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Discussion Starter · #1 ·
It seems that some small annoyances with transmission on '06 highlander
lessen or go away when i disable TRAC and OD ?

Is this possible ? anyone experience these problems ?

The symptoms are hard to reproduce reliably so i have not been able to show
Dealer, they look and Dealer says they reset ECT and no apparent problem but
who knows what they did if anything ?

Probs that seem to disappear :
1. Slight pause (lag) accelerating from dead stop
2. Surge or lunge, when accelerate a little from stop (to 15-20mph) then
press brake slightly to slow down then comes a noticeable lunge/surge (feels
like sonmeone shoved you)
3. Some ker-clunking and car shutters a bit, when shifting P->R and R->D

Thanks for any helpful replies
robb
 
G

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Discussion Starter · #2 ·
"Rob B" <[email protected]> wrote in message
news:[email protected]
> It seems that some small annoyances with transmission on '06 highlander
> lessen or go away when i disable TRAC and OD ?
>
> Is this possible ? anyone experience these problems ?
>
> The symptoms are hard to reproduce reliably so i have not been able to
> show
> Dealer, they look and Dealer says they reset ECT and no apparent problem
> but
> who knows what they did if anything ?
>
> Probs that seem to disappear :
> 1. Slight pause (lag) accelerating from dead stop
> 2. Surge or lunge, when accelerate a little from stop (to 15-20mph) then
> press brake slightly to slow down then comes a noticeable lunge/surge
> (feels
> like sonmeone shoved you)
> 3. Some ker-clunking and car shutters a bit, when shifting P->R and R->D
>
> Thanks for any helpful replies
> robb
>


I believe the Highlander has a transmission that "learns" the operator's
driving style. Certain driving styles confuse the ECT, causing the symptoms
you're describing. I believe there is a service bulletin available to
Toyota dealers that addresses the condition. If the service bulletin
applies and they re-program your ECU, you should drive it hard for several
weeks so that it learns a different driving style than your normal one.
--
Ray O
correct the return address punctuation to reply
 
G

·
Discussion Starter · #3 ·
"Rob B" <[email protected]> wrote in message
news:[email protected]
> It seems that some small annoyances with transmission on '06 highlander
> lessen or go away when i disable TRAC and OD ?
>
> Is this possible ? anyone experience these problems ?
>
> The symptoms are hard to reproduce reliably so i have not been able to
> show
> Dealer, they look and Dealer says they reset ECT and no apparent problem
> but
> who knows what they did if anything ?
>
> Probs that seem to disappear :
> 1. Slight pause (lag) accelerating from dead stop
> 2. Surge or lunge, when accelerate a little from stop (to 15-20mph) then
> press brake slightly to slow down then comes a noticeable lunge/surge
> (feels
> like sonmeone shoved you)
> 3. Some ker-clunking and car shutters a bit, when shifting P->R and R->D
>
> Thanks for any helpful replies
> robb


Sounds like Toy hasn't sorted out its drivetrain problems from previous
years.

Good luck: there ain't no cures in sight.
 
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