2016 Ram/ bucking and chucking??
Bought this truck and had a great trip and truck very smooth with Cedar Creek fifth. But after an EFI Live tune that included trany tune and pulling trailer now is very uncomfortable. Previously pu...
Forum Discussion
Just about all 68RFE trans tuning unlocks and locks the torque converter between shifts just like stock. The stock trans was made to shift early for fuel economy and shift smoothly for driver comfort. A smooth shift, however, is just as bad(if not worse) as a harsh shift since a smooth shifts allow the trans clutches so slip a little for a smoother engagement. Along with more clutch wear, this slip causes heat and heat is the number one killer of transmissions.
What is ideal is a firm(not harsh) shift engaging the clutches quickly so that they don't slip. This is why most trans tunning increases max line pressure to about 175 psi ensure the a nice firm shift. More line pressure would be better, but the 68RFE stock valve body will not put out more than that.
Ask any 68RFE rebuilder and they will tell you that the number one failure on 2 the 68RFE and tuning was burning up the overdrive clutches, not input shaft failure. This was even an issue on the updated 2012+ 68RFE and was mainly due to the fact that tuners could not tune the TCM(transmission control module) until recently. By recently mean about 3 years or so. Now that they are able to tune the trans with EFI Live, burning up your overdrive clutches has become more rare if you stay under 450 rwhp and rarely go above that. The trans input shaft can easily handle this much power, but if you go above that often then a fully built trans would be best.
Although, I know many people who deleted their 6.7L's and only ever stay in the improved stock or level 1 tunes which is generally only around 390 at the rear wheels(@450 hp at the crank).
What is ideal is a firm(not harsh) shift engaging the clutches quickly so that they don't slip. This is why most trans tunning increases max line pressure to about 175 psi ensure the a nice firm shift. More line pressure would be better, but the 68RFE stock valve body will not put out more than that.
Ask any 68RFE rebuilder and they will tell you that the number one failure on 2 the 68RFE and tuning was burning up the overdrive clutches, not input shaft failure. This was even an issue on the updated 2012+ 68RFE and was mainly due to the fact that tuners could not tune the TCM(transmission control module) until recently. By recently mean about 3 years or so. Now that they are able to tune the trans with EFI Live, burning up your overdrive clutches has become more rare if you stay under 450 rwhp and rarely go above that. The trans input shaft can easily handle this much power, but if you go above that often then a fully built trans would be best.
Although, I know many people who deleted their 6.7L's and only ever stay in the improved stock or level 1 tunes which is generally only around 390 at the rear wheels(@450 hp at the crank).
