How much HP can a stock 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).
How does a 68RFE work?
The 68RFE pressure control sys- tem monitors input torque and adjusts the pressure accordingly. The primary stage of the pump works continuously; the second stage is bypassed when demand is low.
How much line pressure can a stock 68RFE handle?
170 PSI
Line pressure is limited in a stock 68RFE to 170 PSI. Unfortunately, this is not high enough to reliably prevent clutch slippage above 400hp.
Are the 68RFE a good transmission?
The 68RFE is a well-designed and strong transmission with gear splits suited to the normal load-moving tasks faced by heavy-duty Ram diesel pickups. But it’s not strong enough to handle the high-output Cummins if one is towing at or near the maximum rating of a Ram 3500 day in and day out.
Has the 68RFE been improved?
In 2019 Chrysler made several changes to the 68RFE. These changes included adding an auxiliary valve body, adding a dedicated TCC control solenoid, and changing the TCC regulator valve. Other changes include modifications to the valve body and the channel casting for controlled reverse and underdrive venting.
Can you tune a 68RFE?
68RFE automatic transmission equipped trucks, you have the option to add transmission tuning. One of the major benefits of having such an electronically controlled transmission are that so many factors, such as converter lock up, line pressure, and shift patterns can be controlled electronically.
Is the 68RFE any good?
Can a 68RFE be reliable?
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 do I know if I have a 68RFE 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.
How bad is the 68RFE transmission?
How hot is too hot for a 68RFE transmission?
So here is a fact you should remember: the ideal maximum transmission temperature is 200°F. For every 20 degrees you go above 200 you reduce the expected life span of the transmission by a factor of 2. Simply put, at 220 degrees you can expect ½ the life span, at 240 a ¼ and at 260 it is reduced to 1/8th.