Probleme transmisie Haldex FL2 - articol analiza defecte BellEngineering UK

[alex01]

Buna tuturor

 

pentru cei care au FL2 din prima generatie, poate fi de interes articolul de mai jos (l am gasit cautat raspunsuri pt prob de transmisie de FL1 meu) si sper sa va ajute. Se refera la probleme de transmisie la masini Euro4 in special seriile dintre 2007-2009-2011.

 

http://www.bellengineering.co.uk/fault-symptoms/

 

"Freelander 2 / Evoque - Common Problems And Symptoms

If there is a drumming or humming sound coming from the rear of your Freelander 2 or Evoque, the chances are the rear diff bearings are failing. This is very common on the 2007-2011 models and can occur even in very low mileage vehicles. According to Land Rover The damage is caused due to the way in which the Haldex coupling unit applies torque when moving away from standstill or during slow speed manoeuvring. We actual believe the main cause of the failure is that the size/load rating of the nose bearings on these units were too small when designed and manufactured by Land Rover, at Bell Engineering we have devised a method to modify the diff to allow us to fit a larger nose bearing that can withstand 25% greater loading, greatly improving the life of these diffs. These upsized bearings are fitted to all our diffs from April 2015 onwards. At present we are the only company offering the upsized bearing.

 

From 2009 models onwards the Haldex unit was also upgraded to the 4th generation, which if taken to a Land Rover dealer will accept updated software (early models have the 3rd generation fitted which cannot be reflashed) which Land Rover state will also reduce the load on the pinion.

 

An "All terrain mode disabled" message appearing on the dashboard signifies an issue with the Haldex unit. There are several reasons for this;-

• The Loom between the haldex unit and the cars loom can rub between the rear subframe and the body, causing a short in wiring
  
• The fuse to the Haldex unit (Fuse FB6 or FB2 on later cars in the rear fuse compartment) has blown
  
• The Haldex electric pump has failed
  
• The Haldex pressure sensor has failed
  
• The Haldex unit requires a full service
  

If the car is suffering a juddering on full lock and there are no error messages displayed this is a sign that the Haldex unit is failing/failed internally, unfortunately the only solution is to change the complete unit for a reconditioned or new unit.

 

At Bell Engineering we consider the low cost servicing of the Haldex unit imperative to sustain the correct operation and future life of the component and recommend the Haldex unit has the fluid and filter change every 20k miles. Land Rover do not state the Haldex unit and fluid as a serviceable item, but other manufactures who use the same units do.

 

A drumming or whirring noise from the front footwell area of the car, that can then if left develop into a banging or graunching noise is a symptom of the front transfer box (otherwise known as power transfer unit, PTU, front diff or IRD) nose bearing failing. If treated quickily enough the unit can be fully reconditioned with new bearings and seals throughout, but if left too long will fail catastrophically. The splines from the gearbox to this unit also wear, if the transferbox is failing it can also cause damage to this spline (see below).

 

If the car is suffering from front wheel drive only, there are several possible reasons:-

• The splines between the gearbox and front transfer box have stripped
  
• The crown wheel and pinion have stripped inside the transfer box
  
• The haldex unit has failed or been disabled
  
• The propshaft, diff or rear driveshafts have been removed
  

You have bought the 2wd version of the vehicle"