear.com
www.gearvendors.com
You can look at both units, prices, specs and installation requirements.
The Gear Vendors does not, it only works while in two wheel drive.
The US Gear is a huge unit, it also allows spliting gears.
The Gear Vendors unit is small, replaces the tranny tailshaft or the transfer case rear housing and allows splitting gears.
By splitting gears I mean 1st, 1st over, 2nd, 2nd over, 3rd, 3rd over, 4th, 4th over with a four speed. Same thing with a C6, but third over is your top gear.
Both require rear driveshafts be shortened, but the US Gear also requires making the front shafts longer.
The US Gear also needs to have the front fuel tank shortened, the floor pans bent upward, transfer case linkage mods and the list goes on.
Divorced transfer cases have a driveshft between the transmission and transfer case, used in the earlier model 250 and up trucks back in the 70's and earlier.
Married transfer cases bolt right to the back of the transmission, that started in the 80's on the 3/4 ton and up trucks.
www.usgear.com
www.gearvendors.com
You can look at both units, prices, specs and installation requirements.
Cargo Master
Joined: Nov 2003
Posts: 2,585
Likes: 1
From: Duluth, Mn.
Also, US Gear makes 2 different units. You don't want the V2OD. No gear splitting availible. You'll need the Dual Range unit.
"The V2OD is shifted via a shift cable or optional stick shift at moving speeds below 40 mph"
"The V2OD is shifted via a shift cable or optional stick shift at moving speeds below 40 mph"