Has anyone done this swap? from my understanding, the F has a lower final drive. Is it possible to swap the drive gears in the F pumpkin and use the LSD on an IS350?

 

Yes, IS-F owners have swapped the final drive from an IS350 onto their existing diff. And yes, an IS350 owner has swapped in a '10 Torsen LSD using his final drive too. The IS-F '08 - '09 diffs are open diffs, while the +'10 are a true LSD. All can be swapped rather easily acutally; the hard part is finding an LSD from a wrecked IS-F.

 

Yup, and buying a brand-new OEM LSD will be big $$:

https://www.clublexus.com/forums/5093942-post36.html

 

OP, if you want to know more about a true LSD in our IS350, ask Red ^ here.

 

These two threads might be of use if you still plan on getting the IS-F LSD:

https://www.clublexus.com/forums/is-...eted-pics.html

https://www.clublexus.com/forums/is-...08-09-isf.html

 

Cool, thanks for the info. I found one, any write ups on changing the final drive?

 

Sorry, I couldn't find any related threads from the ones that I saved during my research.

 

What model yr IS-F?

Red had his installed by the well-know Titan Motorsports shop in FL. As far the specifics of the swap itself, it's pretty straight-forward phyiscally; my only concern would finding the right factory torque specs and shim clearances to use.

Where in GA are you located? I've seen a couple 2IS models and an IS-F being parted out in a parts yard around the Laurenceville, GA area according to their postings on Ebay. I asked them once if they had any IS-F +'10 diffs in stock...and of course they said no.

 

Not sure of the model year, I found it by the part number. It's at a breaker in Canada. I'm actually pretty near Lawrenceville.

 

part number is Part # 41110-53270

 

^That P/N only appears to be the P/N for the non-LSD '08-'09 IS-F diff :

http://www.lexuspartsnow.com/parts/l...110-53270.html

It is basically the same thing that is in the IS350 currently, except the final drive gear ratio is lower...meaning less acceleration through all gears (aka, slower). If there is a "diff pin" in the axle input hole, it's a non-LSD diff.



The above is an example and not an actual Lexus diff.

 

Here's the ebay seller that appears to deal specifically in Lexus 2IS and IS-F related parts :

http://www.ebay.com/usr/wantparts94

Here's another actually I've saved in the past that has dealt with some Lexus parts :

http://www.ebay.com/usr/starkonvm

Since you're so close, I'd ask for their address and make a visit.

 

Well, poop, I'll check them out, thanks for the input.

 

Actual IS350 non-lsd pics if anyone needs them down the road. So basically if you see the "diff pin" in the middle of the unit there, it's an open diff.

 

I am going from 3.13 to 3.77 on a 2020 IS350 F
Good thing is a 2022 will bolt right in
Just have to redo my tune Anyone that has a spec sheet with shift points please share