My final gear swap project - Page 8 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

SportInjected · 10-17-2013, 10:22 PM

Quote:

Originally Posted by uncivilised

Thanks for this guide,

Trying to find a spare 86 lsd carrier for a decent price was difficult. As soon as you mention 86 the price is in the thousands lol

So true! Even the prices for LSD is300 diffs are going up, now that people know that they are interchangable. I'm glad I got mine before just in time.

PantsDants · 10-17-2013, 11:58 PM

Carriers out of RWD IS250's are supposed to work as well, but I don't know the specifics about which ones are limited slip.

PantsDants · 10-18-2013, 01:46 AM

Oh, and if any of you guys are interested in buying my leftover parts, I've got the 3.9 ring and pinion for sale now, and my full stock carrier will be as well a few weeks down the road once I've verified my setup.

Unicorn · 10-18-2013, 01:56 AM

What kind of LSD is in the Lexus units though? I'd expect the diff in the 86 was specified to give the car some of it's driving characteristics.

PantsDants · 10-18-2013, 02:04 AM

Quote:

Originally Posted by Unicorn

What kind of LSD is in the Lexus units though? I'd expect the diff in the 86 was specified to give the car some of it's driving characteristics.

According to @Jeff Lange and a few other posts on some Lexus forums, it's a T2 Torsen. You can even see here that T2 is stamped on the top of the carrier: http://www.clublexus.com/forums/is-s...orsen-lsd.html

I'm aware there could be differences in specs (bias ratio perhaps) but they should work the same internally.

Jeff Lange · 10-19-2013, 04:16 AM

Quote:

Originally Posted by PantsDants

Carriers out of RWD IS250's are supposed to work as well, but I don't know the specifics about which ones are limited slip.

None of them.

Quote:

Originally Posted by Unicorn

What kind of LSD is in the Lexus units though? I'd expect the diff in the 86 was specified to give the car some of it's driving characteristics.

The Lexus units use the exact same LSD as the FR-S/BRZ. Same part number.

Jeff

PantsDants · 10-31-2013, 07:16 AM

So since I've hit the 500 mile mark on my gears I've been able to play around a bit. The car is noticeably quicker to accelerate, full stop. I still haven't tried anything from a dig yet. MPG seems relatively unaffected (my commute is mostly city so it's crap anyway, like 25 tops). Probably the most useful thing for daily driving I've noticed thus far is on arterials (like 35-40 mph), a single downshift (as opposed to the balls-out two gear drop you get when you floor it in auto mode) actually gets you going, whereas before you really had to go whole hog with it.

I've yet to actually quantify any of the perceived improvements, but I received some excellent third party feedback. My girlfriend, who drives my car every once in a while (read: after the bars when I've had a few too many) had to drive it while we were helping a friend move. The first thing out of her mouth after she got back was this: "So I understand that gear thing you did on your car now."

mid_life_crisis · 10-31-2013, 05:01 PM

I found a local shop with a dyno (did not ask what kind) and the guy appears to have a good reputation, especially with the S2000 crowd. We discussed options for waking the car up (I have an auto as well) and he stated categorically that if you don't go FI, this is the best other option for waking the car up, followed by a tune. His recommendation was "about 4.5" for street use.

8686 · 10-31-2013, 05:21 PM

Quote:

Originally Posted by mid_life_crisis

I found a local shop with a dyno (did not ask what kind) and the guy appears to have a good reputation, especially with the S2000 crowd. We discussed options for waking the car up (I have an auto as well) and he stated categorically that if you don't go FI, this is the best other option for waking the car up, followed by a tune. His recommendation was "about 4.5" for street use.

After having the 4.5 I can say that 1st 2nd and 3rd shift almost identical to a MT speed which is good in city driving. On the other hand, the difference is much less felt in 4th, 5th and 6th.

I wish I can spare another diff with 4.9 and see the difference.

SportInjected · 10-31-2013, 09:57 PM

Did you sell the stock one already? Otherwise, put the 4.9 in there.

Superstar · 11-23-2013, 08:43 PM

Are any of you auto guys having issues with downshifting and rev matching? Any issues with the software?

SpeedR · 12-15-2013, 05:03 PM

Thanks for all of the great information

mike_ekim1024 · 12-15-2013, 05:11 PM

Quote:

Originally Posted by 8686

After having the 4.5 I can say that 1st 2nd and 3rd shift almost identical to a MT speed which is good in city driving. On the other hand, the difference is much less felt in 4th, 5th and 6th.

I wish I can spare another diff with 4.9 and see the difference.

Do you autocross at all? How does it feel when driving spiritedly? I can't wait to get mine put in

8686 · 12-15-2013, 07:15 PM

Quote:

Originally Posted by mike_ekim1024

Do you autocross at all? How does it feel when driving spiritedly? I can't wait to get mine put in

I dont do autocross. I am all about spirited driving. It feel more responsive specially in lower gears.

10-31-2013, 05:01 PM	#106
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)	I found a local shop with a dyno (did not ask what kind) and the guy appears to have a good reputation, especially with the S2000 crowd. We discussed options for waking the car up (I have an auto as well) and he stated categorically that if you don't go FI, this is the best other option for waking the car up, followed by a tune. His recommendation was "about 4.5" for street use. __________________ 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."

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10-17-2013, 11:58 PM	#100
PantsDants Senior Member Join Date: Jul 2013 Drives: Scion FR-S A/T, Whiteout Location: Seattle Posts: 334 Thanks: 57 Thanked 221 Times in 90 Posts Mentioned: 16 Post(s) Tagged: 2 Thread(s)	Carriers out of RWD IS250's are supposed to work as well, but I don't know the specifics about which ones are limited slip.

10-18-2013, 01:46 AM	#101
PantsDants Senior Member Join Date: Jul 2013 Drives: Scion FR-S A/T, Whiteout Location: Seattle Posts: 334 Thanks: 57 Thanked 221 Times in 90 Posts Mentioned: 16 Post(s) Tagged: 2 Thread(s)	Oh, and if any of you guys are interested in buying my leftover parts, I've got the 3.9 ring and pinion for sale now, and my full stock carrier will be as well a few weeks down the road once I've verified my setup.

10-18-2013, 01:56 AM	#102
Unicorn Banned Join Date: Oct 2013 Drives: GT86 Location: Over The Rainbow Posts: 40 Thanks: 1 Thanked 27 Times in 16 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	What kind of LSD is in the Lexus units though? I'd expect the diff in the 86 was specified to give the car some of it's driving characteristics.

10-31-2013, 07:16 AM	#105
PantsDants Senior Member Join Date: Jul 2013 Drives: Scion FR-S A/T, Whiteout Location: Seattle Posts: 334 Thanks: 57 Thanked 221 Times in 90 Posts Mentioned: 16 Post(s) Tagged: 2 Thread(s)	So since I've hit the 500 mile mark on my gears I've been able to play around a bit. The car is noticeably quicker to accelerate, full stop. I still haven't tried anything from a dig yet. MPG seems relatively unaffected (my commute is mostly city so it's crap anyway, like 25 tops). Probably the most useful thing for daily driving I've noticed thus far is on arterials (like 35-40 mph), a single downshift (as opposed to the balls-out two gear drop you get when you floor it in auto mode) actually gets you going, whereas before you really had to go whole hog with it. I've yet to actually quantify any of the perceived improvements, but I received some excellent third party feedback. My girlfriend, who drives my car every once in a while (read: after the bars when I've had a few too many) had to drive it while we were helping a friend move. The first thing out of her mouth after she got back was this: "So I understand that gear thing you did on your car now."

11-23-2013, 08:43 PM	#109
Superstar Senior Member Join Date: Jul 2013 Drives: Honda Location: Bay Area Posts: 104 Thanks: 37 Thanked 29 Times in 17 Posts Mentioned: 2 Post(s) Tagged: 1 Thread(s)	Are any of you auto guys having issues with downshifting and rev matching? Any issues with the software?

12-15-2013, 05:03 PM	#110
SpeedR First86 / boat thief Join Date: Jan 2012 Drives: MKIV Supra Location: OKC Posts: 306 Thanks: 147 Thanked 119 Times in 43 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Thanks for all of the great information

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