I have epica 2007 with automatic transmission gear system. when i applying brake during running car the gear is not engaging again. it becomes free from gear. so i have to swtich off and re-start the engine. then its work. kindly suggest what is problem

Something wrong with the shift lock system maybe. Safety system that won't allow the gear selector to move from park unless the driver is pushing the brake pedal . Do your brake light's work ? Does your caddy have floor or column shift ?
Automatic Transmission Shift Lock Control Description and Operation (Floor Shift)
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
• The automatic transmission shift lock solenoid (serviced as the automatic transmission shift lock actuator), as well as the body control module (BCM) and the engine control module (ECM).The shift lock solenoid is located within the floor shift control assembly with vehicles equipped with floor shift.
• The BCM controls the voltage supply circuit of the shift lock control solenoid. The following conditions must be before the BCM will supply voltage to the shift lock control solenoid.
The BCM controls the voltage to the shift lock control solenoid through the shift lock control solenoid controlled voltage circuit. The following conditions must be met before the BCM will supply voltage to the shift lock solenoid:
• The ignition is in the ON position.
• The ECM sends an input via GMLAN serial data to the BCM indicating the transmission is in the PARK position.
• The BCM determines the brake pedal is applied according the brake pedal position.
Since the shift lock control solenoid is permanently grounded, the BCM supplies voltage to the automatic transmission shift lock control solenoid, mechanically unlocking the shift lever allowing the driver to move the shift lever out of the PARK position as the solenoid energizes. When the brake pedal is not applied, the BCM turns the control voltage output of the shift lock control solenoid OFF, de-energizing the shift lock control solenoid. The de-energized solenoid mechanically locks the shift lever in the PARK position.
During remote start operation, the BCM will de-energize the shift lock control circuit, locking the shift lever in the PARK position.

hi dear,

you must check oil level and filter

Leave your over-drive 'on' during most all driving periods. You should only have to shut it off if you are pulling a heavy load at speeds less than 30mph. Leaving the over-drive off will consume more gas as the transmission is set into a lower gear ratio.

Hi Zahid...Did you fix your problem...I am having the same problem...Want to know how you fixed it...

Can't shift out of park because I've parked on a slight hill and my car has backed up slightly jaming the parking pawl in the automatic transmission after I have shifted into park but before I have set the parking brake. This is a complaint that Ford owners have had for years. Try this proceedure to see if this solves you problem and best of all it's Free. 1st when you park develop the habit of; while still having the foot brake down apply the park brake firmly first and then shift into park and then release the foot brake. Remember it is important to apply park brake with enough force to prevent the vehicle from rolling. What happens is in the rear of an automatic transmission there is a coarse gear that has a lever that engages this larger gear and when you shift into park range this lever goes into one of the spaces in the larger gear and stops the car from rolling. If the car starts to roll it can Jam the lever against the gear and make it difficult to shift out of park. By using the procedure I've outlined it prevents the lever OR Pawl from being jambed into the larger park gear. Try to make this a habit and you shouldn't have anymore problems.

Automatic transmission is a very complicated device and its repair is costly. Most automatic transmissions must be checked with the engine running and warmed up. Also, make sure the car is on a level surface and fully warmed up.

If you not sure how to check the automatic transmission fluid, here is a step-by-step explanation:

Begin by letting the engine idle with the parking brake engaged and your foot on the brake.

Move the gear selector through each gear. This ensures that the fluid is circulating through the pumps, thereby providing you with an accurate reading.

Once you have done this, put the vehicle in park, but leave the brake engaged and the engine running.

The transmission dipstick is located near the rear of the engine. Pull the transmission dipstick out, wipe it clean with a rag, and note the markings on the end of the stick. The usual markings are “FULL” and “ADD 1 PINT”. Inset the dipstick fully and remove it again to take a reading.

If the engine is cool, it should be at the upper end of the “COLD” mark.

Possible fault is within the gear box. it could be that the rpm governor is not reacting accordingly, have you changed the transmission oil? if not replace with the original grade.Also check if the brakes arre jammed by lifting up each wheel and checking for free movement. please respond if this will solve your issue.

need to change gear senstior only and it easy to change

I'd check your motor mounts, sounds like the shifter is just misaligned, they're adjustale