In this issue of “keep those trannys rolling,” we are going to look at several “quick fix” tips that should make your day a little bit easier.
Quick Fix Tip #1:
Our first quick fix tip involves the 2018 and later Ford Expeditions equipped with the 10R80 transmission. While working on one of these vehicles, you may experience an intermittent “stuck in park” condition with or without code P27B2 stored in the transmission control module (TCM). This concern is usually caused by the customer shifting to the “PARK” position and then immediately shifting to the “REVERSE” or “DRIVE” position (Figure 1). To correct this concern, it would be recommended to disconnect the battery for 2 minutes. Reconnect the battery and clear the code from the TCM. After the code is cleared from the TCM, instruct the customer to wait at least 5 seconds after shifting into the “PARK” position before shifting into the “DRIVE” or “REVERSE” position. No further repair is recommended for this concern.
Quick Fix Tip #2:
Our second quick fix tip involves the 2018 Ford F-Super Duty built between January 29, 2018, and July 24, 2018, equipped with the 6R140 transmission.
While working on this vehicle, you may experience a howling, fluttering, or whining type of noise while driving in 4th or 6th gears. After further inspection, you have determined that the noise is coming from under the dash near the right side of the steering column. This condition may be caused by noise transferring through the shift cable into the vehicle interior. If you encounter this concern, it would be recommended to replace the shift cable with a new design shift cable (#JC3Z-7E395-C) (Figure 2) to correct this concern.
Quick Fix Tip #3:
Our third quick fix tip involves the 2018 Chevrolet Cruze, Equinox, Malibu, and Traverse equipped with a 9T50 transmission.
While working on these vehicles, you may experience a stuck-in-2nd-gear concern with or without codes P2820 or P2821 (PCS 9 perf) set in the TCM. 
If you encounter one of these vehicles with this concern, it would be recommended to perform the diagnostic routine for the code being set.If the diagnostic routine does not provide a solution, this concern may be caused by a restricted or blocked valve body separator plate orifice. It would be recommended to inspect separator plate orifice #33 for blockage (Figure 3). If orifice #33 is blocked, replace the separator plate and reflash the TCM with the latest calibration update.
Quick Fix Tip #4:
Our fourth quick fix tip involves the 2014-2018 Cadillac ATS and 2016-2018 Chevrolet Camaro equipped with an automatic transmission. While working on these vehicles, you may have trouble shifting out of the park position. This concern may be caused by debris or contamination of the Transmission Shifter Interlock Solenoid. If you encounter this concern, replace the shifter control assembly (Figure 4) to correct this concern.
Quick Fix Tip #5:
Our fifth quick fix tip involves 2015 thru 2019 GM trucks equipped with four-wheel drive (4WD).
While working on these vehicles, you may encounter an intermittent “SERVICE 4 WHEEL DRIVE” displayed on the dash with or without transfer case circuit codes C038D, C039E, C0306, C0321, C0392, C0396, C0398 in the transfer case control module (TCCM). These concerns may be caused by corroded connections due to missing connector seals (Figure 5).
Missing connector seals allow moisture and contaminants to enter the connector ends, causing corrosion and intermittent connections. If you encounter connector seals missing or corroded connections, replace the connector and corresponding component to resolve this concern.
Quick Fix Tip #6:
Our sixth quick fix tip involves the 2017- 2018 Chevrolet Silverado or GMC Sierra trucks equipped with a 6.6D and an LCT1000 transmission. While working on these vehicles, you may experience a malfunction indicator light (MIL) illuminated with code P0700 (TCM MIL req) set in the engine control module (ECM).
However, when checking the TCM for codes, there are no codes listed. This condition may be caused by the TCM experiencing a voltage drop condition, which would allow the transmission codes to be erased from the TCM. If you encounter this concern, it would be recommended to check the TCM power and ground circuits.
It is recommended to install a redundant TCM ground to circuit #451 at pin #65 in the TCM connector (Figure 6).
Quick Fix Tip #7:
Our seventh and final quick fix tip involves 2014-2018 GM vehicles equipped with a 4.3l, 5.3l, or 6.2l engine. While working on these vehicles, you may experience harsh 1-2 and 2-3 shift concerns, with or without codes P0101, P0171, P0172, P0174, or P0175 (MAF) being set in the PCM.
These concerns may be caused by excessive casting flash in the air filter housing near the MAF sensor (Figure 7). This casting flash disrupts the airflow going through the MAF sensor and can create an erratic MAF sensor reading. If you encounter this concern, it would be recommended to replace the air cleaner assembly to correct this concern.
With these quick-fix tips, you should have no problem “keeping those trannys rolling” down the road.
