Do they use the same transmissions and OD ratios? Rear ratio is not the full picture.
Transmission ratios are not easily changed. I would say a transmission is essentially designed around the gearing. Even GM's 6l80 and 6l90 has the same gear ratios. The 6l90 is just beefed up more than the 80.
The 4L60 and 4L80 have different gearing. But what does that have to do with anything?
I wasn't sure if Ford developed a trans to be used with the EB or if its the same exact trans as the rest. Not looking for speculation based on what GM has done....
Tow ratings also decrease with higher gears... so maybe Ford couldn't go higher than 3.55 without taking a hit in towing capacity.
Just saying...... its a bit conspiracy theorish to think that every single one of Fords decisions is based around the EB, especially by sacrificing one of their "new" platforms.
It is speculation to assume the ratio's are different jutst to justify your impression of the EB. Jeesh man, it is like you are the only one to allowed have any kind of knowledge about anything. I was simply making the point that either you have a 6l80 (GM) or a 6r80 (ford) or you don't. There are no variations of either one with the exception of the beefed up version. Where the 6l90 is a 6l80 on steroids. I will now bow out to the high and mighty Matt...I have some armchair engineering to do.
By the way the 6r80 gearing is so close to the 6l80 it is scary.
Edited by kdixer, 11 January 2011 - 12:15 PM.