e4od differences between gas and diesel?
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VT Chapter Ldr
Joined: Apr 2004
Posts: 96,155
Likes: 294
From: Orange, Vermont
e4od differences between gas and diesel?
I understand the torque converters are different between gas and diesel but is the transmission itself the same between the gas (302, 351 and 460) and the diesel? Are any versions beefier then others? Thanks for any info.
Postmaster
Joined: Apr 2008
Posts: 4,724
Likes: 4
From: Rogersville, TN
from the bellhousing back they are the same, if you are comparing them from the same year model. did a little research and most of what im finding says as far as getting a beefier stock version, go with a 95 model or up. also, some 5.0's had the 4r70w tranny after about 94. so keep that in mind if you are looking for a used one. here is a list of some updates to the e4od by around 94/95.
Improved (thicker) converter clutch piston, prevents the formation of cracks which relieve fluid pressure from the apply side of the clutch, causing it to slip and even bluing the outside surface of the torque converter in extreme cases. Ensure that your new converter contains an updated OEM or "LuK" brand heavy-duty clutch. This can be difficult, as many torque converter suppliers and remanufacturers may not use this new style of clutch.
Higher displacement front pump provides more fluid capacity for faster engagement of reverse and greater lube flow.
4-pinion overdrive planet and input shaft assemblies replace older 3 and 4 pinion units which tend to develop cracks in the carrier under heavy loads.
Stronger overdrive clutch cylinder snap ring which will not dislodge.
Revised sun gear and rear case bushings provide longer wear life and better lubrication.
Improved (thicker) converter clutch piston, prevents the formation of cracks which relieve fluid pressure from the apply side of the clutch, causing it to slip and even bluing the outside surface of the torque converter in extreme cases. Ensure that your new converter contains an updated OEM or "LuK" brand heavy-duty clutch. This can be difficult, as many torque converter suppliers and remanufacturers may not use this new style of clutch.
Higher displacement front pump provides more fluid capacity for faster engagement of reverse and greater lube flow.
4-pinion overdrive planet and input shaft assemblies replace older 3 and 4 pinion units which tend to develop cracks in the carrier under heavy loads.
Stronger overdrive clutch cylinder snap ring which will not dislodge.
Revised sun gear and rear case bushings provide longer wear life and better lubrication.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,739
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From: SE Florida
The cases are different to mate to different engines. The number of clutch plates varies with engine size, and in some instances smaller engines had two pinion planetary gears while the larger engines had four pinion. All E4ODs had the same gear ratios.
Lead Driver
Joined: May 2007
Posts: 8,608
Likes: 13
From: Belair md
my 97 460 truck only had the cheap aluminum 3 pinion deal in it, i had to upgrade to the sd steel 4 pinion when it let go on me.
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New User
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Yes, the ratios are identical.
I am not sure why they did this, but the gear ratios for a gas e40d and a diesel are identical. The differences lie in the valve body, fluid pump, accumulator spring, and the planatary gears in a diesel are a 6 pin instead of a 5.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,739
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From: SE Florida
Cost. It cost millions of dollars to develop a new gearset.
Butt-Head
Joined: Apr 2004
Posts: 9,462
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From: Reed Point, MT
Besides, the parts are C6-based that have been in production since the 60's. Why reinvent the wheel?
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