Cummins automatic trannys

[ppine]

I had no trouble in 20 years towing with a 4R100 Ford trans behind a 7.3. I drove it 178 k miles before selling it. It had a trans cooler and trans temp gauge. I changed the fluid and watched the temp. Once in awhile towing a trailer I would pull over on steep grades like near Death Valley to let the drivetrain cool off, same with the brakes. the only thing I did not like about was only 4 speeds.

The 68RFE has 6 speeds which are easily controlled with the paddle shifters. The tow/haul is really good. I like it just fine and it much better than the Ford.

 

[ajparry89]

Did anything change between the cummins, either engine or tranny related, between the older 4th gens and say like 2014 and up? I know the gasoline ones got a different tranny after 13. any major differences I should know about with the Cummins? Thanks!

 

[06 Dodge]

Did anything change between the cummins, either engine or tranny related, between the older 4th gens and say like 2014 and up? I know the gasoline ones got a different tranny after 13. any major differences I should know about with the Cummins? Thanks!

Yes more TQ/HP and iirc improvements to the 6 speed transmission, the 2025 are said to be getting an update to engine and a 8 speed transmission

 

[ajparry89]

Yes more TQ/HP and iirc improvements to the 6 speed transmission, the 2025 are said to be getting an update to engine and a 8 speed transmission

When was that change? 2013?