S46 NOISE' FRONT / AT TAKE-OFF - Alfa - 156 - eLearn

3233170 - 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

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily check that the wheels are correctly fixed	Continue to Step 1	Fixing not correct	Tighten the wheels correctly Op. 4450B10
1	SPRING/SHOCK ABSORBER ASSEMBLY CHECK	All OK	Problems met	Operation
	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 2	Fastenings not correct	Restore the fixings for the spring/shock absorber assembly Op. 4110A12
		Continue to Step 2	Spring/shock absorber assembly damaged	Replace the spring/shock absorber assembly Op. 4110A12
2	FRONT SUSPENSION BUSHES AND FLEXIBLE MOUNTINGS CHECK	All OK	Problems met	Operation
	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	Continue to Step 3	Arm supports worn or damaged	Replace the supports (see Assembly 4410B)
			Selector fork supports worn or damaged	Replace the supports (see Assembly 4410A)
			Anti-roll bar mountings worn or damaged	Replace the mountings Op. 4410C10
3	STEERING TIE-RODS AND ARMS CHECK	All OK	Problems met	Operation
	Check the condition of the steering tie-rods and arms.	Continue to Step 4	Tie-rods damaged or worn	Replace the tie-rids or balljoints Op. 4110B14
	Check the condition of the steering tie-rods and arms.	Continue to Step 4	Arms damaged or worn	Replace the steering box Op. 4130A10
4	CONSTANT VELOCITY JOINTS CHECK	All OK	Problems met	Operation
	Check the transmission constant velocity joints	Continue to Step 5	Joint damaged	Replace the joint Op. 2710A20
5	SUSPENSION FIXINGS CHECK	All OK	Problems met	Operation
	Check that the suspension is correctly fixed to the bodyshell, through the front crossmember	Continue to Step 6	Fastenings not correct	Restore the crossmember fixings Op. 4110D13
6	CHECK CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'