bacardi11

iTrader: (1)

Just did a Trans. Service 75k at my friend shop filter ect. also the pressure mod. on the driver side there is button you push in and turn to the right from soft, med, firm this will increase pressure for shifts. I set it to firm. shifts are nice no lag. lexus use the soft setting.

ShawnOk

iTrader: (1)

Wow, really? Are you saying the trans pressure can be modified? Can you maybe take a photo of this button and it's location?

bacardi11

iTrader: (1)

Shawn
yes really, yes trans pressure can be modified. You must have the pan down. Driver side trans pressure button lexus sets it on soft push in the button turn to the right all the way it will stop that will be firm change filter i use beck-arney much better made and gasket 49.00 shipped. JC W

StillLine

For your reading pleasure ↓

How to modify trans pressure in your SC430 5-speed.

Now, I want to know if this is possible on the 6-speed tranny in my '06?

ShawnOk

iTrader: (1)

Oh, so you're saying you can only change the pressure during a transmission fluid flush/change? No way to change it without service?

bacardi11

iTrader: (1)

drop pan push button in turn to the right set on firm done.
my friends shop told me about this he was right.

bacardi11

iTrader: (1)

stilline
that pressure button should be on all trans. this will increase line pressure.

bacardi11

iTrader: (1)

I can see the difference when I go from park to drive quick and solid. not harsh nice. it works
the button is on the drivers side of the valve body. this will increase line pressure.

ShawnOk

iTrader: (1)

Was at my local Lexus dealer and spoke with the head tech and he's never heard of this transmission pressure modification. He's willing to take it on, though. He's excited as he has a LS (430 or 460?) with the same a-650-e transmission, and he wants to try it on his car or so he says. I supplied whatever information I've gathered from this thread and the linked threads, also. I'm thinking of going to my private shop as they've done really good by me so far and I'm planning on having the sway bars added so the car will be on the rack anyway. Two birds, one stone.. hopefully the techs will cut me a deal.

Oh and additionally while at Lexus, there was a coupon for a showroom detail (clay bar, shampoo, leather treatment, etc) for $159. I need a detail but this might be a little out of my budget depending on the results of these estimates. :-( But some good news... if you sign up for your local Lexus dealership via their website, as I did, you get a 15% off card up to $500. Here's the link to mine.

http://www.mcgrathlex.com/ViewSpecia...01304527915698
http://www.mcgrathlex.com/Savings-Card-Sign-Up

bacardi11

iTrader: (1)

shawn
your on the ball see even the tech did not know about this mod. they also learn something about this mod. you also increase the trans. life. I have 75k on this trans.

jmezo

Will this help the lag issue? I don't always get the lag but I find my self driving my 03 in 4th gear when driving in the city.

bacardi11

iTrader: (1)

jmezo
I would not know because I been using a sprint boost in my car for years. I don't have a lag.

LexBrett

Bacardi11,
Do you just stick a flat head screwdriver in there and turn right, per the diagram? Didn't somebody post an actual pic of the dial a while back? I cannot find it?

tennman117

Here is a pic of the screw you turn in the "firm" position posted by irokdastar.

bacardi11

iTrader: (1)

lex
yes flathead