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, … Torque Converter Lockup: the point at which the converter in an automatic transmission is the most efficiently providing the most Horsepower (HP) and Torque. And while the war between not only the … Identification . The stator is called the middleman. The truck runs really good. My buddy had a lock up switch on his cummins and I was woundering how to put one on my E4OD. How to tell if torque converter is locking up. Below are some of the most … 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. It's in a 1999 1500 with the 4.3l and the 4L60E 4WD. This allows the transmission to operate more efficiently at higher RPM. There is no surge at all If I am in park and keep a steady rpm, only in drive. An exception to this theory is if the transmission/converter is equipped with a lock-up feature. When I give it gas, the rpms go up but the truck doesn't move much faster, like its slipping. Another issue might be that the torque converter clutch does not release and stays applied. Torque converters have a one-way clutch that can jam and prevent the converter … I can tell that it engages gears, and also goes into OD 4th (I can drop it down into 3rd with the shifter). 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. If you don’t feel this shift, there could be a problem with the torque converter or its controls. Some shop manuals for German cars still refer to the torque converter as the "Foettinger coupling," after its inventor. 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. If RPM's don't go up, it's not locked up. What Causes Issues in Torque Converters . Your RPM's are the same as mine, and that feeling of 5 gears in a 4 speed is the TQ locking up. The torque converter is made up of five parts: 1. I think I have seen some kind of light you can rig up to tell when its locked up. When the TQ locks up, it will drop to between 0 and 5 if it is working normally. 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. 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. 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. Impeller Pump . It engages fine when I am on back-roads with no issue. 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. Most answers I've found over the internet is "by feeling". It's the sweet spot tuners know will get that car down the track with consistent HP, and the best ET’s. The impeller pump receives the transmission fluid once it's … If you know you're in 4 (OD) and the RPM's go up without downshifting when you're climbing a hill, the converter is not locked up. 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 … The torque converter is one of the most misunderstood – or, perhaps, non-understood – parts of the powertrain. 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. 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 … However, knowing just where that point is can be a challenge. Advertisement. I run a lock up 94 TF999 in my 91 that originally came with a non lock up. These are the YJ TF999, and I know they are the … HELP!!!! Each also stressed the idea that the first converter you get may not be the best torque converter, especially if you’re a heads-up racer looking for that last bit of elapsed time to keep up with, or be better than, your competition. The converter is like 26 splines or something vs the 21 or 23 I think for the non lock up. When I drag people I have to hold the brake just enought for it to stay out and when it locks when im trying to back up a trailer. You can add a switch if you want, but it is not needed unless you want the little bit of OD it offers. OK Im getting really sick of my torque converter locking up the second my truck shifts to second then loose power for a few seconds. 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 torque converter converts hydraulic pressure within the transmission to mechanical torque, which drives the drive shafts and ultimately, the wheels. The next sign of a torque converter problem is if the vehicle shudders at lower speeds – around 40 miles per hour. 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. Is there a tell tale sign when the TC lock up engages/ disengages? Anyway, is there any way to tell for … In this situation, the engine will rev faster than it normally would. There could be a lot of things that could cause problems in the torque converter. 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. In that same way, if we look at the first "torque converters"-fluid couplings-the rest will be clearer. To find out if your torque converter is locking up at any time, when the engine is in gear press the gas pedal down. How can I tell that my transmission engages the lock up torque converter? Maintaining efficiency in this way at higher rpm levels helps to reduce fuel … We'll take a closer look at the stator in the next section. Overheating . This is what leads me to believe it could be torque converter problems. Here is a pass with auto..if you listen closely in low gear it just sounds like its struggling or slipping..I know a converter can make or brake this auto deal, I feel it's breaking … It cushions the shifts as they occur and makes the transition of power very smooth as the automatic transmission … A torque converter that is discolored from overheating is faulty and should be replaced. And yes it's a 10" billet race converter with lock up and OD, I happens to tell them what I had and said I felt a low stall would probably work best right, they agreed. When the car is in low, second and reverse gears the converter operates in hydraulic or soft drive. Rough idling is another common symptom of a bad torque converter. 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, … 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. Stator operation can be checked by inserting a finger into the converter. Rough Idling. This is why a torque converter has a stator. This is likely your torque converter locking up. The Stator. If it spins both ways, or doesn’t spin at all, it has failed and the converter … Your car's automatic transmission has a torque converter. The best way to tell is using AE to monitor TQ slip while you are driving. 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. 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. When it’s working properly it might feel like another shift at cruising speed. If the torque converter … The vibration felt is known as "lockup shudder" and may occur due to a bad engine or transmission as well. [Re: ChasUno] Joined: … Doing so might just end up saving you a lot of money. Lockup torque converters were added to many newer-model vehicles to help with fuel economy. If the torque converter is not locked to the drive shaft the RPMs will rise quickly. The equivalent location in a manual … Is there a precise way to know if/when my torque converter is locked up/unlocking on a Nissan Maxima 2002? Ideally you want the stall to lock up somewhere close to the peak torque of the engine. Stator. What would you guys recommend? When they go bad the converter will not be able to lock when going down the highway. 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. These first ancestors of the torque converter replaced the clutch on WWI armored vehicles. If your car is a daily driver or do a lot of interstate driving I would stay lock-up. Torque converters are sealed units; their innards rarely see the light of day, and when they do, they're still pretty hard to figure out! Typically engines that produce more low-end torque will increase the stall speed. If the fluid were allowed to hit the pump, it would slow the engine down, wasting power. Lockups are an added part inside the torque converter, which works by … Edge can make a non lock-up that works with the stock input shafts. I'm going about 2k rpm in OD at about 55-60. This article will take you on a guided tour of the torque converter from front to back (well, technically, we'll go back to … Bad Torque Converter Clutches– Modern torque converters will lock to create a true physical connection between the automatic transmission and the engine. The lock-up clutch, a rigid connection between the impeller and the turbine rotor, ensures that the slippage of the hydrodynamic operation is eliminated and that engine power is transmitted to the drive train without any loss. 1986 Monte Carlo SS #1052914 - 08/14/17 03:29 AM Re: How to tell when the torque converter locks up? Torque converters from ZF feature optimum hydrodynamic efficiency. … When the ECM signal stops, the solenoid closes the valve and pressure is vented, causing the TCC to … 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". '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 … The stator is called the middleman because it serves as the conduit that reverses transmission fluid and sends it back to a turbine impeller. I have done a full fluid flush and filter change. 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. However, vibration problems can happen when these torque converters go bad. Lockups serve to set the converter at certain levels of output to maximize efficiency. 2. When I'm cruising down the road at whatever speed in whatever gear,my torque converter doesn't seem to be locking up. 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. 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 … So, we're going to give everyone a road map to finding … The torque converter converts the power from the engine, ... Nowadays all cars and trucks use a feature called lock-up in the torque converter. 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. Lock-up operation, however, is prohibited when A/T fluid temperature is too low. The stator should only spin in one direction. I am not running a switch and just use it like a normal TF999. By way of fluid coupling, the torque converter transfers the power to the transmission without a clutch or clutch pedal.