Nissan RE0F10A CVT Technical Service Bulletins TSBs. TSB NTB10-121 – Hesitation or surge at low speeds – RE0F10A CVT transmission 2007 – 2011 Nissan Altima sedan and coupe Problem – A slight hesitation or surge feeling maybe felt and speeds between 10 and 45 mph, under light acceleration with engine RPMs between 1200 and 2000. JF011E RE0F10A TRANSMISSION PAN FILTER AFTERMARKET FITS NISSAN '07-'15, 31728-1XZ0A.
RE0F10A Transmission - Berkeley Standard RE0F10A Transmission Berkeley Standard completely disassembles each RE0F10A we remanufacture. Every component is cleaned, tested, and repaired or replaced if not to 100% OE specifications. Fits JF011E (RE0F10A) 2007-on General Details JF011E Pump Control Valve from TransGo is an easy drop-in solution for the common complaint of surging or bumping in and out of gear. Information about transmission CVT JF011E (RE0F10A), RE0F06A Automatic transmission CVT JF011E proved itself with the best hand. This reliable automatic gearbox that differs by durability and simplicity of operation to maintain. Also necessary to note its affordable price.
Berkeley Standard completely disassembles each RE0F10A we remanufacture. Every component is cleaned, tested, and repaired or replaced if not to 100% OE specifications. We replace all seals, gaskets, clutches, bushings, and filters. Our remanufacturing facility is state-of-the art and our processes are ISO 9001/TS 16949 certified. Each remanufactured transmission is tested on over 200 parameters on both the component-level and as a complete unit on our testing unit that simulates live operations on a vehicle. We offer a limited 2-year unlimited mileage warranty.
Related Products
By Chris Adams, Diagnostic Trainer
Chris Adams started with Certified Transmission in 1986 as an R&R technician, and currently works as our Diagnostic Trainer. His current duties involve training and advising our retail diagnosticians, as well as assisting in the research and development of our remanufactured products. He is also holds ASE Master and L1 certifications
As CVT transmissions are appearing in our shops with increasing frequency, there still seems to be a degree of hesitance for some shops to take on these jobs. Even if shops do not want to build these units in-house, there are reliable sources for remanufactured units out there that enable them to capture profit on R&R rather than sending a customer down the road to a competitor. Shops must be able to diagnose the correct operation of the unit, and in a nutshell, it is a relatively straightforward process. There are only four solenoids, and two of them are for TCC operation. There are two pressure sensors that are really easy to verify operation (at least after a gauge or pressure transducer is connected), and we will get into those details later in the article. Lastly, there is a stepper motor in place to control the variable ratios of the transmission. The stepper motor is what is new to us transmission guys, and while some stepper motors can get extremely complicated, the ones used in the Nissan/Chrysler applications are not.
The RE0F10A/JF011E transmission utilizes a two-phase unipolar stepper, each with two windings and a center tap for each phase. This type of arrangement allows the magnetic pole to be reversed without reversing the direction of current; the center tap is 'common' and only requires a single transistor for each winding. The motor is driven in what is called a 'full step drive' which means two phases are always on at one time, which results in a higher torque output than the other methods that will have finer control, or resolution. The stepper motor is very reliable by design and could be compared to a brushless DC motor. For our purposes, it is mainly the windings and the bearings that we have to worry about as they must operate within a hostile work environment. The following photos are the stepper motor partially taken apart:
There are a few ways to test a stepper motor on the bench. A simple resistance check is one of them, and since I have never seen the specs posted, we will cover that first. Refer to (figure 3). Measuring between each leg (phase) should produce a result of 15 Ω. If you connect a DMM between pins 1 and 2 you will get 15 Ω (figure 4), and connecting between 1 and 3 and you will see 30 Ω. Pins 2 and 5 are the grounds so it doesn't really matter which side you start from; the second pin in from either side will be a ground. This is just a quick test to make sure you do not have an open or short, and I would always try to run the motor in and out for more of a 'live' test (be sure to use some type of controller; do not just apply a direct 12v to these circuits as these windings use a very fine wire and can heat up quickly).
There are stepper motor controllers that can be purchased that are used only for running the motor in and out, but another option is to build your own if you really like to tinker with stuff. I am not going to go into all the specifics here but there are kits you can buy that utilize either Arduino or Raspberry Pi boards, and a simple web search will turn out tons of results including videos that will show you how to build it. For this application you need a six-wire unipolar stepper motor controller.
Now we'll move on to some cool screenshots from the scope. The top section on each of these screen captures is the main view which has the entire recording in it, and the bottom section is the zoom view which will only show a focused section from the main view. This scope has math functions built-in that allows for measuring the results from any point, either between cursors for a Duty % or Hz reading, or at a specific point for a voltage reading. We are using ten channels, four for the solenoids, four for the stepper motor, and the last two are Pico pressure transducers connected to the primary and secondary pulley pressures. When Certified Transmission prepared for remanufacturing these units, we had to make a reliable, repeatable, dynometer test and that was the driving force for us to gather this information.
Nissan RE0F10A CVT Technical Service Bulletins TSBs. TSB NTB10-121 – Hesitation or surge at low speeds – RE0F10A CVT transmission 2007 – 2011 Nissan Altima sedan and coupe Problem – A slight hesitation or surge feeling maybe felt and speeds between 10 and 45 mph, under light acceleration with engine RPMs between 1200 and 2000. JF011E RE0F10A TRANSMISSION PAN FILTER AFTERMARKET FITS NISSAN '07-'15, 31728-1XZ0A.
RE0F10A Transmission - Berkeley Standard RE0F10A Transmission Berkeley Standard completely disassembles each RE0F10A we remanufacture. Every component is cleaned, tested, and repaired or replaced if not to 100% OE specifications. Fits JF011E (RE0F10A) 2007-on General Details JF011E Pump Control Valve from TransGo is an easy drop-in solution for the common complaint of surging or bumping in and out of gear. Information about transmission CVT JF011E (RE0F10A), RE0F06A Automatic transmission CVT JF011E proved itself with the best hand. This reliable automatic gearbox that differs by durability and simplicity of operation to maintain. Also necessary to note its affordable price.
Berkeley Standard completely disassembles each RE0F10A we remanufacture. Every component is cleaned, tested, and repaired or replaced if not to 100% OE specifications. We replace all seals, gaskets, clutches, bushings, and filters. Our remanufacturing facility is state-of-the art and our processes are ISO 9001/TS 16949 certified. Each remanufactured transmission is tested on over 200 parameters on both the component-level and as a complete unit on our testing unit that simulates live operations on a vehicle. We offer a limited 2-year unlimited mileage warranty.
Related Products
By Chris Adams, Diagnostic Trainer
Chris Adams started with Certified Transmission in 1986 as an R&R technician, and currently works as our Diagnostic Trainer. His current duties involve training and advising our retail diagnosticians, as well as assisting in the research and development of our remanufactured products. He is also holds ASE Master and L1 certifications
As CVT transmissions are appearing in our shops with increasing frequency, there still seems to be a degree of hesitance for some shops to take on these jobs. Even if shops do not want to build these units in-house, there are reliable sources for remanufactured units out there that enable them to capture profit on R&R rather than sending a customer down the road to a competitor. Shops must be able to diagnose the correct operation of the unit, and in a nutshell, it is a relatively straightforward process. There are only four solenoids, and two of them are for TCC operation. There are two pressure sensors that are really easy to verify operation (at least after a gauge or pressure transducer is connected), and we will get into those details later in the article. Lastly, there is a stepper motor in place to control the variable ratios of the transmission. The stepper motor is what is new to us transmission guys, and while some stepper motors can get extremely complicated, the ones used in the Nissan/Chrysler applications are not.
The RE0F10A/JF011E transmission utilizes a two-phase unipolar stepper, each with two windings and a center tap for each phase. This type of arrangement allows the magnetic pole to be reversed without reversing the direction of current; the center tap is 'common' and only requires a single transistor for each winding. The motor is driven in what is called a 'full step drive' which means two phases are always on at one time, which results in a higher torque output than the other methods that will have finer control, or resolution. The stepper motor is very reliable by design and could be compared to a brushless DC motor. For our purposes, it is mainly the windings and the bearings that we have to worry about as they must operate within a hostile work environment. The following photos are the stepper motor partially taken apart:
There are a few ways to test a stepper motor on the bench. A simple resistance check is one of them, and since I have never seen the specs posted, we will cover that first. Refer to (figure 3). Measuring between each leg (phase) should produce a result of 15 Ω. If you connect a DMM between pins 1 and 2 you will get 15 Ω (figure 4), and connecting between 1 and 3 and you will see 30 Ω. Pins 2 and 5 are the grounds so it doesn't really matter which side you start from; the second pin in from either side will be a ground. This is just a quick test to make sure you do not have an open or short, and I would always try to run the motor in and out for more of a 'live' test (be sure to use some type of controller; do not just apply a direct 12v to these circuits as these windings use a very fine wire and can heat up quickly).
There are stepper motor controllers that can be purchased that are used only for running the motor in and out, but another option is to build your own if you really like to tinker with stuff. I am not going to go into all the specifics here but there are kits you can buy that utilize either Arduino or Raspberry Pi boards, and a simple web search will turn out tons of results including videos that will show you how to build it. For this application you need a six-wire unipolar stepper motor controller.
Now we'll move on to some cool screenshots from the scope. The top section on each of these screen captures is the main view which has the entire recording in it, and the bottom section is the zoom view which will only show a focused section from the main view. This scope has math functions built-in that allows for measuring the results from any point, either between cursors for a Duty % or Hz reading, or at a specific point for a voltage reading. We are using ten channels, four for the solenoids, four for the stepper motor, and the last two are Pico pressure transducers connected to the primary and secondary pulley pressures. When Certified Transmission prepared for remanufacturing these units, we had to make a reliable, repeatable, dynometer test and that was the driving force for us to gather this information.
Re0f10a Stepper Motor
The following capture is a 0-70 mph run that was a total of 46 seconds, and you can see how the stepper motor is more active at the start and gradually slows down as the ratio stabilizes. The zoom window only contains two seconds of operation.
Figure 5
The next capture is close to the same recording time as above, but we used the manual shift option where you can see clearly defined ratio changes for each gear selected. The zoom window is only one second of the main window, so the completed ratio change from the theoretical 1-2 gear shift took just a little over .7 seconds to complete.
Jf011e Transmission
Displaying Park, Drive, Drive Stall, Neutral in this capture shows TCC on/off solenoid responding to the gear selector changes, and since the vehicle never moved there is no operation of the stepper motor control. This is where we obtained the pressure specs for the Pri/Sec Pulley pressure. At stall the PC solenoid is running at 15% +duty and the secondary PC solenoid is basically shut off. These readings result in 248psi at the primary pulley, and 410psi at the secondary pulley. At Idle the PC solenoid is running at 45%+ and secondary PC is at 36%+. Corresponding pressures are primary 138psi and secondary 197psi. All three of the PWM solenoids run at 800Hz.
Re0f10a Pdf
Figure 7
A word about pressure testing: BE CAREFUL! Although some of the pressure taps on this unit can be tested with the same equipment that you have used for years, there are others that you can't. I haven't put this unit into failsafe mode to see what would happen, but just normal operation of the Ford CFT30 transmission (as an example) can run close to 900psi of pressure. If you own a Snap-On Verus or the newer Zeus scan tool, they offer a 0-5000psi transducer that is actually reasonably priced and you can look at the pressure on the scope and enables recording pressure events. Make sure you have hoses that can handle these high pressures as 800psi of hot CVT fluid is nothing to mess around with. We have always gone by the 200% rule, so all of our hoses used for CVT testing have a minimum 2000psi burst rating for safety.
Nissan Transmission Re0f10a
These transmissions are getting common in the field. Adequate training, understanding, equipment, and software are the basic requirements for a modern shop to have in order to survive in the latest wave of technology. While these transmissions are certainly more complicated, working on them doesn't have to be.
