Transmission will not go into overdrive had ****** checked but pro said that it wasnt the ****** but a sensor. Which one is it and where is it located on the ******?

The erratic jumping in and out of overdrive (O/D) on your 2006 Terrano 3GMR with a 3.2L engine could be caused by a few different issues. Here are some possible causes and fixes:

1. Faulty speed sensor: The speed sensor provides input to the transmission control module (TCM) to determine when to engage overdrive. A faulty sensor can cause the TCM to think the vehicle is going too slow or too fast for overdrive engagement. A mechanic can test the speed sensor and replace it if necessary.
2. Low transmission fluid level: Low transmission fluid level can cause the transmission to shift erratically or not engage overdrive. Check the transmission fluid level and add fluid as necessary. If the fluid level is low, it's important to also check for any leaks that may be causing the fluid loss.
3. Worn or damaged overdrive band: The overdrive band is responsible for engaging and disengaging overdrive. If the band is worn or damaged, it may not engage properly. A mechanic can inspect the overdrive band and replace it if necessary.
4. Transmission control module (TCM) issues: The TCM controls the shifting and engagement of overdrive. If the TCM is malfunctioning, it may not engage overdrive or cause erratic shifting. A mechanic can test the TCM and replace it if necessary.

It's recommended to have a professional mechanic diagnose and repair the issue, as the transmission is a complex and vital component of the vehicle.

I believe it is located driver side about the middle of transmission about 3/4 way up it is an overdrive drum speed sensor. hope this helps look up overdrive drum speed sensor on ebay

on the transmission. 45RFE trans.?
is the engine overheating?



The transmission temperature sensor is mounted on the overdrive/torque converter clutch solenoid assembly and provides input to the TCM. When the temperature sensor reports 30 degrees F or colder, there will be no overdrive, and below 50 degrees F, there will be no torque converter clutch. If the transmission fluid temperature sensor reports an overheating condition (over 260 degrees F) and the transmission is currently in overdrive, the TCM will downshift to third gear. The TCM will also light the LED in the dash-mounted OD off switch until the temperature drops below 230 degrees F. However, the torque converter clutch may still be operational.

Have you tired replacing the Vehicle speed sensor, that is what signals the computer to shift into overdrive. The sensor is located on the side of the transmission case where the speedo cable is.

Inside the transmission.

check for trouble codes, even if a check engine or service engine soon light is not present a code my be present. i have seen faulty throttle positioning sensors cause transmission issues or it could be an internal issue ( i recently had a simular issue with a 200 jeep XJ where the transmission wasnt shifting when it should and it ended up being an worn out adjustment inside the transmission) it could also be your kickdown linkage is just out of adjustment ( the cable that goes from your throttle body to your transmission to let your transmission know to downshift when your putting your foot into the throttle)

Hi.

There are several faults that may result in the problem. Check the throttle position sensor voltage range. If the TPS is bad the transmission control module (TCM) will not know that you are opening the throttle and will not engage higher gears.
Check the solenoid for the gears that are not engaging. Check wiring from TCM to solenoids and wiring between overdrive switch and module. The transmission shift solenoid are located on the transmission in the valve body.
Check the speed sensor (VSS) located in the transmission.
If all that is OK sk the dealer to scan TCM and ECM (main computer) for issues.
Additionally if the box has been replaced with a used one, then the installed transmission may be faulty. Test all the rest first.

Regards.

Ginko

overdrive servo/ solenoid is not operational , either from failed unit or wiring problem
check transmission actuator for operation or adjustment as well

Since you have the die hard, can not kill 4.0, I believe this mated with the 42RE transmission. My understanding It use's a single sensor (located on the overdrive gear case, over the park gear).The 42RE transmissions use a single sensor (located on the overdrive gear case, over the park gear). The 42RE transmissions use a single sensor (located on the overdrive gear case, over the park gear).

Transmission range sensor and neutral safety switch are the same thing (when you go to buy the part). It's at the top of your transmission. You'll see the shifting cable connected to it. Here are the instructions for adjustment:
Shift Control Linkage
The transmission shift linkage adjustments must be performed in the order in which they appear.

Column Shift

Place transaxle range selector lever in (D) (OVERDRIVE) position or D (DRIVE) position on vehicles equipped with a transmission control switch (TCS). A weight of 1.4 kg (3 lb) should be hung on the transaxle range selector lever to ensure the lever is located firmly on the (D) (OVERDRIVE) or D (DRIVE) position on vehicles equipped with a transmission control switch (TCS) detent.

Loosen manual control lever-to-control cable retaining nut.

Move transaxle manual control lever to OVERDRIVE position or D (DRIVE) position on vehicles equipped with a transmission control switch (TCS), second detent from most rearward position.

Tighten retaining nut to 17-23 Nm (13-17 lb-ft). Check operation of transaxle in each transmission range position. Make sure that park mechanism and transmission range (TR) sensor are functioning properly.

Floor Shift

Position transaxle range selector lever in DRIVE position against rearward stop. The floor transaxle range selector lever must be held in the rearward position using a constant force of 1.4 kg (3 lb) while linkage is being adjusted.

Loosen manual control lever-to-control cable retaining nut.

Move transaxle manual control lever to DRIVE position, second detent from most rearward position.

Tighten retaining nut to 17-23 Nm (13-17 lb-ft).

Check operation of transaxle in each transmission range position. Make sure that park mechanism and transmission range (TR) sensor are functioning properly.


To take it off, it's a couple of retaining bolts and a wiring harness.