how to tell if torque converter is locking up
There is a solenoid in your GM converter that causes the the torque convertor clutch (TCC) to engage and disengage. If you feel that your idle is a bit jumpy and sometimes too low and sometimes too high, it could be a torque converter problem. These are the YJ TF999, and I know they are the … When it’s working properly it might feel like another shift at cruising speed. If RPM's don't go up, it's not locked up. Edge can make a non lock-up that works with the stock input shafts. When I give it gas, the rpms go up but the truck doesn't move much faster, like its slipping. As locking up the converter around town can make a car feel lazy, non-lockup proponents maintain you'll see better initial response at throttle tip … And while the war between not only the … The best way to tell is using AE to monitor TQ slip while you are driving. This is likely your torque converter locking up. Ideally you want the stall to lock up somewhere close to the peak torque of the engine. The impeller pump receives the transmission fluid once it's … This is what leads me to believe it could be torque converter problems. When the ECM signal stops, the solenoid closes the valve and pressure is vented, causing the TCC to … [Re: ChasUno] Joined: … An exception to this theory is if the transmission/converter is equipped with a lock-up feature. The torque converter converts hydraulic pressure within the transmission to mechanical torque, which drives the drive shafts and ultimately, the wheels. If we look at a stall speed rated at 2,200 – 2,700-rpm, the range is meant to cover a variety of engine characteristics with different power curves. Here, you will get a brief idea of what a torque converter is and some of the most common ways to tell if yours is going bad. Torque converters have a one-way clutch that can jam and prevent the converter … To find out if your torque converter is locking up at any time, when the engine is in gear press the gas pedal down. The equivalent location in a manual … 1986 Monte Carlo SS #1052914 - 08/14/17 03:29 AM Re: How to tell when the torque converter locks up? When it's locked up, your transmission should feel like a normal stick shift would, you can just "tell" the transmission is locked to the engine RPM, no torque converter slush/slip when climbing hills, … Typically engines that produce more low-end torque will increase the stall speed. A properly working torque converter is something your car’s transmission needs to function.If there is a problem causing it to malfunction then there are some symptoms that your car will exhibit. The stator should only spin in one direction. A torque converter that is discolored from overheating is faulty and should be replaced. The truck runs really good. The torque converter is one of the most misunderstood – or, perhaps, non-understood – parts of the powertrain. Factory torque converters utilize around 2,000 to 2,200 rpm stall in most diesels, and they're that way for a reason, as most factory ¾-ton pickup-sized engines spin … In this situation, the engine will rev faster than it normally would. Doing so might just end up saving you a lot of money. These first ancestors of the torque converter replaced the clutch on WWI armored vehicles. Most answers I've found over the internet is "by feeling". If choosing a torque converter for use in a street car, you might want to select a torque converter with a stall speed that is below the engine RPM at 70 mph, since this is where your engine will spend a lot of its time. The vibration felt is known as "lockup shudder" and may occur due to a bad engine or transmission as well. The torque converter needs to build up pressure inside of it to move your car forward, and if it doesn’t, it may slip when accelerating. Since torque converters act as intermediaries between two components of the car, they tend to suffer from innate inaccuracies that lead to wasted power on the one hand, and over-torquing on the other. It's in a 1999 1500 with the 4.3l and the 4L60E 4WD. Maintaining efficiency in this way at higher rpm levels helps to reduce fuel … There is no surge at all If I am in park and keep a steady rpm, only in drive. My buddy had a lock up switch on his cummins and I was woundering how to put one on my E4OD. You can add a switch if you want, but it is not needed unless you want the little bit of OD it offers. Is there a tell tale sign when the TC lock up engages/ disengages? How can I tell that my transmission engages the lock up torque converter? The converter is like 26 splines or something vs the 21 or 23 I think for the non lock up. If you look at the arrows in the figure above, you can see that the fluid exits the turbine moving opposite the direction that the pump (and engine) are turning. When I'm cruising down the road at whatever speed in whatever gear,my torque converter doesn't seem to be locking up. Lock-up operation, however, is prohibited when A/T fluid temperature is too low. For instance, "when this situation X occurs, it will unlock", or "when you reach about speed Y, you'll feel a little boost -- that's when it's locking". Lockups serve to set the converter at certain levels of output to maximize efficiency. I am not running a switch and just use it like a normal TF999. When the car is in low, second and reverse gears the converter operates in hydraulic or soft drive. The torque converter converts the power from the engine, ... Nowadays all cars and trucks use a feature called lock-up in the torque converter. By way of fluid coupling, the torque converter transfers the power to the transmission without a clutch or clutch pedal. Rough Idling. This may feel like you’re driving over a series of small humps when in fact, you are only driving slowly on a flat surface. Lockups are an added part inside the torque converter, which works by … This article will take you on a guided tour of the torque converter from front to back (well, technically, we'll go back to … In that same way, if we look at the first "torque converters"-fluid couplings-the rest will be clearer. Rough idling is another common symptom of a bad torque converter. non-lockup is great at the track but not so great for daily driving.. plus like mentioned it builds a lot of heat because the torque converter is ALWAYS slipping unless you are driving at a constant speed for a long period of … Lockup torque converters were added to many newer-model vehicles to help with fuel economy. I run a lock up 94 TF999 in my 91 that originally came with a non lock up. For the grey nomads out there, who tow their whole house behind them while travelling Australia, the Torque Converter Lock-Up Kit is going to be your Automatic Transmission and your wallets best friend. I can tell that it engages gears, and also goes into OD 4th (I can drop it down into 3rd with the shifter). However, knowing just where that point is can be a challenge. If the torque converter … Your car's automatic transmission has a torque converter. Impeller Pump . Stator operation can be checked by inserting a finger into the converter. Another issue might be that the torque converter clutch does not release and stays applied. … What would you guys recommend? This is why a torque converter has a stator. If it spins both ways, or doesn’t spin at all, it has failed and the converter … I am starting to get irritated with not having torque converter lock-up on the highway only, and I believe TC shudder is the cause of it. Below are some of the most … The Stator. The next sign of a torque converter problem is if the vehicle shudders at lower speeds – around 40 miles per hour. Diagnosing torque converter issues could be a challenge, but there are several signs you can look for, and a set of simple tests you can conduct to determine whether the torque converter is causing the problem in your car. Torque Converter Lockup: the point at which the converter in an automatic transmission is the most efficiently providing the most Horsepower (HP) and Torque. I've been in discussion with some members that concluded it sounded like the torque converter locking and unlocking and that was causing the surge. If the fluid were allowed to hit the pump, it would slow the engine down, wasting power. Whether your towing vehicle is a 4, 5 or 6 speed, out on the open road while towing you may find that your transmission is constantly causing your tacho to jump up and down, … '06 Charcoal Chevy 2500 HD Extcab SB LBZ- Predator 120hp Tune, 5" Diamond Eye exhaust, Amsoil Synthetics, Black Moto Metals with 285 Toyo Mud Terrain's, PPE Airbox Mod, 5100 Bilstein shocks, '04 … When the torque converter clutch solenoid valve is activated, the torque converter lockup clutch will engage creating a 1 to 1 RPM ratio between the transmission input shaft and the rotational speed of the torque converter. The stator is called the middleman. A torque converter is a type of fluid coupling which transfers rotating power from a prime mover, like an internal combustion engine, to a rotating driven load.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. However, vibration problems can happen when these torque converters go bad. There could be a lot of things that could cause problems in the torque converter. I have done a full fluid flush and filter change. Advertisement. If the torque converter is locked the RPM's will stay constant until the speed changes no matter how much power you give to the engine. I think I have seen some kind of light you can rig up to tell when its locked up. If the torque converter is not locked to the drive shaft the RPMs will rise quickly. If you don’t feel this shift, there could be a problem with the torque converter or its controls. How to tell if torque converter is locking up. Your RPM's are the same as mine, and that feeling of 5 gears in a 4 speed is the TQ locking up. Lockup converters are but one of a handful of approaches to torque converter functionality, and while none is deemed superior in all applications and situations, manufacturers like ATI and Hughes believe there are some distinct advantages to the lockup, and they’re firmly behind the belief that the lockup converter is the way of the future. When the TCC solenoid receives a signal from the engine control module (ECM), it opens a passage in the valve body and hydraulic fluid applies the TCC. It engages fine when I am on back-roads with no issue. Torque converters from ZF feature optimum hydrodynamic efficiency. 2. This allows the transmission to operate more efficiently at higher RPM. It's the sweet spot tuners know will get that car down the track with consistent HP, and the best ET’s.