Complete valve body with solenoids installed for the Nissan/Infiniti RE7R01A (JR710E) 7-speed, the fix for harsh shifts and solenoid codes from worn bores.
A harsh or flared shift, a bang into Reverse or Drive, erratic downshifts, or a check engine light with a shift solenoid or gear ratio code on an Infiniti FX35, EX35, Q50, Q60, Q70, QX56, QX70 or QX80 usually traces back to the valve body in the Nissan/Infiniti RE7R01A 7-speed automatic, also cataloged under the JATCO codes JR710E and JR711E. This is a complete replacement valve body with the shift and pressure control solenoids already mounted, so it bolts in as one unit instead of you rebuilding the old casting on the bench or guessing whether a used solenoid will match a new valve body.
On the RE7R01A, the valve body and its linear solenoids control every clutch apply in the transmission. Line pressure from the pump is routed through the valve body's bores to the clutch that gear requires, and the linear solenoids modulate that pressure so each shift is smooth instead of abrupt. As the bores wear with age, pressure leaks past the clearance and the solenoids can no longer deliver the exact pressure the transmission control module is commanding, so the same hydraulic problem can look like a solenoid fault, a valve body fault, or both at once.
Start with a fluid and level check and a full code scan before you order a valve body. Low or burnt fluid, a failing pump, or a single bad connector pin can mimic the same symptoms. If the fluid is in good condition, the level is correct, and you still have shift solenoid or pressure control codes along with harsh or erratic shifting, the valve body and its solenoid pack are the documented wear point in this transmission family. Sonnax, which sells a bore-repair kit for this exact unit, notes that the JR710E, JR711E, JR712E and RE7R01A commonly show shift abnormalities from wear in the pilot valve bores that feed the control solenoids.
This valve body fits the Nissan/Infiniti RE7R01A 7-speed automatic as used across the Infiniti FX35, EX35, Q50, Q60, Q70, QX56, QX70 and QX80 lineup. Match the part number stamped on your old valve body against this listing, or send us your year, model and VIN, before you order, since Nissan revised the connector and calibration on this transmission across its production run.
Drain the fluid, drop the pan, unplug the internal harness and remove the valve body bolts, noting their lengths so they go back in the correct locations. Clean the pan and magnet, set the new unit in place, torque the bolts to spec in sequence, reconnect the harness and refill with Nissan Matic S (or an Idemitsu or Aisin equivalent rated for Matic S/J). On this transmission the control module expects calibration data matched to the valve body it is paired with, so plan on a capable scan tool writing that data to the module and completing the adaptive relearn before you judge the shift quality. We recommend replacing the filter and pan gasket in the same job so debris from the old valve body does not circulate into the new one, and a fill adapter tool makes setting the level through the side fill plug far easier than improvising one. If only a solenoid or two tested bad before you got here, our 9-piece solenoid kit is the lower-cost first step; once the valve body itself is worn, replacing the complete assembly is the more reliable repair. You can see everything else we stock for this transaxle on our transmission parts page.
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Yes. This is a complete valve body assembly with the shift and pressure control solenoids already mounted, so it bolts in as a unit rather than you sourcing and testing solenoids separately.
If a code scan and bench test point to one or two specific solenoids and the valve body bores test within spec, a solenoid kit can be the lower-cost first repair. Once the bores themselves are worn, replacing the complete valve body is the more reliable fix.
Nissan specifies Matic S for this transmission. Use genuine Nissan Matic S or an equivalent fluid, such as Idemitsu or Aisin's ATF-MSV, that is formulated for Nissan Matic S/J applications.
The transmission control module on this unit stores calibration data tied to the valve body it is paired with. After installation, a capable scan tool should write the new valve body's data to the module and the adaptive values should be relearned before judging shift quality.
Harsh or flared upshifts, a hard bang into Reverse or Drive, erratic downshifts, and shift solenoid or pressure control solenoid codes that push the transmission into a limited, fail-safe gear.
