Automatic gearbox specialists
Is your automatic gearbox slipping?
Engine revs rise, the car does not pick up. Flare between gears, or a pause then a surge. Slip does not polish out.
- Revs climb on a hill or a merge, road speed does not?
- A flare into the next gear, then a thump?
- A burnt smell after a short run in traffic?
A slipping automatic is losing its grip. Clutch packs glaze, fluid burns, heat rises. That is specialist work. That is core work at Service4Service.
Every extra mile on a slipping auto cooks the oil and the packs. Call while it still moves.
8am - 5.30pm Mon-Fri
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What does a slipping automatic gearbox feel like?
An automatic gearbox is slipping when engine revs rise but the car does not accelerate to match. Common causes are worn clutch pack plates, low or burnt fluid, a weak oil pump or a faulty torque converter, and on a CVT, belt or pulley slip. Slipping creates heat and damages the gearbox, so stop driving and get it diagnosed.
Slip is when the engine races and the car does not follow. On a conventional automatic gearbox that is usually worn clutch pack plates, low or burnt automatic transmission fluid, or a weak gearbox oil pump.
A dual-clutch can slip on one clutch, so odd or even gears feel hollow. A CVT flare is the belt or pulleys losing hold.
Ford Powershift and Volkswagen DSG shudder and slip in traffic. Either way, start with a diagnostic check. If it has already gone into limp mode, crawl to safety.
- Revs rise without matching acceleration
- Common causes: worn clutch packs, low fluid, a weak pump or a converter fault
- Heat from slipping speeds up the damage
- A fluid change will not restore worn friction plates
A slipping automatic will not bed in
Friction material that is already glazing does not grow back. Keep launching it and you dump debris into the valve body. Then you are looking at more than a clutch job.
Slipping symptoms people search
If any of these sound like your car, do not wait for it to fail on the road.
Revs rise, speed does not
Classic slip. Heat follows.
Flare between gears
The next pack is late.
Worse when hot
Oil thins. The grip fades.
Burnt smell
Clutch material in the oil.
Delayed Drive then a surge
Pressure or packs.
One clutch gone on a dual-clutch
Odd or even ratios feel dead.
Why an automatic slips
Packs clamp with oil pressure. Low level, a tired pump or a sticking solenoid starves that clamp. A torque converter can also slip if the lock-up clutch is gone.
Wrong spec oil on a ZF gearbox or a dual-clutch can mimic wear. Spec still matters.
The pack should clamp
Pressure and friction do the work.
Grip fades
Revs rise first, then heat.
Debris spreads
The rest of the unit suffers. It only gets worse.
Slipping-automatic work we do
We diagnose whether slip is fluid, a pack, a converter or control, then repair the automatic. We will not sell a flush as a cure for burnt plates.
- Pressure and road-test diagnosis
- Clutch pack and converter repair
- Dual-clutch pack slip
- Collection when it should not be driven
Still driving a slipping automatic?
That flare is the unit asking for help. That is automatic gearbox repair. Call before you have no Drive.
Why this work comes to Service4Service
- Automatic and dual-clutch work is core work, not a sideline
- Diagnosis before parts
- Collection when the car should not be driven
- 12 months or 12,000 miles on parts and labour
Guarantee and payment
Repairs are backed by a 12 month or 12,000 mile warranty on parts and labour. See Payment Options for ways to pay.
Slip is lost grip. Judder is a shake. You can have both. Both need a test.
Only if the oil was the whole story. Glazed packs will still slip.
You can, briefly. You should not. Heat wrecks it faster.
On an automatic the clutch packs live in the gearbox. It is gearbox work.
No.
Cold oil and a weak pump delay clamp. Wet roads are a red herring if the revs still race.
The usual causes are worn clutch pack friction plates, low or degraded fluid, a weak oil pump, a faulty solenoid or valve body leaking pressure, or a failing torque converter. On a CVT, a worn belt, chain or pulley faces can slip.
It feels as if the car has slipped into neutral for a moment: the engine revs rise, the car hesitates or loses pull, then it may catch with a bang. It may be worse when hot, in a particular gear or when climbing or accelerating.
Yes. Clutch packs need hydraulic pressure to grip, and low fluid, aerated fluid or a blocked filter reduces it. Check for leaks and diagnose the cause, because simply topping up may mask a leak or damage that is already present.
Related guides
Do not keep launching a slipping automatic
If revs rise and the car does not follow, tell us the symptoms. Slip diagnosis is work we do every day.
