C6 rebuild: adding a lower E40D gear info needed
Thread Starter
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Senior User
Joined: Mar 2008
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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.
Posting Guru
Joined: May 2003
Posts: 1,242
Likes: 3
From: Joliet, Illinois
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.
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.
Posting Guru
Joined: May 2003
Posts: 1,242
Likes: 3
From: Joliet, Illinois
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!
Thread Starter
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Senior User
Joined: Mar 2008
Posts: 104
Likes: 0
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.
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.
So were are the 3.08LS gears from?
Or are they custom made?
Posting Guru
Joined: May 2003
Posts: 1,242
Likes: 3
From: Joliet, Illinois
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!
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Senior User
Joined: Mar 2006
Posts: 193
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From: Myrtle Beach, SC
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.
Ford C6 Performance Transmission Parts, C4 Transmission Parts
and for kicks and giggles, here is a breakdown page.
http://www.tcsproducts.com/file_libr...s%20June08.pdf
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.
Ford C6 Performance Transmission Parts, C4 Transmission Parts
and for kicks and giggles, here is a breakdown page.
http://www.tcsproducts.com/file_libr...s%20June08.pdf
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.
Posting Guru
Joined: May 2003
Posts: 1,242
Likes: 3
From: Joliet, Illinois
Here is one where I found 3.08 gears for $325.
Ford 10.25 and 10.5 Ring Gear Pinion Sets and Differential Parts - Drivetrain.com
Ford 10.25 and 10.5 Ring Gear Pinion Sets and Differential Parts - Drivetrain.com
Posting Guru
Joined: May 2003
Posts: 1,242
Likes: 3
From: Joliet, Illinois
My budget is a little tight these days.
