Originally Posted by lobuxracer

This is just too weird. It seems like this is always what happens - someone gets to the point of installation, then 'poof' they're gone. This thread is cursed I think.

Originally Posted by RRocket

We're rooting for you!

Originally Posted by 1sFTW

Thanks, I’m rootin for my damn self at this point. Had to take a break lol she’s still on there and I’ve done a few different techniques in the articles lobux provided and still no dice. Send help

Originally Posted by 1sFTW

I’ve got left and right both “popped”. I’ve broken everything loose and tried dropping it just a little to pry the rest and the furthest she has gotten are the splines on the axle. Right now I’m putting the diff back up and putting bolts back to try and pry them all the way out again. I’m playing with different angles and I’m not having much luck.

Originally Posted by mike33

I supposed if you had to you could unbolt the lower control, sway bar link and #1 arm assembly to pivot the lower arm and axle out of the diff,
but that should not be necessary.

Originally Posted by 1sFTW

If I had one more set of hands this thing would have been done. Right now, with only me working on it, my best bet is to start some disassembly of the suspension. I’ve only gotten everything broken loose, I don’t have a control arm puller/ remover to pop the arms out. Hitting it with a hammer and they’re not budging. But yeah, I’ve realized I need to drop it as much as possible. I’m going to resume tomorrow, got some stuff to do tonight!

Originally Posted by 1sFTW

Seems like the general consensus is that the IS350 differential is too aggressive for the ISF. So, I have on order a GS350 rear differential carrier assembly. Through searching on this forum, someone did a direct swap with the IS350 diff on a GS350, so my thoughts are if that is a direct fit, GS350 to ISF in theory is a direct fit. GS350 diff is 3.679 vs the ISF 2.973. If anyone is interested and would like me to start a new thread outlying my thoughts on this once I get it installed, let me know. I'm set to receive the carrier on 5/9/2019 (according to fedex tracking). I should be able to get to the install Friday evening if not this Thursday, I only have one set of hands though , no one I know is a "car guy/gal" around me. I'll test responsiveness in manual and auto throughout the city and I'll go to some back roads to simulate highway speeds and of course, do some WOT. These are my initial thoughts using rpm/mph calculators on dragtimes.com and analyzing what I will be at in the city... I usually shift around 2400 rpm for city driving until I am at a cruising speed which is 45 in G8 at 1200rpm (usually downshifts me to G7 if I dip under 45) or 60 in G8 at 1600rpm. So at 2400rpm until that, my MPH from G1-G4 is 13.6, 22.95, 33.55, 42.7. If I stay with the same driving style, I will need G1-G5 10.99, 18.54, 27.11, 34.5, 41.03. 45 in G8 at ~1500rpm or 60 in G8 at ~2000rpm. As you can tell, I am bored, sorry for the ramble!

Originally Posted by tas02

Do you have any "before" quarter or eighth mile drag timeslips with which to document the actual change this will make to the performance of your car?

Originally Posted by lobuxracer

That's where I ended up too. The only suggestion is you might be able to do one side at a time instead of both at the same time. Not sure how much height you have to work with though. I believe those who have been able to do this without disassembling the suspension had the car up on a lift with lots of room to drop the diff. If you're on 24" jackstands, I don't think you can get the diff low enough from the chassis, which is why I ended up disassembling a whole bunch of rear suspension bits.