Cfauvel

On 6/14/2021 at 2:03 PM, JGrantIS350 said:

I've owned my 007 Lexus IS350 for just over three years now. I got it with 101K. Today is 06/14/2021. my car is in the shop as I type this post with 152,760 for a transmission pan drop and screen/filter replacment service. I was allowed to drop off all Lexus OEM parts needed to complete this service. I'm not having any issues with my transmission thus far! That I know of...

The car is far from stock I must say. there are several after market proforamance parts on this car. (Almost Track Ready)

Pan Gasket 3516860010

Filter/Strainer 3533050020

 Filter/Screen rubber O Ring 

1X.   9030131014

Crush washer X2 one for the drain and one for fill plug.

(WS) World standard 6X quarts 00289ATFWS

I was told by a highly known engine builder in NASCAR that the shop is highly recormended with Toyota/Lexus cars. To the best of my knowalge a service has never been done on this transmission.

I've also heard the horror stories behind doing a drain and fill at this milage.  I left the shop feeling i did the right thing.  Only time will tell. I surplied a small glass Jar to get a sample of the olf fluid.

Id like to see the PDF but it says its no longer available. 

Jeff Grant Mooresville NC USA

Are the transmissions in the IS250 and IS350 the same? As in , are the parts listed the same for the IS250?

P0303 means a misfire on cyl 3. I'm new to any Lexus IS250, so you'll have to find a cylinder number diagram to find out which side and what location the #3 cyl is .

The misfire can be a host of things, but a few of the usual suspects are 

Spark Plug (doubt it)

Coil (most probable)

Injector 

The easiest thing to do is to clear out the codes and move coil #2 to position #3 (and vice-versa) and see if the PO3xx moves to P0302....If it does that means the coil is bad.
I highly recommend to getting an OEM coil or high-performance coil as some aftermarket coils jus don't cut it.

Report back after that test.