Flywheel to torque converter installation
I am replacing the engine in my vehicle 2006 Chrysler 300C 5.7 Hemi all wheel drive. In the process of installing the engine which came out of an 07 Durango and I have already swapped everything over for some reason the flywheel bolts to talk converter not lining up it is the same flywheel that was on the engine I removed in the torque converter was not taken out so they both matched up before it is about 1/8 of an inch offset where the bolts to the flywheel Ohio then where they install on the flywheel what would be the cause?
My car has 75000 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
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.
DETERMINING TORQUE
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.
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the most relevant questions and answers related to your specific issue
Flywheel to torque converter installation
ANSWER : 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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How do you remove the torque converter bolts off the flywheel? 2005 GMC Envoy Denali
ANSWER : Hello – with the vehicle safely supported to provide clearance underneath – in between the engine oil and transmission pan, there is a large, funnel-shaped aluminum casting (called the bellhousing), that physically mounts the engine to the transmission. At the forward vertical face of the bellhousing (immediately behind the engine oil pan), is an access plate – remove it. The engine flywheel/flex plate is now exposed. 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. Turn the crank from the front crankshaft pulley bolt (CLOCKWISE facing the nose of the engine) a bit, remove a bolt, turn the crank a bit further, remove the next bolt, etc. until all the torque converter bolts are removed. At this point, you should be able to slide the torque converter toward the rear of the vehicle 1/4-1/2" by hand. This will confirm that all bolts are out. You will also be able to rotate the torque converter by hand, without turning the engine. Remember this when re-assembling the engine/transmission, and it becomes to rotate the torque converter to line up the bolt holes in the flex plate. Proceed with the removal of the transmission.
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How much is a flywheel and torque converter? Are those parts worth replacing on my vehicle?
ANSWER : When the starter was diagnosed as bad the flywheel teeth the starter mate to when trying to turn over the engine may have broken or worn teeth and cannot engage each other anymore. Why the torque converter would need replaced I would need to know if the transmission has a shifting problem? I do not see why it would need to be replaced to get the vehicle to crank over. If you do not trust your mechanic word on the needed repairs then have a second opinion check from another mechanic like one from YourMechanic.
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installed tranny tightened it up, had to unbolt & realign torque converter & flywheel worked for 2weeks now have no gears
ANSWER : Hi there. It’s possible that the transmission, torque converter or other components is not properly aligned, or not the especially if you had to adjust the alignment initially. It can also be due to transmission fluid restrictions or pressure issues. Unfortunately, these are all issues that would be beyond our scope of services offered, so your best option is to consult with a transmission specialist to resolve these issues you are experiencing.
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Need torque converter specs because I just replaced the transmission.
ANSWER : I’m not sure what you mean by torque converter specs. Torque converter end-play can be checked with a special tool and a dial indicator. This is done to determine the lateral movement of the turbine and stator. The repair information I have does not list this specification. If you have any doubts about the converter, I recommend replacing it. More often than not, the converter suffers contamination as a result of internal transmission failures and should be replaced anyhow.
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What would happen if the wrong catalytic converter was installed in my 2001 Toyota Camry
ANSWER : Hello. The wrong converter will cause your check engine light to come on and will cause you to not pass emissions. It can also cause some performance and efficiency issues over time. There are specific converters built for all vehicles and that is what needs to be used, especially in California. You need to take it back to the shop that installed the wrong one as it is against emission regulations to install the wrong converter in California.
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Can a flywheel cause damage to a clutch plate?
ANSWER : This cannot be blamed on either party since the flywheel would show a spot that is low or high after it was machined. The flywheel may have what is called a "hot spot" from the last clutch slip which caused the flywheel to get hot, creating a hardened spot that would be hard to machine. At this point, replacing the flywheel and clutch with new parts will definitely solve the issue.
If you’d like a second opinion on this problem, consider enlisting a certified mechanic who can diagnose the shuddering you’re experiencing and perform the necessary checks on these components to find what exactly is at fault.
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Tires installed on rear yesterday tire sensor alert comes up late in the afternoon, can this be an install issue
ANSWER : Hi There,
As you know, your car has sensors at each of the four wheels that monitor the tire pressure at each tire. When these sensors fail, you may notice inaccurate readings as to your tire pressure. In some cases, you may not receive any kind of indication. It may be possible that during the installation the tires did not seal properly causing a small and slow leak which triggered the sensor. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your tire pressure monitoring system.
As you know, your car has sensors at each of the four wheels that monitor the tire pressure at each tire. When these sensors fail, you may notice inaccurate readings as to your tire pressure. In some cases, you may not receive any kind of indication. It may be possible that during the installation the tires did not seal properly causing a small and slow leak which triggered the sensor. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your tire pressure monitoring system.
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