S-Mode Quirks

juld0zer · 10-08-2013, 10:04 AM

It's early days for me but i think i fixed mine. My sloppy SRM action (not enough blip resulting in rough unpredictable shifting) was due to fine metal particles stuck to the tip of the input speed sensor. The sensor is on the left side of the gearbox almost perpendicular to the rear cat flange. I found no visible damage to the loom due to heat or physical damage.
Think of the crap that gets stuck to a magetic engine oil sump plug. That's the amount and fine-ness of this silvery coloured substance i found on the tip.
From my experience with these type of sensors, any metal on the tip can interfere with signal production.
The same type of sensor is responsible for sloppy shifts in automatic transmissions of orher cars.
There seriously wasnt much of this material on the sensor but cleaning it was enough to restore smooth up and down shifting at various rpm. No more holding breath as i re engage clutch!
I will report back in 1000km to see if it holds up. but i will look into fitting a magnetic gearbox drain plug to keep those metal particles at bay.

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10-08-2013, 10:04 AM	#19 (permalink)
juld0zer Enthusiast Member Join Date: Nov 2012 Location: Sydney Posts: 428 Drives: 11 Nissan 370Z MB M6 Rep Power: 139	It's early days for me but i think i fixed mine. My sloppy SRM action (not enough blip resulting in rough unpredictable shifting) was due to fine metal particles stuck to the tip of the input speed sensor. The sensor is on the left side of the gearbox almost perpendicular to the rear cat flange. I found no visible damage to the loom due to heat or physical damage. Think of the crap that gets stuck to a magetic engine oil sump plug. That's the amount and fine-ness of this silvery coloured substance i found on the tip. From my experience with these type of sensors, any metal on the tip can interfere with signal production. The same type of sensor is responsible for sloppy shifts in automatic transmissions of orher cars. There seriously wasnt much of this material on the sensor but cleaning it was enough to restore smooth up and down shifting at various rpm. No more holding breath as i re engage clutch! I will report back in 1000km to see if it holds up. but i will look into fitting a magnetic gearbox drain plug to keep those metal particles at bay.