Transmission mounts

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Titch
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Transmission mounts

Post by Titch » Thu May 11, 2017 7:28 am

Hi all,

My e46 Coupe has slowly developed a knocking sound that seems to originate directly below the transmission. Also, feel a knock between gear changes when putting my foot down. I suspect the mounts are shot. It's an auto with 123k. Does anybody know if the mounts are just regular 328ci ones that the car was based on or alpina specific?

Cheers Titch
JB

Alpina B3 Coupe, Topaz Blue with Silver Leather

Adwo
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Post by Adwo » Thu May 11, 2017 8:41 am

Much more likely to be the mounts in the diff, or worse the rear subframe mounts have sheared from the chassis, causing the entire subframe to flex..

If your car has already had these fixed then the transmission mounts or center support bearing maybe the culprit..

HTH,

Adwo
2006 E46 B3 S convertible #165
2000 E46 B3 3.3 limo #172
1999 Mitsubishi Evo 6 RS
2020 Polestar 2

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Charles
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Post by Charles » Sat May 13, 2017 12:18 pm

You might also want to consider the centre bearing on the propshaft.
Charles
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Titch
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Post by Titch » Mon May 22, 2017 12:28 pm

Just to update: had the car up on the ramp and found numerous items needed replacing: this is what I had done.
Propshaft donut
Diff mounts
Rear axle bushes
Exhaust centre box bracket

Made a hell of a difference! Well chuffed... :P
JB

Alpina B3 Coupe, Topaz Blue with Silver Leather

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MickB3
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Post by MickB3 » Mon May 22, 2017 1:05 pm

Titch wrote:Just to update: had the car up on the ramp and found numerous items needed replacing: this is what I had done.
Propshaft donut
Diff mounts
Rear axle bushes
Exhaust centre box bracket

Made a hell of a difference! Well chuffed... :P
Brilliant 8)

Just as an aside has anyone heard of a ALPINA e46 Sub frame mounts shearing?
Had a look at mine and there is no issue at all. My brothers M3 has had the Patch done at sometime in its life.
E46 B3 3.3 ALPINA

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Charles
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Post by Charles » Tue May 23, 2017 8:55 pm

Titch wrote:Just to update: had the car up on the ramp and found numerous items needed replacing: this is what I had done.
Propshaft donut
Diff mounts
Rear axle bushes
Exhaust centre box bracket

Made a hell of a difference! Well chuffed... :P
Pleased you located the noises. Did you check the centre mount/bearing for the propshaft at the same time?
MickB3 wrote:Just as an aside has anyone heard of a ALPINA e46 Sub frame mounts shearing?
Had a look at mine and there is no issue at all. My brothers M3 has had the Patch done at sometime in its life.
IIRC, this happened on early E46 variants - typically late 90s - but I haven't heard of the same on later models. HTH
Charles
Teacher of Chemistry and driver of ALPINAs - not necessarily in that order ;)
B3S Touring (49/116) - been to the moon and now on the way back!
Renault Grand Espace - not mine but the wife's!

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Post by Adwo » Tue May 30, 2017 12:06 am

MickB3 wrote:
Titch wrote:Just to update: had the car up on the ramp and found numerous items needed replacing: this is what I had done.
Propshaft donut
Diff mounts
Rear axle bushes
Exhaust centre box bracket

Made a hell of a difference! Well chuffed... :P
Brilliant 8)

Just as an aside has anyone heard of a ALPINA e46 Sub frame mounts shearing?
Had a look at mine and there is no issue at all. My brothers M3 has had the Patch done at sometime in its life.
My B3 3.3 had a sheared subframe, 1999 car..
2006 E46 B3 S convertible #165
2000 E46 B3 3.3 limo #172
1999 Mitsubishi Evo 6 RS
2020 Polestar 2

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