Automatic gearbox specialists
Having a flexplate issue?
A knock on take-off, a starter that will not catch, or a cracked plate behind the converter. It will not weld itself.
- A bang when you select Drive that is not a shift?
- Starter spins but the engine does not always catch?
- Confused with a dual-mass flywheel quote?
A flexplate bolts the engine to the torque converter on a conventional automatic. It is thin, it flexes, and when it cracks you hear a knock. Flexplate diagnosis sits with automatic work at Service4Service.
A cracked flexplate can leave you stranded. It is not a dual-mass flywheel kit.
8am - 5.30pm Mon-Fri
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What is a flexplate?
A flexplate is the automatic's flywheel. It carries the starter ring gear and bolts to the torque converter. It is not a dual-mass flywheel, which belongs with a pedal clutch.
On a conventional automatic gearbox a cracked plate can knock like a failed mount or a converter. A diagnostic check and a look behind the bellhousing settle it.
Dual-clutch cars are a different layout. Do not order a flexplate for a dual-clutch without confirming the hardware.
A cracked flexplate can leave you with no start
The knock gets louder, the starter ring can shed teeth, then the engine will not crank. Leave it and you can damage the converter or the crank sensor reading.
Flexplate symptoms people search
If any of these sound like your car, do not wait for it to fail on the road.
Knock on Drive or Reverse
A crack opening under load.
Starter click or no crank
Ring gear damage.
Vibration at idle in Drive
A bent or cracked plate.
Metal around the bellhousing
Do not keep starting it.
Confused with a DMF rattle
Wrong part if the car is an automatic.
After a converter job
Bolts must be torqued. A miss here cracks plates.
How a flexplate works
The engine turns the plate. The plate turns the converter. The converter then drives the planetary gear set through fluid.
Cracks start at the bolt circle or the ring gear weld. Heat and a seized converter make that worse.
The engine turns the plate
The converter takes up the drive.
A crack opens under load
You hear a knock in Drive.
The ring gear or plate fails
No start, or worse. It only gets worse.
Flexplate work we do
We diagnose knock versus converter versus engine mount, then replace a cracked flexplate as part of automatic repair when that is the fault.
- Knock versus converter diagnosis
- Flexplate replacement with converter work
- Starter ring inspection
- Collection if it may not restart
Still knocking into Drive?
A bang that is not a shift can be the plate. That is automatic gearbox repair. Call before the starter stops catching.
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.
No. A flexplate is the automatic part. A dual-mass is a manual clutch part. We do not do manual DMF kits.
The converter usually has to come off. We inspect both.
If the converter is seized or the bolts were wrong, yes. We check the cause.
Layouts differ. Some use a dual-mass style damper. Confirm the car.
No.
No. You can wreck the starter and the ring gear.
Related guides
Do not ignore a knock that is not a shift
If Drive bangs and the starter is getting lazy, tell us the symptoms. Flexplate work sits with automatic repair.
