The required fluid for the Aisin AS68RC transmission is Exxon JWS3309, or Mobil ATF-3309. Dodge sells as AS68RC fluid. do not use Dexron or Mercon fluids or any other kind of fluid in this transmission or damage will result.

For some Free technical information such as pressure testing transmission,  applied elements and some pinout tests you can perform on the Aisin AS68RC transmission please follow this LINK to view PDF document.

Multiple or random pressure switch codes, may be intermittent or hard faults. these are set because TCM doesn't see switch feedback after shift or during Gear commanded at anytime, we have seen many times a valve body gasket blown out causing these codes. You can pull off pan and sometimes see valve body gasket pieces hanging out the sides of VB.
Also valve body/valve issues such as debris sticking etc. rarely is it the actual switches. can be wiring problems too, such as chaffed or broken wires.
linear solenoids that have failed can cause pressure switch codes. failed mechanically will not create solenoid codes but can create switch codes and missing shifts etc.
 If pan is clean and you've checked circuits between transmission and TCM then likely in valve body area.

Truck will not move forward unless shifted to manual low position, has reverse. the F1 sprague in the rear of the transmission has failed. This can be replaced by removing the rear extension housing and or transfer case, and output shaft components.

Common problem with this transmission can be that the stator shaft has turned in pump cover. can cause no movement, converter overheating, and or slipping in 4th, 5th and 6th gears. A competent machine shop may be able to remove and key the stator back in place or you must purchase a new valve body and pump assemblies from the dealer. If replacing pump cover beware to use pressure regulator valve spacer set up out of old pump cover as valve body is calibrated to these shim set up/regulator valve settings.

There's been a lot of questions regarding this complaint, most with Dodge trucks. we've been finding several causes for this: One can be the TCM needs to be reflashed at dealer.(update software) second: speed sensor wiring issues or the sensors themselves. you may or may not have a code. hard to determine without code unless you Graph the signal to TCM. If you have no codes try reflash of TCM first. third: can be internal damage, clutches etc.

Weve seen TCC slip codes, pressure switch codes, and all kinds of issues including erroneous solenoid codes that can be corrected witha dealer reflash. Somtitmes the dealer will tell you the software is up to dats and doesent need to be reflashed. Have them do it anyways, Overwrite and its been fixing alot of problems. Not all but some.

Transmission shifting very softly, all clutches may be burnt, If adapts reset no change is felt. There may be diesel engine performance enhancement program installed in the ecm. the problem with this is some of these programs did not address the transmission and then the increased horsepower is too much for the transmission and the shift adapts freeze due to the engine enhancements. this will burn up the transmission repeatedly. some of the companies offer way to remove these programs from ecm. if not you will have to replace the engine ecm.

We offer Free transmission diagnostic help for Aisin AS68RC transmissions via E-Mail: Tech Help