New owner here

[Jack90210]

Pardon me if this is redundant, but as you are new to this vehicle I want to stress this one fact:

Cooling system failures are far and away the #1 killer of these vehicles/motors, and there is almost no warning for a failure that happens at speed.

I realize that your radiator was replaced in 2018, but I would monitor the vehicle for any change in coolant levels (once it stabilizes after being burped etc.) to make sure that there are no hidden leaks or problems. I would also recommend a full-system hose/clamp replacement sometime in the next few years, given the age of the vehicle and the high consequences for failure.

Welcome and good job going through the vehicle, I love seeing these beasts on the road.

 

[Vthelexus]

It's great you're flushing all fluids. Since the case is, with any used vehicle. We've no idea, as to what fluids has been added (mixed in) by PO's. Even if only Toyota or Lexus shop maintained.


ATF:

FWIW: Toyota TSB, which lowered AT Fluid temp, used to set ATF level. To: AT #1: 97f to 115f.
One of the issues using other than Toyota WS, is variation in heat expansion.
Toyota found they had underfilled 2004 thru 2007 100 series. I find, AT that have never been set properly, are about 1/2 qt. low. Before this TSB, was a low speed shutter TSB. They first replaced these AT, then came out with a kit to be installed. Final correction, was this ATF temp TSB.

I have tried other ATF's, in the 04-up. But recently I've gone back to only Toyota WS. I've seen, a very few have AT issues. When other than Toy WS ATF used. Than switch back to Toy WS ATF, issues was corrected. Aisin WS may be the same as Toy WS ATF. But as of I yet, I know of no chemical engine or oil analysis, that has confirmed.

Brake fluid:

Toyota had a recall on certain 2005 thru 2007 model (not 100 series) brake masters. They found that topping off with, off-the-shelf DOT II or III brake fluid. Resulted in seal failures in the brake master. We learned from this TSB. Toyota brake seals (rubber) is paired to the their special heavy brake fluid with its package of seal conditioners.

I've found using Toyota brake fluid. Often reduces time to charge accumulator (booster motor run time).

Just to be overly protective of our brake systems seals and reduce booster motor run time. About 5 years ago. I adopted the use of only; Toyota brake fluid to flush systems.

I also try to stick with OE products as much as possible. Considering that Aisin is an actual maker of transmission, it being a WS and my success using that fluid for over a decade I didn't hesitate. I would never go with any "universal" fluids. From what I could gather on BITOG the only difference in Toyota and Aisin fluids is viscosity, Aisin being slightly more viscous which could probably benefit older vehicle.

Pardon me if this is redundant, but as you are new to this vehicle I want to stress this one fact:

Cooling system failures are far and away the #1 killer of these vehicles/motors, and there is almost no warning for a failure that happens at speed.

I realize that your radiator was replaced in 2018, but I would monitor the vehicle for any change in coolant levels (once it stabilizes after being burped etc.) to make sure that there are no hidden leaks or problems. I would also recommend a full-system hose/clamp replacement sometime in the next few years, given the age of the vehicle and the high consequences for failure.

Welcome and good job going through the vehicle, I love seeing these beasts on the road.

Yes, definitely will be doing that in the near future. The main radiator hoses look pretty fresh. I think they were replaced in 2018 when the radiator was done. I'll start with the Ts and their hoses and clamps first then replace whatever else needs attention. Man, this thing is cash hungry, lol.