Sunday, February 25, 2007 - 04:32 pm, by: Wafi Cheebo(Wafi)
Hi guys,
I have done some searching on this topic and didnt find much so I just started this post just to see if anyone can help me. I have a 1991 uzz31, when driving normally all is fine, but when I want to take off harder, not on a straight road basically just around a corner my transmission seems to takeoff in 2nd gear and no matter how much I push the accelerator it just tries to rev out in second gear, it doesnt seem to kick back down into first gear, is there something I can adjust for the transmission to kick down into first gear? Where as if I stop completly and take-off it takes off in first gear, but if the car is moving slightly, it will be in 2nd gear and wont kickdown into first. Thanks
Sunday, February 25, 2007 - 06:05 pm, by: Wafi Cheebo(Wafi)
Thanks Shane Even when the switch is on pwr or norm, I didnt notice a difference at all, when I am in 3rd or 4th and I kickdown it is perfectly fine but when I am in 2nd it wont kickdown into first, im not sure if im driving it properly?
Sunday, February 25, 2007 - 06:48 pm, by: David Vaughan(Davidv)
quote:
...when I want to take off harder, not on a straight road ... just around a corner...
Are you suggesting that it kicks down on the straight but not in a corner? Have you compared your speeds with the kickdown range published on ALSC?
Perhaps the ECU is sufficiently intelligent that it will not kick down while the steering is turned but, alas, I already know that is not true for kickdown from higher gears, which is a prime reason I now have a manual. It seems to me that a failure to kick down while accelerating in a bend should be regarded as a virtue, not a problem
Brian Timms TryHard New South Wales TT Soarer Goodness.
Sunday, February 25, 2007 - 08:32 pm, by: Brian Timms(Turbo_brian)
Solenoid on it's way out maybe???
Soarers do have speed sensative steering, so the ECU will know the car is turning, but I doubt it's going to stop the car kicking back in gears, but if you have a dud or dying solenoid, that will definately stop the gears kicking back.
Monday, February 26, 2007 - 06:38 am, by: Matthew Sharpe(Madmatt)
Bruce has a similar problem with his car. He took it in to a Lexus specialist, they plugged it in and it reported as a combo of a faulty solenoid and a problem with the lockup clutch. His was also showing a ECT error on the scrolly at times.
Monday, February 26, 2007 - 06:58 pm, by: Wafi Cheebo(Wafi)
Yes I have tried an ECU reset, same thing no luck. What I am trying to explain is when I take off from a complete stop of a red light into a straight line it takes off fine, but when I am completely stopped and I take off and turn a little corner, for example I am taking of a traffic light and turning the corner, after I have turned the corner and Planted my foot down it doesnt kick down into a lower gear, it just tries to takeoff in 2nd gear and doesnt feel right?? When I am already moving and I turn a corner at higher speeds, it can down gear but at low speed it doesnt?? I also dont have any error codes with my tranny. Thanks guys for all replies keep them coming.
Monday, February 26, 2007 - 07:41 pm, by: David Vaughan(Davidv)
Sounds normal enough so far. It starts in first gear, by the time you turn a corner it is in second and probably doing 20-30km/h so it will be reluctant to go back to first, and why should it?
You have not answered the question from Pen and I about whether it kicks down (not starts in 1st from rest) in a straight line. If it does, at what speed?
Tuesday, February 27, 2007 - 10:39 pm, by: Wafi Cheebo(Wafi)
Thanks Matt, I do not have traction control, it is a 1991 model, I dont think they came with trac? And yes the car goes way harder off the mark in a straight line, but that is by putting the foot down suddenly, and If I take off slowly and reach about 50-60 kmph and then put the foot down this is the speed it downgears, where as if I take of slowly and then suddenly at about 20kmph I put the foot down it will just lag and wont kickdown, probably because it is still in 2nd gear like around the corners if that answers the question? But I am getting a major service from Lexus this friday with the trans fluid change, see how that goes??
Wednesday, February 28, 2007 - 08:58 am, by: Matthew Sharpe(Madmatt)
Really does sound like its behaving like Bruce's UZZ31. I'm guessing after what the Lexus mechanic told him a big part of the problem is the torque locking clutch not disengaging.
Thursday, March 01, 2007 - 05:17 pm, by: Wafi Cheebo(Wafi)
Well what do you know, you learn something new everyday LOL, for you guys with traction control, does it have much of an effect in the wet? Because I cant seem to get any traction in the wet.
Thursday, March 01, 2007 - 06:25 pm, by: Shane McInnes(Soarin_tt)
I have TRC (traction control) and i hate it. I always turn it off. But when it rains heavily i leave it on lol. It works great in the wet and dry but i really dont like using it in the dry.
Thursday, March 01, 2007 - 08:32 pm, by: Wafi Cheebo(Wafi)
Does this traction control engage the breaks to stop the wheels from spinning or does it shut off the throttle? I know it is linked up to the ABS system?
Friday, March 02, 2007 - 04:28 pm, by: Tai Johnsen(Privatejohnsen)
I think it does both.. Limit the throttle and apply brakes to the spinning wheel..
I may or may not have found this out when i had one rear wheel off the ground and was still able to move forward because the brake stopped the wheel in the air from spinning momentarily thus moving me forward.. I thought i had an LSD for a little while
Friday, March 02, 2007 - 04:57 pm, by: David Vaughan(Davidv)
Will, there is a kit which apparently fits fairly readily to fuel-injected cars equipped with ABS. I do not recall its name but it was a British product. It also lets you select how much over-spin it will allow on the rear wheels, which means you can set up the car from wet conditions to near-racing.
Shane, it cuts power to a low level rather than limiting RPM. It steps in when the rear wheels are revolving faster than the front by more than some small percentage. The ABS sensors provide this feedback.
Braking with ABS can and should be more efficient than braking without it but accelerating with TRC triggering means you just go nowhere, It is not a faster way around a wet corner.
Don Bagnall Moderator New Zealand I have WAY less Soarers than Hayden :-(
Saturday, March 03, 2007 - 02:22 am, by: Gareth Richards(Garethr)
http://mkivsupra.net/vbb/ if you want opinions of the Racelogic system. It's very popular with UK Supra drivers, who, every winter, show an unnerving tendency to go spinning off into the British scenery when the second turbo comes in and/or the auto changes down to second in the middle of a greasy bend.
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