The 68RFE is not nearly as robust as the Aisin in any way, shape, or form. … While the Aisin’s overall ratio spread is 3.75-0.63, the 68RFE’s is only 3.23-. 0.63. The difference is the Aisin has a much deeper First (3.75:1) and Second (2.0:1) to maximize the 6.7L’s torque delivery for more low-end pulling power.
Which is better 68RFE or Aisin?
In stock form the Aisin is slightly better than the 68RFE but when you start adding power neither one of them hold up very well and both are expesnive to build, the Aisin being even more expensive than the 68RFE.
Is the Aisin transmission any good?
The Aisin is an excellent and very heavy duty transmission. The torque converter is the tightest I’ve ever experienced. The lockup strategy is flawless and makes the trans very efficient, it NEVER gets hot under any circumstances. It has nice low 1st gear and a good OD ratio.
How long do Aisin transmissions last?
Anywhere between 1 mile and 1 million miles is a safe bet. There are so many factors….it’s just not possible to name an expected service life.
How much HP can the Aisin transmission handle?
Aisin: The Aisin 6-speed automatic is one of the transmissions available with Ram’s 6.7L Cummins turbo-diesel engine. This engine produces up to 400 hp and 1,000 lb-ft of clean-diesel torque. With the Aisin transmission, it can tow 31,000 pounds.
Is the RAM 68RFE a good transmission?
Overview of the 68RFE:
Despite all of the impending doom the 68RFE and it’s abysmal valve body bring forth, it is a powerfully reliable transmission after being properly built. But, in stock form, it cannot hold much more than factory power.
How much power can the 68RFE handle?
With quality transmission control module (TCM) tuning, the stock 68RFE can support 500rwhp and 1,000 lb-ft or more, but it won’t survive boosted, four-wheel drive launches for very long—and maybe not even once if the Low/Reverse sprag explodes (which is common).
Who uses Aisin transmission?
Aisin AW supplies automatic transmissions to 55 automotive manufacturers around the world, virtually every major OEM. These include General Motors, Ford, Jeep, Mitsubishi, Nissan, Saab, VW, Volvo, Hyundai, MINI among others.
What year did RAM use Aisin transmission?
The Ram started using the Aisin Seiki six-speed AS68RC automatic transmission in 2007, as an option on all of its diesel-powered chassis cab trucks; the transmission was rated at 750 lb-ft of input torque capacity.
Why does the 68RFE fail?
The most common failure point of the 68RFE is the Overdrive clutches. … Because of their lack of mass, the 68RFE clutches have a very low tolerance to heat and do not dissipate it well. Once these clutches heat up past a certain temperature, they begin to distort.
What is 68RFE transmission?
The 68RFE transmission is the big brother to the 45/545RFE transmission. The RFE platform was originally designed by Chrysler and was introduced in 1999 with the debut of the new Jeep Grand Cherokee. … The RFE design was mostly noted in the new design to have 3 planetary sets for a 4-speed transmission in the 45RFE.
How can you tell the difference between a 68RFE and Aisin transmission?
All you have to do is open up the hood: If your yellow dipstick handle is on the right side of your engine (the driver’s side), you’re likely looking at a vehicle with an Aisin transmission. If your dipstick is just to the left of your engine, you’re most likely dealing with the 68RFE.
Why is the Allison transmission so good?
Unlike manual and automated manual transmissions (AMTs), Allison Automatics have no power interrupts during shift changes. They make the best use of the engine’s horsepower and torque by delivering more of it to the wheels. … This not only saves time and money, it also provides maximum protection for the transmission.