Hello and thanks for contacting YourMechanic. The 2007 Dodge Durango could have had a different transmission. I suggest putting on the old flex plate that was on your old engine onto the newer engine. Then the bolts will align up with your transmission torque converter. Also, I highly recommend replacing the rear main seal on the newer engine that you are putting in since you will have access to it, to prevent any prematurely leaks. If you need further assistance with your vehicle, then I recommend getting in touch with a local expert to see if they can guide you through this.
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There will be 3-4 bolts, which go through the flex plate to the torque converter, which hold the torque converter to the engine flywheel/flex plate.
The housing of the torque converter is bolted to the flywheel of the engine, so it turns at whatever speed the engine is running at. The fins that make up the pump of the torque converter are attached to the housing, so they also turn at the same speed as the engine.
Clearance between the flexplate and the converter should be between 1/8″ and 3/16″, any more than this should be shimmed properly with an available shim kit. A good rule of thumb is to use an 1/8th” drill bit as a feeler gauge and make sure it slides in with little clearance.
In a vehicle with an automatic transmission, the torque converter connects the power source to the load. It is usually located between the engine`s flexplate and the transmission.
A torque converter works in three phases: stall, acceleration, and coupling.
The best thing to do to confirm the problem is to test the torque converter. To test the torque converter, you must step on the pedal to the floor and accelerate your engine for up to five seconds. The reading for the revolutions per minute (RPM) will max out at the stall speed.
1. The flywheel nut of a Mazda Rotary should be torqued to approximately 350 ft/lbs of torque. To apply the torque, the flywheel must be locked so that it can not turn, either with a factory-style ring gear brake or with a bar bolted to the flywheel, such as our Flywheel Stopper (PN 22001) shown in the diagram below.
The impeller is connected to the input shaft. The turbine is connected to the output shaft.
It is attached to the end of the engine`s crankshaft where it bolts to the transmission.
Tighten all bolts evenly, ¼ turn at a time in a crisscross pattern until flywheel is completely drawn-up to the crankshaft. Torque all bolts in 3 steps: First to 25 ft/lbs. then 60 ft/lbs. Final torque to: 78 – 80 ft/lbs.
“The size of the converter you need, whether it`s an 8-, 9-, or 10-inch is determined by the load sensitivity of your engine. For example, a motor that makes a lot of torque and makes it at a lower RPM needs a much larger diameter converter because it has a much faster rate of efficiency.
The recommended torque for this type of bolt is 45 ft/ lb.
A Torque Converter Pressure Sensor is a powered sensor that typically has three wires; a 5V+ power wire, a signal wire to the ECU, and a Signal Ground. On this node, the Torque Converter Pressure sensor calibration can be loaded or entered manually.
Fortunately, however, torque converters can be repaired. The repair of the torque converter requires quite a lot of special equipment for cutting it off, measuring, assembling, gluing clutch discs, welding, quality control, and so on.
Larger-diameter converters are usually more efficient and deliver less slippage, while smaller-diameter converters offer more stall speed and more slippage.
The flywheel is found primarily in vehicles that have a manual transmission, whereas the flex plate is found in automatic transmission vehicles. Both of these components are typically heavy, but the flex plate is much thinner and therefore lighter than the flywheel.
A torque converter consists of three major internal components: the pump, turbine, and stator, as well as transmission fluid.
Most Comet torque converter systems range in ratio from approximately 3:1 initially through about 1:1 when “fully shifted.” In a broader sense, the over-all ratio of the drive train also includes the sprocket or gear ratio and is determined by multiplying these separate ratios each times the other.
Automatics based on TC also have planetary gears.
A torque converter uses transmission fluid to convert the engine`s energy into forward momentum, yet since it`s not mechanically connected to the engine, it allows it to idle without moving the vehicle.
Automotive torque converters connect an engine to an automatic transmission and multiply engine torque for increased low-speed acceleration.
Modern torque converters use a lock-up clutch to reduce the energy losses within the coupling fluid by mechanically locking the turbine to the impeller.
The engine`s crankshaft turns the flexplate, which turns the entire torque converter housing. The impeller is welded to the torque converter housing. Therefore, the impeller always rotates at the same speed as the engine when it`s running. The impeller is also known as the pump.
The general equation for bolt load based on applied torque is T = KFiDb where K = torque coefficient. K is a function of the coefficients of friction and collar friction in the joint, and these are based on variables such as surface finish, coatings, and so on.