Aisin AS69RC

Medium Duty Transmission in a Light Duty Package

The Aisin Seiki AS69RC six speed automatic transmission was introduced for the 2013 model year when Ram rolled out the H.O. 6.7L Cummins Turbodiesel, which one can only suspect exhibits performance characteristics that exceed the limitations of the company's 68RFE transmission. Ram claims the strength of the AS69RC is 64% greater than that of the 68RFE. If we assume the 68RFE's maximum engine input torque to be somewhere in the ballpark of the standard Cummins 800 lb-ft peak output, the Aisin alternative would feature an input torque capacity in excess of 1,200 lb-ft. In reality, Chrysler's claims are likely aimed toward the transmissions maximum rated weight carrying capacity, although its input torque should still remain far greater than that of the 68RFE.

The Aisin's deep first gear ratio and overall gear spread is favorable to that of the 68RFE, although in terms of the step percentage between gears (percent change in gear ratio between upshifts) neither transmission holds a clear advantage. The step between 1st and 2nd is significantly steeper in the AS69RC, but smooths out across sequential gear shifts. Keeping in mind that the Aisin is only found behind the High Output Cummins, one could suggest that the extra available engine torque compensates for the 1-2 shifts ratio leap.

Aisin AS69RC Transmission Ratios & Quick Specs

Gear

1st

2nd

3rd

4th

5th

6th

Rev

Ratio

3.75 : 1

2.00 : 1

1.34 : 1

1.00 : 1

0.77 : 1

0.63 : 1

3.54 : 1

% Step

N/A

88%

49%

34%

30%

22%

N/A

Transmission:

AS69RC six speed automatic

Manufacturer:

Aisin Seiki Co., LTD

Applications:

2013 - present Ram 3500 w/ H.O. 6.7L Cummins

Total Ratio Spread:

3.75 - 0.63

Shift Control Type:

Fully electronic

Weight:

350 to 400 lbs

Strength:

64% greater overall strength than 68RFE

PTO:

45 horsepower PTO provisions

Service Intervals:

Recommended transmission fluid replacement at 30,000 mile intervals, recommended transmission filter replacement at 60,000 mile intervals

 

Aisin's AS69RC requires fluid changes at 30,000 mile intervals and fluid + filter replacement at 60,000 mile intervals. In theory, the Aisin will cost you twice as much in fluid than the 68RFE over the course of its life if you follow Chrysler's "severe" service schedule. The Aisin transmission is equipped with PTO provisions, whereas the 68RFE is not. Both the 68RFE and Aisin AS69RC feature a relatively tall 0.63 to 1 second overdrive (6th gear) ratio. The relatively high overdrive ratio yields low rpm cruising speeds, promoting fuel efficiency in low load conditions. The Aisin transmission is clearly overall favorable to the 68RFE, although it is only available in Ram 3500 pickups and only with the High Output Cummins variant.