Rear end swap feeler poll - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

mid_life_crisis · 11-07-2014, 08:01 AM

It appears to be widely accepted that short of going FI, the single best mod to wake this car up (especially the A/T) is to swap out the rear gears.
The problem is, that while many of us have no problem with swapping the pumpkin, cracking it open is kind of scary and we don't know what local shop can be trusted.
So I got to wondering if a reputable shop could do exchanges with a core charge. There should be enough units in wrecking yards by now to come up with a few rebuildable cores to get started with. So here's the poll. Maybe if enough guys are interested, some shop with a good rep will try it.

SportInjected · 11-07-2014, 09:29 AM

Quote:

Originally Posted by mid_life_crisis

There should be enough units in wrecking yards by now to come up with a few rebuildable cores to get started with.

In addition to that: the is300 rear diff bolts right up as well (just have to remove the axle stubs). Just have to find one with the torsen installed.

mid_life_crisis · 11-10-2014, 08:03 PM

200 views and only 7 opinions?

Reaper · 11-10-2014, 08:12 PM

Just drop in a is 300 rear end. shipping a core back and forth would negate any money saved versus taking it to a local shop.

kodyo · 11-10-2014, 11:12 PM

You can't just drop in an is300 diff and get better performance in an NA car. Quite the opposite, it will feel slower.

You'd want to go with a 4.56 or higher gear ratio (4.1 ratio in stock diff) to feel the performance. Not the 3.7/3.9 that is in the IS300, completely wrong direction.

I did the gear swap myself, but if I didn't want to try it, I'd definitely trust a local reputable shop with swapping the diff gears. Shipping that thing would not be an option, it probably weighs 80-100 lbs. No thanks on that.

Reaper · 11-10-2014, 11:29 PM

Ah yes. I wasn't thinking about the "just short of going fi" part of OPs post. I am turbo and want a is 300 rear dif for the gear.

View Poll Results: Would you get rear gears done by a core exchange?
Absolutely. How long to get my choice of gears delivered?	4	36.36%
No thanks. I prefer this be done locally.	3	27.27%
Good idea but my money is going elsewhere (like FI)	4	36.36%
Voters: 11. You may not vote on this poll

11-07-2014, 08:01 AM	#1
mid_life_crisis Senior Member Join Date: May 2013 Drives: FR-S 10 #103 AT Location: NC Posts: 1,519 Thanks: 101 Thanked 599 Times in 347 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Rear end swap feeler poll It appears to be widely accepted that short of going FI, the single best mod to wake this car up (especially the A/T) is to swap out the rear gears. The problem is, that while many of us have no problem with swapping the pumpkin, cracking it open is kind of scary and we don't know what local shop can be trusted. So I got to wondering if a reputable shop could do exchanges with a core charge. There should be enough units in wrecking yards by now to come up with a few rebuildable cores to get started with. So here's the poll. Maybe if enough guys are interested, some shop with a good rep will try it. __________________ Necessity may be the mother of Invention but Desperation is quite often the father. “Sex is like Bridge. If you don't have a good partner, you'd better have a good hand.” - Mae West Papa said, "son there's a lot of evil temptations out there. Best to try 'em all so you know which ones to avoid."

11-10-2014, 08:12 PM	#4
Reaper in orbe terrum non visi Join Date: Jan 2014 Drives: violent Location: Mountains Posts: 1,747 Thanks: 279 Thanked 762 Times in 446 Posts Mentioned: 62 Post(s) Tagged: 1 Thread(s)	Just drop in a is 300 rear end. shipping a core back and forth would negate any money saved versus taking it to a local shop. __________________ I have E85 where there isn't E85, that's my secret. http://www.ft86club.com/forums/showt...t=reaper+build

11-10-2014, 11:29 PM	#6
Reaper in orbe terrum non visi Join Date: Jan 2014 Drives: violent Location: Mountains Posts: 1,747 Thanks: 279 Thanked 762 Times in 446 Posts Mentioned: 62 Post(s) Tagged: 1 Thread(s)	Ah yes. I wasn't thinking about the "just short of going fi" part of OPs post. I am turbo and want a is 300 rear dif for the gear. __________________ I have E85 where there isn't E85, that's my secret. http://www.ft86club.com/forums/showt...t=reaper+build

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11-10-2014, 08:03 PM	#3
mid_life_crisis Senior Member Join Date: May 2013 Drives: FR-S 10 #103 AT Location: NC Posts: 1,519 Thanks: 101 Thanked 599 Times in 347 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	200 views and only 7 opinions?

11-10-2014, 11:12 PM	#5
kodyo Senior Member Join Date: Jan 2013 Drives: Scion FR-S Location: Los Angeles Posts: 686 Thanks: 597 Thanked 257 Times in 174 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	You can't just drop in an is300 diff and get better performance in an NA car. Quite the opposite, it will feel slower. You'd want to go with a 4.56 or higher gear ratio (4.1 ratio in stock diff) to feel the performance. Not the 3.7/3.9 that is in the IS300, completely wrong direction. I did the gear swap myself, but if I didn't want to try it, I'd definitely trust a local reputable shop with swapping the diff gears. Shipping that thing would not be an option, it probably weighs 80-100 lbs. No thanks on that.

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