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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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03-21-2016, 03:16 AM | #29 |
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Still the same issue, even stock
Thanks very much just to give you guys an update my dad has since removed the supercharger and returned it to stock except for the exhaust. My dad thinks it may be the torque converter because it is back to stock and when the gearbox gets backup to temp and flooring it again it does the same but only lightly now....so we don't know any suggestions, can it be that the thortlebody got too warm and is getting stuck on the shifts or can it be that the thortlebody just has so many shifts before it acts up ??
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03-21-2016, 03:19 AM | #30 | |
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03-21-2016, 10:55 AM | #31 |
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Something mechanical. Im putting my money on the TQ converter.
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03-22-2016, 01:55 AM | #32 | |
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Is really unfortunate for you/us all... Now I wonder how much longer I have left in my AT. |
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03-22-2016, 02:23 AM | #33 | ||
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It's kind of worrying unlike the manuals which have proven themselves for the most part reliable till 280 whp+ on stock clutches and such, the autos haven't had much testing in that department.
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03-28-2016, 11:01 AM | #34 | |
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Just to remind everything is back to stock the motor,ECU everything except the exhaust with a high flow cat in and axle back exhaust in. The problem exist still but we don't know what the problem is really and is scared to buy a new well anything because we may end up paying for something that wasn't needed... Just scared for the cost, for the most part other then that we would love too get it fixed. |
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03-28-2016, 11:19 AM | #35 | |
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03-28-2016, 11:59 AM | #36 |
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We have replaced the transmission fluids 2 times have taken it to toyota 2 times and none of them can tell us what is wrong.
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03-30-2016, 05:05 PM | #37 |
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I too am running into issues
So I just wanted to chime in and say that I'm also running into the same issue.
I'm boosting 8psi on a AVO kit and I will be taking that up to 12 psi with E85 soon. I'm getting a tyranny rebuilt by SSP with a set of their Stage1 clutches, their stage 2 valve body and their higher stall torque converter. I'll report back what I find after I have broken in the transmission and put a 1000 or so miles on it.
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03-31-2016, 02:39 AM | #38 |
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I have a theory, and I'm putting it out there for the back-seat drivers to shoot holes in and insult me, but also for the few serious tuners to try out and see if this fixes the problem.
Since these cars are Drive-By-Wire, it would make sense for the pedal input to be sent to the transmission controller. What if the DBW table is too aggressive? What if the table just needs to backed down some so the car is making the same power at the same pedal travel, and really cranks up at the end of the travel? The MT DBW table is less aggressive than the AT DBW table. Maybe try that out and see if there is any difference in the full-load shifting problem. I personally would like it if someone found some kind of back-door into the TCU with Toyota's Techstream software.
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03-31-2016, 03:20 AM | #39 | |
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03-31-2016, 03:20 AM | #40 | |
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How long have you had the turbo? And how well did the transmission behave before the rebuild?
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03-31-2016, 03:06 PM | #41 | |
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i've seen some boosted animals running beefed up converters without this issue... so as a last resort, you could get one and then send in your core |
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03-31-2016, 06:40 PM | #42 |
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I've had the turbo for about 16 months. The really alarming symptoms have happened in the last few months. Especially when it's really cold outside.
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