Gear Shift problem even after new transaxle
06-07-12, 08:45 AM
#16
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and it never comes down from 1000? if you just leave it in d when stopping at say, a traffic light? Thats def weird
06-07-12, 11:08 AM
#18
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06-07-12, 11:37 AM
#19
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Thanks Salim..
To anwser the first question. I do not have any specifics on how they calculate their shift points but they generally base this off alot of variables. ie. Load, thorttle position, RPM, etc...
My knowlege of the ecu and its functions comes from tuning my race truck and some other cars. Each manufacture doesn't reinvent the wheel.
To anwser the first question. I do not have any specifics on how they calculate their shift points but they generally base this off alot of variables. ie. Load, thorttle position, RPM, etc...
My knowlege of the ecu and its functions comes from tuning my race truck and some other cars. Each manufacture doesn't reinvent the wheel.
06-09-12, 04:17 AM
#20
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Hi guys,
I checked with the dealer. they say that they hav changed all the solenoids. so let me hope that sticky solenoid problem is ruled out.
No ECL , so electronic circuit is ok
exhaust system seems ok
that leaves engine? I changed engine mounting blocks and found hesitation in gear shift reduced considerably. but problem s still there. I see some minor oil leak from engine- may be this is the symptom of engine problem.
I checked with the dealer. they say that they hav changed all the solenoids. so let me hope that sticky solenoid problem is ruled out.
No ECL , so electronic circuit is ok
exhaust system seems ok
that leaves engine? I changed engine mounting blocks and found hesitation in gear shift reduced considerably. but problem s still there. I see some minor oil leak from engine- may be this is the symptom of engine problem.
06-09-12, 05:43 AM
#21
Lexus Test Driver
The gear shift problem from 2nd to 3rd is in detail:
Up to 2nd gear the change is normal. After 2nd when the throttle is pressed more then the gear doesn't shift upwards till much higher rpm (3500-4000 rpm) then with hesitation it goes to 3rd gear and engine rpm comes down to 2500-2750 for 50mph speed. downward shift does not have any hesitation.
most important, when engine is cold, the gear shifting is very much smooth. The problem aggravates after driving for sometime.
Problem was already there before transaxel change. I always thought and mechanics told me that this problem is related to Tranny. but i found that it is something else (after a deep hole in pocket).
Up to 2nd gear the change is normal. After 2nd when the throttle is pressed more then the gear doesn't shift upwards till much higher rpm (3500-4000 rpm) then with hesitation it goes to 3rd gear and engine rpm comes down to 2500-2750 for 50mph speed. downward shift does not have any hesitation.
most important, when engine is cold, the gear shifting is very much smooth. The problem aggravates after driving for sometime.
Problem was already there before transaxel change. I always thought and mechanics told me that this problem is related to Tranny. but i found that it is something else (after a deep hole in pocket).
I suggest you talk to the mechanic, and see if he can find a ground cable that he may have forgotten to re-attach.
06-09-12, 06:14 AM
#22
Although smooth/quiet, my '01 RX Awd engine feels a bit "lathargic" and lazy as the OP's.
My 1-2 shift is long(ish) but the other gear changes are OK. At only 78 K miles, the engine doesn't have the scoot it did when new. This RX used to really move well. Now, it just kind of loafs around.
When the engine is just started/cold, and putting the shifter into drive, the 1-2 shift is really drawn out and then very, very smoothly(like a rubber band in slow motion) shifts into 2nd gear. I may be exagerating this a bit to make a point. And it does get better when the engine is warmed up. But after each stop(stop light/stop sign) and taking off again, the 1-2 shift is always longish. Not crisp shifting as with WOT.
The seat of the pants feel that I experience is similar to watching an air bag test in slow motion. Nothing is harsh and the tranny never BANGS into gear. It's just kinda Blaaaaaah! Always been this way. Well, after warranty anyway!
Another area that I feel that the engine is lacking power is, on the hiwy. When cruising @ hiwy spds, and doing a WOT downshift, although the engine is smooth and the tranny is resopnsive, there just seems to be little power/speed as there once was. It's just kinda...smooth/quiet engine, nice rev, responsive downshift from the tranny to 3rd or 2nd gear and not much passing power as though the engine isn't breathing well like when a person takes a Deeeeeep Breath.
Yes, my airfilter is clean and there are no restrictions, Could it be the VVT-i ?
My 1-2 shift is long(ish) but the other gear changes are OK. At only 78 K miles, the engine doesn't have the scoot it did when new. This RX used to really move well. Now, it just kind of loafs around.
When the engine is just started/cold, and putting the shifter into drive, the 1-2 shift is really drawn out and then very, very smoothly(like a rubber band in slow motion) shifts into 2nd gear. I may be exagerating this a bit to make a point. And it does get better when the engine is warmed up. But after each stop(stop light/stop sign) and taking off again, the 1-2 shift is always longish. Not crisp shifting as with WOT.
The seat of the pants feel that I experience is similar to watching an air bag test in slow motion. Nothing is harsh and the tranny never BANGS into gear. It's just kinda Blaaaaaah! Always been this way. Well, after warranty anyway!
Another area that I feel that the engine is lacking power is, on the hiwy. When cruising @ hiwy spds, and doing a WOT downshift, although the engine is smooth and the tranny is resopnsive, there just seems to be little power/speed as there once was. It's just kinda...smooth/quiet engine, nice rev, responsive downshift from the tranny to 3rd or 2nd gear and not much passing power as though the engine isn't breathing well like when a person takes a Deeeeeep Breath.
Yes, my airfilter is clean and there are no restrictions, Could it be the VVT-i ?
06-11-12, 08:30 AM
#24
Super Moderator
Although smooth/quiet, my '01 RX Awd engine feels a bit "lathargic" and lazy as the OP's.
My 1-2 shift is long(ish) but the other gear changes are OK. At only 78 K miles, the engine doesn't have the scoot it did when new. This RX used to really move well. Now, it just kind of loafs around.
When the engine is just started/cold, and putting the shifter into drive, the 1-2 shift is really drawn out and then very, very smoothly(like a rubber band in slow motion) shifts into 2nd gear. I may be exagerating this a bit to make a point. And it does get better when the engine is warmed up. But after each stop(stop light/stop sign) and taking off again, the 1-2 shift is always longish. Not crisp shifting as with WOT.
The seat of the pants feel that I experience is similar to watching an air bag test in slow motion. Nothing is harsh and the tranny never BANGS into gear. It's just kinda Blaaaaaah! Always been this way. Well, after warranty anyway!
Another area that I feel that the engine is lacking power is, on the hiwy. When cruising @ hiwy spds, and doing a WOT downshift, although the engine is smooth and the tranny is resopnsive, there just seems to be little power/speed as there once was. It's just kinda...smooth/quiet engine, nice rev, responsive downshift from the tranny to 3rd or 2nd gear and not much passing power as though the engine isn't breathing well like when a person takes a Deeeeeep Breath.
Yes, my airfilter is clean and there are no restrictions, Could it be the VVT-i ?
My 1-2 shift is long(ish) but the other gear changes are OK. At only 78 K miles, the engine doesn't have the scoot it did when new. This RX used to really move well. Now, it just kind of loafs around.
When the engine is just started/cold, and putting the shifter into drive, the 1-2 shift is really drawn out and then very, very smoothly(like a rubber band in slow motion) shifts into 2nd gear. I may be exagerating this a bit to make a point. And it does get better when the engine is warmed up. But after each stop(stop light/stop sign) and taking off again, the 1-2 shift is always longish. Not crisp shifting as with WOT.
The seat of the pants feel that I experience is similar to watching an air bag test in slow motion. Nothing is harsh and the tranny never BANGS into gear. It's just kinda Blaaaaaah! Always been this way. Well, after warranty anyway!
Another area that I feel that the engine is lacking power is, on the hiwy. When cruising @ hiwy spds, and doing a WOT downshift, although the engine is smooth and the tranny is resopnsive, there just seems to be little power/speed as there once was. It's just kinda...smooth/quiet engine, nice rev, responsive downshift from the tranny to 3rd or 2nd gear and not much passing power as though the engine isn't breathing well like when a person takes a Deeeeeep Breath.
Yes, my airfilter is clean and there are no restrictions, Could it be the VVT-i ?
Nothing is ever as good as it is new, but I will take the RX300 and its few issues that I encounter over a lot of other horror stories that I have heard with other vehicles.
06-11-12, 09:19 AM
#25
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This sounds like what happened to me when I forgot to attach the ground cable. The RX would go into 3rd only after the rpms reached around 4k, and then it would slam into gear.
I suggest you talk to the mechanic, and see if he can find a ground cable that he may have forgotten to re-attach.
I suggest you talk to the mechanic, and see if he can find a ground cable that he may have forgotten to re-attach.
Perhaps this ground has been missing/broken since the first transmission.
Very cool. Whats your best et?
06-11-12, 01:49 PM
#26
Super Moderator
Well, it was at high altitude, about 7400 feet in Mexico City and a 17.931, but the first few times I ran my RX300 stock and it ran between 19.2 to 19.6
06-11-12, 02:10 PM
#27
Yes, I have been using higher octane(typicaly 91/93) depending on the station.
Believe it or not, the engine feels a bit more snappy on lower octane especily 89 octane and my MPG is the(most recently) best on the 89 and then 93 is 2nd best and the 87 is the(if you want to call it bad), the worst!
But overall the engine is smooth/quiet w/ decent MPG and well, SNAPPY is about all I can call the extra giddy-up.
Typicaly I feel no differences with the different octanes wheather I'm cruising or nailing the throttle.
06-12-12, 05:01 AM
#29
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06-12-12, 06:46 AM
#30
Lexus Champion
I don't do it anymore. One major reason is that we don't have a 1/4 mile strip here (have to go to West Palm), but 1/8 mile tracks here don't do justice to the RX300's better upper end.
Good ole variable valve timing! You can really feel it on the highway.
Good ole variable valve timing!
You can really feel it on the highway.
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