Is250 Transmission Problem

[LEXUS BD]

Hi All,

I bought an 2008 IS250 2 months ago from lexus dealer in perth. The problem that I am facing is that when I change my gear from N (neutral ) to D (drive) there is a lag. ie It takes couple of sec to change from neutral to drive. Also the same happens when I change from N to R. Is it something very normal ? Or do I have a transmission issue? Should i change the transmission oil ? My car has only done only 62k. Any suggestions would be welcome. Thanks

[I CU2]

Mine doesn't do that - have you taken it to the dealer to get it looked at?

[Tony1234]

I'd recommend a transmision oil change using good quality full synthetic fluid.

[Iggy]

mine also does that and it always did for the lat 5 years....I just assumed its normal...about 1/2 sec delayed response.

[BigDenis]

I'd recommend a transmision oil change using good quality full synthetic fluid.

You can't change the transmission fluid in the IS250.

[E910]

You can't ? I must tell my service guys to stop changing it then :P They take Toyota WS fluid. We change it every 90K. In Japan they call it lifetime fluid but thats only because most sell there cars before they get to 90K. WS is similar in spec to Dexron VI & Mercon LV. It's basically a low viscosity ATF for improved fuel economy over older specs i.e T-IV.

[BigDenis]

You can't ? I must tell my service guys to stop changing it then :P They take Toyota WS fluid. We change it every 90K. In Japan they call it lifetime fluid but thats only because most sell there cars before they get to 90K. WS is similar in spec to Dexron VI & Mercon LV. It's basically a low viscosity ATF for improved fuel economy over older specs i.e T-IV.

You can't, unless you have a part that replaces the heat exchanger built into the side of the transmission - and this is very specialised equipment that had not even been developed until a couple of years ago. Google it.

Edit: you can only change a little at a time, you can't change all the fluid with the abovementioned.

[Iggy]

Acceptable time lag when engaging a gear:

Time lag: N → D less than 1.2 seconds Time lag: N → R less than 1.5 seconds

[LEXUS BD]

I had it checked with the guys in lexus yesterday. They said it is normal to have a lag of 1 sec.

They also said that there is no need to change the transmission fluid as it is sealed and very long lasting.

BMWs Merc & Audis dont have a lag time in changing gear ... even mitsubishi lancer as well

[E910]

Specialist tools? A spanner to undo the drain plug? They only change about 3.5-4L but that is enough to refresh the additive pack in the oil & protect your transmission for another 90K

[BigDenis]

Specialist tools? A spanner to undo the drain plug? They only change about 3.5-4L but that is enough to refresh the additive pack in the oil & protect your transmission for another 90K

Read what "Kurtz" has to say about that method in the following thread: http://www.clublexus.com/forums/is-second-generation/618722-i-had-my-transmission-fluid-changed-at-the-dealer-is350.html

Also here: http://www.clublexus.com/forums/is-second-generation/643544-diy-transmission-fluid-change-question-for-is250.html

Edit: A "full" transmission fluid change on the IS250 is 7.5 litres, and on the IS350 is 7.9 litres.

[ilv1004s]

it is suppose to be sealed for life

but iv drained and changed the whole tranny fluid on my ISF

the whole thing takes around 2 cans of AT fluid

yes it does make a difference

[Tony1234]

it is suppose to be sealed for life

but iv drained and changed the whole tranny fluid on my ISF

the whole thing takes around 2 cans of AT fluid

yes it does make a difference

Ok.So my understanding is you CAN change the ATF in our cars! ilv1004s was it a dificult job?What was involved,any special tools required?