6.7 Automatic Transmission

[craiggo]

Hoping someone can clarifiy a qustion for me. I've read where the new 6sp auto on the 2500/2300 trucks is built by Dodge whereas the 6sp auto on the Chassis cabs is a different trans built by Aisin? Is there any truth to this or is it the same trans?



Thanks in advance for clarification.



Craig

 

[AKaiser]

Yes, they are two different transmissions. The 68RFE is a Dodge transmission, and the Aisin 6 speed which goes on the C&C are different. The Aisin will have PTO capability, which the 68RFE will not. The 68RFE is also about $1000 cheaper than the over $2000 Aisin model

 

[Caveman]

Yes, they are two different transmissions. The 68RFE is a Dodge transmission, and the Aisin 6 speed which goes on the C&C are different. The Aisin will have PTO capability, which the 68RFE will not. The 68RFE is also about $1000 cheaper than the over $2000 Aisin model

The 68RFE is actually a Daimler/Mercedes engineered transmission.

 

[george]

I wonder how the two compare

 

[EMD-Run8]

Very similar ratios. I think the Aisin has a lower 1st gear and of course the PTO capability.

 

[jcarey]

I believe the following are accurate:



Automatic Transmissions Ratios



68RFE ratios:

1 - 3. 231:1

2 - 1. 837:1

3 - 1. 410:1

4 - 1. 000:1

5 - 0. 816:1

6 - 0. 625:1

R - 4. 444:1



Aisin ratios:

1 - 3. 74:1

2 - 1. 96:1

3 - 1. 34:1

4 - 1. 00:1

5 - 0. 77:1

6 - 0. 63:1

R - 3. 54:1

 

[AKaiser]

The 68RFE is actually a Daimler/Mercedes engineered transmission.

As I understand it, it's based on the 545RFE. I don't think that's a German design. As I understand it, the 545RFE is a spinoff of the 727 design.



Chrysler Automatic Transmission Legacy and Application