Shown on this page are the contents and location of each page on our website www.hlsmith.co.uk 

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• News
  • News
  • Bringing Up the Gear - fault diagnosis
  • H L Smith are exhibiting at ReMa Tec 2009 in Amsterdam
  • H L Smith install a new Manual Transmission Test Facility
  • See H L Smith at work
  • Fault diganosis in Allison World Series automatic transmissions
  • Fault diagnosis - gearbox
• Services
  • We provide a range of services
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• FAQ
  • Allison World Series automatic transmission
  • Problem with Allison automatic gearbox - no power to selector
  • Advice please - I'm unable to engage drive. The selector just beeps.
  • Problem - Selector says drive, but I have none, why might that be?
  • What should I do if the “Do Not Shift” light is on during vehicle operation?
  • Axle carrier failure
  • What is differential spinout?
  • What can create shock failure?
  • Lack of lubrication
  • Common gearbox faults
  • Problem - jumping out of gear (the gear lever moves from its engaged position).  What should I check?
  • Drivehead problems
  • What are the likely causes of an oil leak?
  • What might lead to excessive noise?
  • Loss of drive problem
  • Crabbing around corners
  • Electronic Control Units
  • What if my ECU doesn't work
  • Gearboxes - general questions
  • Is there a warranty on gearbox units?
  • How long does it take to repair a gearbox?
  • Are gearboxes tested?
  • Do you offer a fitting service?
  • Are air systems & control valves tested?
  • Do units come filled with oil?
  • Do you part repair?
  • Power Steering
  • Do Power Steering Units come with any warranty period?
  • What might cause the top seal or sector shaft to leak?
  • General steering problems:  Heavy Steering
  • Other steering problems.
  • Propshafts
  • My vehicle has a vibration, could it be the propshaft?
  • The vehicle developed a vibration after we changed the clutch / gearbox - why would that be?
  •  Will a vibration cause other problems?
  • How can I find out what is wrong with my propshaft?
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