AODE at Highway Cruise

[final5-0]

Is an AODE locked at a steady cruise going down the highway?

I've always wondered if those gear calculators that tell you
mph and rpm based upon tire size and gear ratio were accurate
for the auto peeps

Grady

 

[red95gtconvert]

The convertor is locked at cruise, my car turns 2300 rpms at 65 mph with an AODE transmission and 373's, not sure about the accuracy of the tables.

 

[HISSIN50]

Mr Grady, I can't offer Wes or Don like precision (or the precision you offer) but one thought that comes to mind............ though a converter is locked (it locks in 3rd and OD as I recall), it can be slipping................ such an event could be throwing off the numbers a little.


The DLing folks can see converter slip as I recall. You'd think a converter at steady-state cruise wouldnt slip but if it's got an issue, a viscous coupling is a slippery animal.

Good question and logic ol' wise one.

 

[gcomfx.com]

I would post up some info. But to be honest, I've changed up my combo so much this past year. I don't remember any of the numbers. I do know going to the 3,200 stall and the 331 my cruising down the highway rpms stayed about the same and I got very surprising gas consumption results. I was pleased at making the same trips and not using much if any more gas. I can't give you mpg as my speedo has never been correct. BUT I just went to 3.55s so I should be able to dial the speedo in now.

 

[Mustangless]

according to the u4p0.bin the converter locks 4th at 35.5

 

[final5-0]

The convertor is locked at cruise, my car turns 2300 rpms at 65 mph with an AODE transmission and 373's, not sure about the accuracy of the tables.

Thanks for the info
even though you live on the wrong side of the Red River

A little local humor all you Yankees most likely can't grasp

As for the accuracy of those little calculator programs .....

I'd think them to be accurate as the ability to arrive at a value
is nothing more than simple math.

Hey ... when I was a kid in high school ........
we had nothing easy like those programs ... so ...........
it was a pencil and piece of paper

I find it interesting how we all ask each other about rpm's at highway
cruise speeds considering most of us use the OEM tach as the
standard of measurement.

Heck Fire ...
Them things have been known to be off by as much as 700 rpm

Another thing is the tire diameter is critical to accuracy here :Word:

btw ... what tire size are you now running?

Grady

 

[Dino Dino Bambino]

Is an AODE locked at a steady cruise going down the highway?
Grady

Yes. I have a 3.73 rear end with stock torque converter, and the torque converter will lock up in overdrive at a true 34mph or 1100rpm. If I only keep very gentle pressure on the gas pedal and accelerate slowly, the torque converter will stay locked up in overdrive from 34mph upwards. If press the gas pedal a little harder, the torque converter unlocks and the rpm increases.
At a steady true 80mph cruise (speedo reading 85) my tach reads 2600rpm.

 

[final5-0]

Well ... I certainly have gotten some info that helps me to relate to an auto
trans in one of our Stangs ... so ... thanks guys

Looks like those programs are valid for an auto trans type of guy if he is
above 34mph and is under a light load driving condition.

Now ... Just one more Q to make an apples to apples comparison between
the aode and T-5 when using one of those programs

With a T-5 the overdrive ratio is .68 to 1.00

What about the overdrive ratio in the aode

Grady

 

[toyman]

With a T-5 the overdrive ratio is .68 to 1.00

What about the overdrive ratio in the aode

Grady

0.67 - 1 Standard Ratio
0.70 - 1 Wide Ratio

 

[final5-0]

0.67 - 1 Standard Ratio
0.70 - 1 Wide Ratio

Thanks Mr. Richard

Grady