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Differences between 4R70W and EAOD?

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  #1  
Old 03-26-2011, 05:33 PM
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Differences between 4R70W and EAOD?

Is the EAOD just stronger or are the ratios different as well?
Which is the better all around tranny? Any new info would be great.
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Old 03-26-2011, 06:44 PM
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There is no such thing as an EAOD. Do you mean the E4OD or do you mean the AODE?

The E4OD is a completely different transmission which is larger and much stronger and shares nothing significant.

The 4R70W is a slightly modified and somewhat stronger version of the AODE. The principal difference is the wider spacing of the gear ratios: 2.40/1.47/1.00/0.67 for the AODE vs. 2.84/1.55/1.00/0.70 for the 4R70W.

The wide ratio gears and other 4R70W upgrades can be fitted to an AOD or to an AODE
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Old 03-26-2011, 07:23 PM
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oops, ya i meant the E4OD, that was nothing more than a typo.:o

The reason i ask is my truck has the 4R70W and i was just wondering if the E4OD would of been the better option from the factory. Even though from what i know the E4OD never came with the 302, is that correct?
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Old 03-26-2011, 07:42 PM
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If I remember correctly the switch over to the E40d was in the early 90s, even some 89s (mine not being one of them of course); so yes, 302 did come with the E40d, I could be wrong though.
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Old 03-26-2011, 07:58 PM
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The 302/E4OD combination exists but it is not as common as the 302/AODE-4R70W.
By 1994, the E4OD was a dramatically better box than it was when first introduced in 1989 but still not as good as the 95-up version. As to whether you would have been better off with an E4OD or a 4R70W...who knows?

The 4R70W will take 700 ft-lbs continuous at the input shaft, meaning about 350 ft-lbs from the engine (assuming a 2:1 torque converter). The E4OD is rated at 1000 ft-lbs continuous at the input shaft or about 500 from the engine. In both cases peak numbers can be substantially higher. Neither figure should be a concern with a stock to moderately modified 302. The 4R70W is probably a bit more efficient in terms of drivetrain losses. The E4OD is undoubtedly stronger in its ability to handle the inertia of a heavily loaded truck or a trailer but if you observe the GVWR and trailer ratings for your truck, that should not be an issue either.

BTW the ratios for the E4OD and the 4R70W are very similar to one another. The E40D ratios are: 2.71/1.53/1.00/0.71
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Old 03-27-2011, 12:18 AM
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Read this caption:

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Old 03-27-2011, 05:19 PM
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Good stuff. That pretty much answers my questions.
Thanks Steve, do you have a diagram of the 4R70W as well?
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Old 03-28-2011, 07:31 AM
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If you ordered a 302, you had to pay about 300ish more for an E4OD over a 70w.

Adrianspeeder
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Old 03-28-2011, 12:04 PM
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Old 03-30-2011, 05:19 AM
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Yes booba you are right about the 302/ E4OD. My truck is factory equipped as such. I have owned 2 trucks with the E4OD and 1 with a 4R70W and I prefer the E4 any day!
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Old 03-30-2011, 10:34 AM
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Me too, too bad I have an AOD though.
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