![]() ![]() It is caused by design factors, such as number of cylinder, number of propeller blades, engine speed, and number of gear teeth. Gear clatter under load may occur at a specific RPM. Such influences are beyond the control and responsibility of transmission manufacturers.Ī distinction should be made between gear clatter under load and idle gear clatter: The possibility of tooth flanks to separate is due to the backlash required for compensating tolerances and thermal expansion to ensure the operational safety of the transmission.Īs a rule, gear clatter is the result of an unfavorable interaction of individual components, such as engine, couplings, gears, propeller shaft, and propeller. This is caused by irregularities of torque and of rotation. ![]() Gear clatter occurs when the tooth flanks in the transmission separate and hit each other again in actual operation. » to this answer Do I need to replace my oil cooler or drive plate? Transmissions last the longest at steady cruising speeds and with no high-rpm shifting. Avoid idling for great lengths of time as this puts extra wear on the transmission. Noise may be more apparent at idle, since the engine firing impulses are further apart. With a bad drive plate, even the slightest variation in firing impulses from the engine can cause transmission noise. This plate absorbs the engine's firing impulses, is the last link between the engine and transmission, and connects directly to the transmission's input splines. If the engine is tuned up and running well, the drive/damper plate may be the cause of noise. If compression is not within 10% in all cylinders, uneven firing impulses may cause the transmission to make backlash noise. A compression check is a must before putting any blame on the transmission. Our rebuild processġ All seals, gaskets, damaged and worn parts replaced.Ģ All parts are thoroughly cleaned and transmission is assembled.ģ Transmission is then installed on test stand to check for leaks, lube and clutch pressure.Ĥ Transmission is then painted and ready for installation.Transmission noise is most commonly caused by a poorly running engine or a worn out drive/damper plate. This can save you money in extra labor and marina fees. We are professionals and can remove most transmissions from vessel without removing the engine or hauling boat out of the water as many service facilities will tell you. This is why you should give us a call to determine whether your transmission even needs to be removed from the boat. Many problems can be repaired in the boat depending on the model transmission you have and the problem you are encountering. This ensures that the transmission is ready to be installed in the boat with no problems after installation. The transmission is then tested on our test stand to check for leaks, clutch pressure and lube pressure. All seals gaskets and clutches are replaced as well as any other parts that may be damaged. When we rebuild a transmission it is completely disassembled and every part inspected for wear and damage. ![]() Whether you have a ZF, twin disc or velvet drive you can be assured that Authority Marine will take care of your problem in the most cost effective, timely and professional manner possible. We specialize in marine transmissions for pleasure and commercial craft. If your transmission is making rattling noises or you are encountering problems such as slow engagement or slippage give us a call before major damage to your transmission occurs. Our factory trained technicians will arrive in a fully equipped service truck, ready to accurately diagnose and repair any transmission related problems you may have. Authority marine will respond promptly to any destination in the tri state area. ![]()
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