Remove propeller shaft and replace U-Joint.Ĭheck per Service Manual. Tighten loose bolts and replace missing bolts. HARSH ENGAGEMENT (FROM NEUTRAL TO DRIVE OR REVERSE)Īdjust linkage - setting may be too long.Ĭheck engine mount, transmission mount, propeller shaft, rear spring to body bolts, rear control arms, crossmember and axle bolt torque. This portion titled Shorthanded Diagnostics came from a thread on the Cummins Forum written by the user silvertungdemon. Perform the hydraulic and air pressure tests to help determine the probable cause. Unless a malfunction is obvious, such as no drive in D range first gear, do not disassemble the transmission. Practically any condition can be caused by leaking hydraulic circuits or sticking valves. Although road test analysis will help determine the slipping unit, the actual cause of a malfunction usually cannot be determined until hydraulic and air pressure tests are performed. This process of elimination can be used to identify a slipping unit and check operation.
If the transmission will not shift to fourth gear, the control switch, overdrive solenoid or related wiring may also be the problem cause. Similarly, if the direct clutch were to fail, the transmission would lose both reverse gear and overrun braking in 2 position (manual second gear). If slippage occurs during the 3-4 shift or only in fourth gear, the overdrive clutch is slipping. If the transmission does not slip in Reverse, the rear clutch is slipping. By selecting another gear which does not use these clutches, the slipping unit can be determined.įor another example, if the transmission also slips in Reverse, the front clutch is slipping. If the transmission slips in fourth gear but not in third gear, the overdrive clutch is slipping. If the transmission slips in third gear, either the front clutch or the rear clutch is slipping. Similarly, if slippage occurs in any two forward gears, the rear clutch is slipping.Īpplying the same method of analysis, one note that the front and rear clutches are applied simultaneously only in D range third and fourth gear. If slippage occurs in first gear in D and 2 range but not in 1 range, the transmission overrunning clutch is faulty.
However the overdrive direct clutch and overrunning clutch are applied in all ranges except fourth gear. The overdrive clutch is applied only in fourth gear. The rear band is applied in 1 and R range only.
The overrunning clutch is applied in first gear (D, 2 and 1 ranges) only. The rear clutch is applied in all forward ranges (D, 2, 1).
It’s best to have a warm engine and warm fluid when measuring hot marks. Also take note one says “COLD” the other “HOT” this is in reference to your transmission temperature. Check to make sure your fluid is between the two sets of dots, either the lower set or the upper set. So to check your fluid you must part on level ground and idle your truck in NETURAL not Park or any other gear. With the legal aspect out of it here we go.ĬHECK YOUR DAM FLUID! Ha, yes you guessed it most times low/high fluid levels will cause tons of issues, its best to check your fluid first.Ĭhecking your fluid can save you a ton of time and agony especially if you’re following gremlins around. I am not the original author however I have made modifications and additions as well to this article’s contents.
#47RE GOVERNOR PRESSURE SOLENOID SERIES#
This is a general guide and should apply to the 46RE, 47RE, and 48 RE series of transmisisons. and added stuff where I felt it was prudent. I have streamlined and fixed it up made it look nice etic. Hey guys, Pepsi here with a write up that I got from the DT forums.
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