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Dropping rear subframe is actually not that bad ^^; if you have a couple of jacks. Or you can see what a shop wants to do it for you.
But wouldn't you need to drop it completely or just lower a few inches? what about the drive shaft... i didn't see the procedure for the subframe "removal" =)
But wouldn't you need to drop it completely or just lower a few inches? what about the drive shaft... i didn't see the procedure for the subframe "removal" =)
for the purpose of swapping sway bars, i would guess you only need to open up 1 pair of bolts and only loosen the others.. just enough to slide the sway bar off, instead of completely dropping it out. The service manual says to do so because it's the "proper way".
If I was dropping the subframe i'd like to install subframe limiters like they offer for the FR-S. but sadly nobody makes jack for our cars
Are you talking about the Spoon Rigid Collars? Though I don't believe they are available for the 3rd Gen Lexus IS, they are available for the 2nd Gen IS250/350 and IS-F.
I can't say for certain if all/some/none of the collars would be compatible with the newer model though...
The ones I saw were made by Whiteline I think. It would be nice to see measurements of these products to verify if they can be used on 3IS or not. I'm waiting for someone else to be the guinea pig. lol.
The 3IS has way too much rear subframe slop. I can feel it. I'd also like to tighten it up with some RC-F rear lower control arms. Seems they use a balljoint on one end, in addition to being inherently more rigid (and lighter). If I keep this car beyond my lease, I'd want to do some good functional upgrades.
Are you talking about the Spoon Rigid Collars? Though I don't believe they are available for the 3rd Gen Lexus IS, they are available for the 2nd Gen IS250/350 and IS-F.
I can't say for certain if all/some/none of the collars would be compatible with the newer model though...
Functional Chassis Braces will also make a noticeable difference with making the front and rear subframes feel more connected to the chassis (some more than others). Though these apply specifically to the 2nd Gen Lexus IS, I found these two specific braces to make a significant impact with improving rigidity with my car.
Functional Chassis Braces will also make a noticeable difference with making the front and rear subframes feel more connected to the chassis (some more than others). Though these apply specifically to the 2nd Gen Lexus IS, I found these two specific braces to make a significant impact with improving rigidity with my car.
Looks like TRD offers one for 3IS, part# MS300-53001. But it seems to be Japan only.
My BMW came with the middle and front one from the factory. Ties front subframe into the unibody. And the M3 comes w/ something like this rear one. Ties rear subframe.diff carrier to unibody.
Yes. It was me. I fitted the RC350 Fsport rear sway bar to my IS. 3mm difference in diameter compared to the bar the same with my car, and also has a more sophisticated bushing.
Really worthwhile mod. Transforms turn in and moves balance from slightly nose heavy to neutral.
It’s good to know it worked out for you, this is cool.
10-05-16, 07:52 AM
