Stronger driveshaft replacement? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

lapsio · 03-08-2024, 05:22 AM

Hello

I have stock (engine-wise) 2020 BRZ and it seems I have bent driveshaft joints after 3 years of use (possibly leading to transmission leakage which was detected first). Since OEM driveshaft is kinda expensive (around 1500 usd in EU) I'm considering some aftermarket options that wouldn't fail so quickly,

Any suggestions? Is it... I wouldn't say "normal" but within expectations to kill driveshaft on stock BRZ in 3 years? It's driven pretty hard, also on track, using tw80 / tw100 tyres so there may be some slightly increased stress on it coming from increased grip but it shouldn't be too bad I believe... I dunno.

NoHaveMSG · 03-08-2024, 09:30 AM

I’ve never heard of someone killing a stock driveshaft in one of these.

You are limited to the carbon fiber aftermarket options. DSS or PST. I don’t think Verus makes their’s anymore but they used to have one.

The DSS aluminum is not an option for cars seeing over 110mph. @blsfrs had one fail and did a thread on it. DSS admitted the diameter is not enough and the critical speed of the aluminum shaft is too low.

blsfrs · 03-08-2024, 09:50 AM

IMHO: I'd stick with the stock one.

https://www.ft86club.com/forums/showthread.php?t=154478

Ultramaroon · 03-08-2024, 01:28 PM

OP is in Poland.

@lapsio, I agree with others. Stock is the only safe bet. Something very strange must have happened to damage your original.

Grady · 03-08-2024, 06:26 PM

Stock is your best bet. All one piece upgrades will have speed limitations and are more susceptible to physical damage. If your stock got damage my bet it was from hitting something.

blsfrs · 03-09-2024, 10:16 AM

Quote:

Originally Posted by Ultramaroon

OP is in Poland.

@lapsio, I agree with others. Stock is the only safe bet. Something very strange must have happened to damage your original.

According to USPS, shipping a 20lbs item to Poland would be around $220. There might be cheaper options. That's better than $1500 for a nude one.

humfrz · 03-09-2024, 03:53 PM

Do they not have wrecking yards in Poland?

Sapphireho · 03-09-2024, 07:54 PM

I've had my CF one piece up to 120mph a couple times. Smooth as silk.

Grady · 03-09-2024, 10:26 PM

Quote:

Originally Posted by Sapphireho

I've had my CF one piece up to 120mph a couple times. Smooth as silk.

I have a Verus and at 130 it starts to have a harmonic vibration.(it does not vibrate but makes a noise) You can push it past but if you do it repeatedly you are goin to have a catastrophic failure.

Ultramaroon · 03-09-2024, 10:57 PM

Quote:

Originally Posted by blsfrs

According to USPS, shipping a 20lbs item to Poland would be around $220. There might be cheaper options. That's better than $1500 for a nude one.

Oh, hell yes. Good point.

Ultramaroon · 03-09-2024, 10:58 PM

Quote:

Originally Posted by humfrz

Do they not have wrecking yards in Poland?

Also a good point.

...well, question.

Sapphireho · 03-10-2024, 03:10 AM

Quote:

Originally Posted by Grady

I have a Verus and at 130 it starts to have a harmonic vibration.(it does not vibrate but makes a noise) You can push it past but if you do it repeatedly you are goin to have a catastrophic failure.

Mine is DSS.

blsfrs · 03-10-2024, 10:13 AM

Several months ago (in a galaxy far, far away) Didn't someone post about a CF driveshaft failure on their rally car.

Grady · 03-10-2024, 10:38 AM

Quote:

Originally Posted by Sapphireho

Mine is DSS.

Looks like about same diameter, that ones critical speed will be similar.

03-08-2024, 05:22 AM	#1
lapsio Member Join Date: Mar 2021 Drives: 2020 BRZ Final Edition, 1999 MX5 NB Location: Poland Posts: 90 Thanks: 41 Thanked 31 Times in 18 Posts Mentioned: 4 Post(s)	Stronger driveshaft replacement? Hello I have stock (engine-wise) 2020 BRZ and it seems I have bent driveshaft joints after 3 years of use (possibly leading to transmission leakage which was detected first). Since OEM driveshaft is kinda expensive (around 1500 usd in EU) I'm considering some aftermarket options that wouldn't fail so quickly, Any suggestions? Is it... I wouldn't say "normal" but within expectations to kill driveshaft on stock BRZ in 3 years? It's driven pretty hard, also on track, using tw80 / tw100 tyres so there may be some slightly increased stress on it coming from increased grip but it shouldn't be too bad I believe... I dunno. Last edited by lapsio; 03-08-2024 at 05:40 AM.

03-08-2024, 09:30 AM	#2
NoHaveMSG Senior Member Join Date: Jan 2018 Drives: Crapcan Location: Oregon Posts: 11,612 Thanks: 18,894 Thanked 16,899 Times in 7,691 Posts Mentioned: 112 Post(s)	I’ve never heard of someone killing a stock driveshaft in one of these. You are limited to the carbon fiber aftermarket options. DSS or PST. I don’t think Verus makes their’s anymore but they used to have one. The DSS aluminum is not an option for cars seeing over 110mph. @blsfrs had one fail and did a thread on it. DSS admitted the diameter is not enough and the critical speed of the aluminum shaft is too low. __________________ "Experience is the hardest kind of teacher. It gives you the test first and the lesson afterward." -Oscar Wilde.

03-08-2024, 01:28 PM	#4
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,394 Thanks: 53,054 Thanked 37,230 Times in 19,309 Posts Mentioned: 1118 Post(s)	OP is in Poland. @lapsio, I agree with others. Stock is the only safe bet. Something very strange must have happened to damage your original. __________________ service manuals

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03-09-2024, 07:54 PM	#8
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03-10-2024, 10:13 AM	#13
blsfrs Senior Member Join Date: Dec 2018 Drives: 2013 frs base Location: central Virginia Posts: 1,469 Thanks: 2,801 Thanked 1,486 Times in 702 Posts Mentioned: 13 Post(s)	Several months ago (in a galaxy far, far away) Didn't someone post about a CF driveshaft failure on their rally car.

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