Clutch Slipping on stock A91 MT...

[kingdooksdb]

Any updates with regards to aftermarket clutch?

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[RenRed2]

Interesting point form a road test back in Jan in the USA . How the reviewer for the magazine found the clutch to be effectively used for good timing.

--For its part, the Toyota likes to be finessed; our 4.3-second time was the result of gently slipping the clutch and slow, purposeful shifts. --

https://www.motortrend.com/reviews/...nual-transmission-6mt-comparison-test-review/

 

[UYCR]

Any updates with regards to aftermarket clutch?

I don't think ACT has released any info yet or at least I haven't seen anything. We might just have to wait a bit more while TJ Hunt tests out their prototype clutch.

 

[AlaaTarawneh]

Confirming the clutch slip in A91MT coming for the Middle East region.

Took my car to the first track day after a month of owning it with 3000km on the clock.

During the out-lap and first hot lap, the car was acting normally and the clutch was kicking just fine. after 3rd and 4th hot lap started to feel the clutch slip and not come back as quickly as it should normally.


After reading and checking with friends, it is the same issue everyone is facing. and you need to fix by removing the clutch delay valve

I did not see any video for Supra so far doing it and seems ACT are doing a clutch upgrade soon

 

[RandomGuy7890]

These clutch issues are starting to scare me...
For the people who aren't having clutch issues, how hard do you drive the car? Track days? Spirited pulls every now and then?

 

[xkyo23]

No issues here… but those that are having issues, should remove your CDV. Remember these cars were abused by a ton of journalists prior to delivery, they were not easy on the manual.

those having issues, please post A video for everyone’s sake.

 

[kern417]

Going to double back on my original comment on the CDV Delete as well. If you plan on driving your car hard it absolutely helps mitigate excessive slip on fast shifts.

 

[lucky phil]

Confirming the clutch slip in A91MT coming for the Middle East region.

Took my car to the first track day after a month of owning it with 3000km on the clock.

During the out-lap and first hot lap, the car was acting normally and the clutch was kicking just fine. after 3rd and 4th hot lap started to feel the clutch slip and not come back as quickly as it should normally.


After reading and checking with friends, it is the same issue everyone is facing. and you need to fix by removing the clutch delay valve

I did not see any video for Supra so far doing it and seems ACT are doing a clutch upgrade soon

Under your scenario If I were you the first thing I would do is check the clutch fluid level. Fluid level too high, no room for hot clutch fluid to expand. The reservoir then pressurises and the clutch doesn't fully engage after releasing the pedal. Clutch slips and then it's a compounding effect until it burns out unless you are aware of what's happening.

Phil

 

[AJRMKV]

Under your scenario If I were you the first thing I would do is check the clutch fluid level. Fluid level too high, no room for hot clutch fluid to expand. The reservoir then pressurises and the clutch doesn't fully engage after releasing the pedal. Clutch slips and then it's a compounding effect until it burns out unless you are aware of what's happening.

Phil

Phil to the rescue again. The man is an automotive savant

 

[cbring]

These clutch issues are starting to scare me...
For the people who aren't having clutch issues, how hard do you drive the car? Track days? Spirited pulls every now and then?

Also curious to know if yall broke in the clutch or just went WOT from day 1

 

[xkyo23]

Also curious to know if yall broke in the clutch or just went WOT from day 1

Nobody will truly know, is all he say she say. There probably 1000 MT in the wild, we got like what 10 people (maybe) saying their sliping, half don’t know what sliping actually is or driven a BMW manual before. This is very similar to when the g80 manual first came out and a few threw out their clutch, but most are doing just fine. I have a friend who also tore down a MT stating the transmission itself is stronger than the ATs but again this is one of those “I have a friend stories” take what you will with a grain of salt. Remove your CDV, drive it how you like it, or just stop coming back here and sell your car for a 4Runner and be happy ?

 

[FuzzyRev]

Also curious to know if yall broke in the clutch or just went WOT from day 1

I would certainly hope nobody skipped a proper clutch break-in.

Whether or not the engine break-in procedure matters much in the long run is still debatable, but friction surface bed-in (i.e. brake pad-to-rotor & clutch friction disk-to-flywheel) is truly a non-negotiable. You either perform it correctly, or you don't, and not doing it correctly has dire consequences that usually can't be undone without full replacement of the components involved.

 

[FuzzyRev]

@Stvee @NitroYellowMKV @Sharocks @UYCR @FLtrackdays

Success! I just placed an order with TMNA for the slave cylinder and the metal line that connects to it. Will get an ETA tomorrow..

Keep us updated !

Update: ETD/ETA currently points to the end of April at the earliest

 

[FuzzyRev]

Under your scenario If I were you the first thing I would do is check the clutch fluid level. Fluid level too high, no room for hot clutch fluid to expand. The reservoir then pressurises and the clutch doesn't fully engage after releasing the pedal. Clutch slips and then it's a compounding effect until it burns out unless you are aware of what's happening.

Phil

 

[Darth]

Got some feedback on two Supras. Both are driven hard on street/ track with no issues so far. Milage is around 3000-4000. Both on stock power, however they upgraded thier brake fluids for track use. Since the brake and clutch fluids are shared in one reservoir, I am suspecting this could be the issue.

Maybe this and the cdv delete are the best solutions for now.

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