2888464 - S46 NOISE' FRONT / AT TAKE-OFF

With the engine running, in the case of brisk acceleration / variations in torque, there is a noise (banging) in the area of the gearbox / transmission
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Preliminarily check that the wheels are correctly fixedContinue to Step 1Fixing not correctTighten the wheels correctly Op.   4450B10 
1SPRING/SHOCK ABSORBER ASSEMBLY CHECKAll OKProblems metOperation

Check the spring/damper unit and ensure the following in particular:

  • the spring/shock absorber assembly fixings are correct
  • there is no contact between the first spring coil and the end of the spring
Continue to Step 2Fastenings not correctRestore the fixings for the spring/shock absorber assembly Op. 4110A12
Spring/shock absorber assembly damagedReplace the spring/shock absorber assembly Op. 4110A12
2FRONT SUSPENSION BUSHES AND FLEXIBLE MOUNTINGS CHECKAll OKProblems metOperation

Check the condition of the bushes and mountings. In the order:

  • flexible supports for front selector forks and track control arms
  • anti-roll bar flexible mountings
Check in particular the condition of the rear wishbone bush
Continue to Step 3Rear wishbone bush damagedReplace the wishbone Op.   4410B40 
Anti-roll bar mountings worn or damagedReplace the mountings Op.   4410C10 
3CHECK THE STEERING LINKAll OKProblems metOperation
Check the condition of the steering link.Continue to Step 4Tie-rods damaged or wornReplace the links Op.   4110B10 
4CONSTANT VELOCITY JOINTS CHECKAll OKProblems metOperation
Check the transmission constant velocity jointsContinue to Step 5Joint damagedReplace the relevant joint (see Assembly 2710A)
5SUSPENSION FIXINGS CHECKAll OKProblems metOperation
Check that the suspension is correctly fixed to the bodyshell, through the front crossmemberContinue to Step 6Fastenings not correctRestore the front beam fastenings Op. 4110D13
6CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'