Re:That super short grinding noise in first gear...

The Gen.2 ( SJ series ) had gear driven transfer boxes.

Roger

Then you definitely won´t hear the chain! I think last time I rode in one of those was in 1999...

l've occasionally noticed this noise on our 2020 Jimny, it's never got any worse in 16,000 miles and now we just ignore it.
ln fact my missus who drives the Jimny most of the time has never mentioned it.
Although as her previous vehicle was an old Defender, it's unlikely she would notice a bit of a noise occasionally in first gear.

As she pulled away in the Defender from cold, there was a screech from the release bearing that you could hear inside the house. And that was after a new clutch and "uprated" release bearing was fitted.

The garage stripped it down and fitted another release bearing. lt still did it, again only when cold. l mentioned it on the forum "yes that's common" was the reply.
After that we ignored the noise.

wrote:

As she pulled away in the Defender from cold, there was a screech from the release bearing that you could hear inside the house. And that was after a new clutch and "uprated" release bearing was fitted.

The garage stripped it down and fitted another release bearing. lt still did it, again only when cold. l mentioned it on the forum "yes that's common" was the reply.
After that we ignored the noise.

Td5 wasn't it? Not sure how the release bearing could physically make such a noise. Certainly not normal IMO. No idea what forum you posted about it.

I wonder if a vibration damper on the back axle, as fitted to the diesel Gen 3, would help.

Despite what Suzuki waffle about in the TSB, I think it is most likely caused by oscillations in the driveline, e.g. winding up and relaxing of the half shafts, whipping up and down of the diff nose as the axle rocks in the rubbers etc. The output gear is oscillating clockwise & anticlockwise and flicking the slight chain slack from one side to the other causing the noise.

You don't get it with an auto because the torque converter smooths out the torque fluctuations from the engine that are driving resonance in the rest of the driveline.

I have always thought it was the damping springs on the clutch plate having played with rally mini in the past which generated a similar noise but Suzuki are determined it's the chain vibrating

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