Diference Between 4r70w And Aode

WLF · #1 08-02-2003, 02:44 PM

Can anyone tell me the difference between the two. Most places refer to them as one and the same. Is the way they shift different??

Thanks.

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beastie · #2 08-03-2003, 02:10 PM

AOD, AODE, 4R70-W...they are all the same family of transmissions. The AODE is an upgraded AOD with the shifts being controlled (E)lectronically, the 4R70-W has the Wide gear ratio and other than a few simple changes they are the same. My 95 has a 4R70-W and there arent many difference between what comes in the newer trucks, other than upgraded parts and newer versions of the shift solenoids.

KYFordFreak · #3 08-05-2003, 12:01 AM

They are of the same family gene but the internals are slightly different. Here's the breakdown

Gear ratios, the 4R70W has the wide ratio gears whereas the AOD-E doesn't.

4R70W ratios are: (1st) 2.84, (2nd) 1.55, (3rd) 1.00, (OD) .7
AODE ratios are: (1st) 2.40, (2nd) 1.40, (3rd) 1.00, (OD) .67
The 4R70W has a larger diameter slip yoke on the driveshaft.
The 4R70W has a differennt extension housing.
The 4R70W uses better output shaft material.

The newer above 98 or 99 4R70W's got the updated 1-2 accumaltor that had a rubber seal as the old style had a known problem of wear as it was aluminum and caused bore wear. My truck is a very early 97 with the OE tranny and I have 157K miles with no problems yet. Yes it may orm ay not be owrn but still shifts fine. If I ever drop hte pan I will replace this.