Quickshift Gearbox Accumulator Renault

Twingo 1 2001-2007 · Twingo 2 2007-2014 · Clio 2 2001-2007 · Clio 3 2005-2014 · Modus 2005-2012 · Grand Modus 2008-2012 · Trafic 2 2005-2014 · Master 2003-2024 — all petrol/diesel engines fitted with the Quickshift gearbox.

Petrol, diesel, Twingo 1: the Quickshift parts compatibility guide.

slow or jerky gear changes, jolts when accelerating, unexpected return to neutral (N), unexpected switch to manual mode, engine will not start, automatic gearbox warning light on, gearbox stuck in limp mode.

DF005, DF078, P0944, DTC0944. If your diagnostic tool shows code DF078 or P0944 (insufficient hydraulic pressure), the pressure accumulator is the most frequent cause.

Meaning:

• DF005: oil pressure sensor circuit.
• DF078 / P0944: hydraulic control (pressure too low, pump fault, loss of pressure or accumulator fault).

Full list: Quickshift fault codes (DF, DTC and P-code).

Without a diagnostic tool, in 2 minutes: bonnet open, switch the ignition on without starting the engine, foot on the brake. Select 1st, then 2nd, then 3rd gear while listening to the electric pump (a small electric motor that whines on the gearbox side).

• It starts on the 3rd shift: the accumulator is in good condition.
• From the 2nd shift: it is starting to wear.
• On every shift: it is worn out, replace it.

With a diagnostic tool: the pump should start at around 40 bar and stop at around 50 bar. A DF078 / P0944 code (hydraulic control) confirms a pressure problem.

Guide with video: diagnose the gearbox in 8 seconds.

• The car will not start: do the lever test first. Unplug its connector and start again: a faulty lever causes the same failure to start.
• Gears engage with the engine off, but no longer with the engine running: it is the clutch, especially on diesels, not the pressure.
• The diagnostic tool points to the pressure sensor: do not replace it first, it is rarely at fault. Finish diagnosing the accumulator and the electric pump.
• An oil stain appears under the car just after a repair: most of the time, the reservoir has been overfilled and overflows overnight, while the circuit depressurises.

We strongly recommend replacing the accumulator and its electric pump at the same time, as these two parts wear at the same rate.

7701070496, 7701063957.

• Fitting wrench — essential: removing the accumulator requires this wrench; the space around the accumulator is very tight and no standard spanner can reach it.
• Robot oil — essential: the job requires topping up the oil level.

1. Release the pressure. Never unscrew an accumulator under pressure (40 to 50 bar): it is impossible and dangerous. Either:

• depressurise with the diagnostic tool;
• leave the vehicle standing for 48 to 72 h, with the electric pump or battery disconnected;
• electric pump disconnected, ignition on, foot on the brake: change gear until the gears no longer engage (the warning light comes on).

2. Unscrew the accumulator with the fitting wrench, pushing forwards. Once the pressure has dropped, it comes loose easily.

3. Screw in the new accumulator firmly, with its seal.

4. Top up the oil level, cold: 38 mm above the reservoir joint. With the ignition on, the level should drop to the joint. Do not add more: the reservoir would overflow after the car has been standing for more than 48 h.

No bleeding or reprogramming is needed.

Guide with video: fitting the accumulator.