Go ahead and try it by all means. You may like it. You won't know for sure if it's for you unless you want to spend the money to try it. I'm just telling you what the people that have done it have said about it.
I can see how someone might not like it. For a basic street truck it's not much difference.
I see an advantage for a Plow, Large trailer haul'n, or Trailriding truck.
That said, I wouldn't be doing this if I was paying someone to do the work.
1: The early E4OD had an aluminum cage 3 pinion planetary set up just like the C6, but with the different ratio and it had failure issues under a heavy load and if they shifted into reverse and stepped on the gas without waiting for it to get fully into gear.
2: Then they went with a 4 pinion with an aluminum cage and it was better, but there were still some issues.
3: The final fix was a 6 planet with a steel cage. The steel planetary prevented the output shaft from splitting the inner splines like it did on the aluminum planetary.
I've done a bunch of the #2 conversions when the parts were available to me cheap, and one where I purchased the #3 parts from a transmission parts supplier.
The advantages are:
1: You get a better ratio in first and second for towing.
2: More torque capacity with more pinions.
3: Less parasitic HP loss with the Torrington style bearings that replaced the brass thrust washers resulting in slightly better fuel mileage and power delivery.
The difference is not huge, but some feel it's worth it.
__________________
Gray 1991 F250 standard cab, 7.3, E4OD, 3.55:1, stock wheels and tires.
Verified 19 mpg city taking off slow as hell the shutting down at red lights, and with the radiator grill blocked flush, no bed cover, "drag shoot" mirrors on I get 24 mpg at 50 to 55 mph on the freeway empty!
However, with a bed cover, no mirrors and Hydroxy
I wish I had known this when I rebuilt the C6 in my '79. It has 3.55s and the lower 1st and 2nd would have been a big help, I feel like I need to change axle ratios the way it is now.
__________________
2003 F250 FX4 Sport, 6.0L Diesel, TorqShift Auto
- 4" Donahoe Racing springs, Bilstein shocks, 4.30 Yukon gears, Detroit TrueTrac
- 18x10 Diamo 17 Karats, Cooper STT 35x12.50, Off Road Tech winch bumper
- SCT Xcal2 with Spartan tunes, ISSPRO EV2 Gauges (Pyro, Fuel PSI, Boost)
I wish I had known this when I rebuilt the C6 in my '79. It has 3.55s and the lower 1st and 2nd would have been a big help, I feel like I need to change axle ratios the way it is now.
You should be able to find a cheap C6 in a wrecking yard to rebuild.
The big issue with taller gears is in the take off from a dead stop you are experiencing.
An E4OD planetary swap should help.
I had thought on getting 3.08LS gears when I swap in a C6 with 6 pinion planetary gear set and toss out that crap E4OD!
__________________
Gray 1991 F250 standard cab, 7.3, E4OD, 3.55:1, stock wheels and tires.
Verified 19 mpg city taking off slow as hell the shutting down at red lights, and with the radiator grill blocked flush, no bed cover, "drag shoot" mirrors on I get 24 mpg at 50 to 55 mph on the freeway empty!
However, with a bed cover, no mirrors and Hydroxy
1: The early E4OD had an aluminum cage 3 pinion planetary set up just like the C6, but with the different ratio and it had failure issues under a heavy load and if they shifted into reverse and stepped on the gas without waiting for it to get fully into gear.
2: Then they went with a 4 pinion with an aluminum cage and it was better, but there were still some issues.
3: The final fix was a 6 planet with a steel cage. The steel planetary prevented the output shaft from splitting the inner splines like it did on the aluminum planetary.
I've done a bunch of the #2 conversions when the parts were available to me cheap, and one where I purchased the #3 parts from a transmission parts supplier.
The advantages are:
1: You get a better ratio in first and second for towing.
2: More torque capacity with more pinions.
3: Less parasitic HP loss with the Torrington style bearings that replaced the brass thrust washers resulting in slightly better fuel mileage and power delivery.
The difference is not huge, but some feel it's worth it.
archangel, thanks for the info!
So were are the 3.08LS gears from?
Or are they custom made?
So were are the 3.08LS gears from?
Or are they custom made?
Well, ya see, I know this guy.....
I thought I saved the web site but now can't find it.
There is a guy in this forums with the 3.08LS gears in his truck, and he has it with an E4OD!
He was the one who sent me the link to the site that sells them.
And now I can't find it!
__________________
Gray 1991 F250 standard cab, 7.3, E4OD, 3.55:1, stock wheels and tires.
Verified 19 mpg city taking off slow as hell the shutting down at red lights, and with the radiator grill blocked flush, no bed cover, "drag shoot" mirrors on I get 24 mpg at 50 to 55 mph on the freeway empty!
However, with a bed cover, no mirrors and Hydroxy
here is the sight i used to find my parts and then ordered them thru transgo. MUCH CHEAPER!!! scroll about half way dont to #9xx for the wide ratio kit.
p.s. im still working of the pics of cutting the drum for the wider band. i cant remember where i put my camera. but, you can stt the short shell drum for the wide band on the first page i posted.
__________________ FOUR WHEELING - certainly the most fun you will have with your clothes on!!!
__________________
Gray 1991 F250 standard cab, 7.3, E4OD, 3.55:1, stock wheels and tires.
Verified 19 mpg city taking off slow as hell the shutting down at red lights, and with the radiator grill blocked flush, no bed cover, "drag shoot" mirrors on I get 24 mpg at 50 to 55 mph on the freeway empty!
However, with a bed cover, no mirrors and Hydroxy
Your talking axle gears... I though you were still on C6 gear set.
Axles, I know a thing or two about them...
Do you know of a cheaper set of 3.08's for the sterling 10.25?
My budget is a little tight these days.
__________________
Gray 1991 F250 standard cab, 7.3, E4OD, 3.55:1, stock wheels and tires.
Verified 19 mpg city taking off slow as hell the shutting down at red lights, and with the radiator grill blocked flush, no bed cover, "drag shoot" mirrors on I get 24 mpg at 50 to 55 mph on the freeway empty!
However, with a bed cover, no mirrors and Hydroxy
There are some places that sell used parts out there for less than buying the whole thing and tearing it apart only to find one of the parts is unusable.
__________________
Gray 1991 F250 standard cab, 7.3, E4OD, 3.55:1, stock wheels and tires.
Verified 19 mpg city taking off slow as hell the shutting down at red lights, and with the radiator grill blocked flush, no bed cover, "drag shoot" mirrors on I get 24 mpg at 50 to 55 mph on the freeway empty!
However, with a bed cover, no mirrors and Hydroxy
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