F8X M3/M4 CF Drive shaft mod

[RazorM]

For the guys wondering if it will work with smg, it does decent amount of clearance on the giubo side. I opted for a HD giubo hopefully it’s enough to reduce flex /movement on the trans side. Diff will needs to move back 10ish mm to install the shaft. I’ll report back with a road test when the salt washes away in the spring.

Total cost around $1100 CAD so $250 usd or $150 euro🤣🤣🤣

Thank you very much for the info did you use SMG driveshaft flanges from your OEM driveshaft?

There should be difference between SMG and non SMG driveshaft flanges because of actuator if am not mistaken.

[EthanolTurbo]

Sounds like the wife is sleeping on the couch this weekend...lol..does she know how many people in this forum she's disappointed?

Her response was "if you really wanted it, you should've gone and got it!" It was my fault because I should've told her to go there first and not after appointment. 🙁

[Corradoloco]

For the guys wondering if it will work with smg, it does decent amount of clearance on the giubo side. I opted for a HD giubo hopefully it’s enough to reduce flex /movement on the trans side. Diff will needs to move back 10ish mm to install the shaft. I’ll report back with a road test when the salt washes away in the spring.

Total cost around $1100 CAD so $250 usd or $150 euro🤣🤣🤣

[bigjae46]

Not sure tbh.

As for weights, sorry guys. My wife wasn't able to pick it up on Friday when she was nearby so I won't be able to pick it up and weigh it until Monday. Will update the thread as soon as I can.

Sounds like the wife is sleeping on the couch this weekend...lol..does she know how many people in this forum she's disappointed?

[EthanolTurbo]

did you left front f8x extending, which allows easier install? i think this thing can add some weight, and config without it would be lighter.

Not sure tbh.

As for weights, sorry guys. My wife wasn't able to pick it up on Friday when she was nearby so I won't be able to pick it up and weigh it until Monday. Will update the thread as soon as I can.

[RazorM]

Also cant wait for the measured weight difference. Already ordered a shaft that i found locally for 160 could not resist

EthanolTurbo seems to have already done the job. Have you taken weight measurement already?

[discoelk]

Does anyone have converted weights yet?

[Slonik]

Update: carbon driveshaft has been successfully completed. Will be picking it up tomorrow and weighing it. I should have driving impressions in the next few days.

did you left front f8x extending, which allows easier install? i think this thing can add some weight, and config without it would be lighter.

[SliM3]

F8x driveshafts have metal end where the oe flanges are welded from the factory anyway so this is pretty straightforward procedure of cutting off oe flange and welding e46 flange back on to appropriate length then balance the driveshaft, also the f8x oe driveshaft has balance weights attached to the metal end pieces of the shaft therefore no need to mess with any part of the carbon material of the oe driveshaft.


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You don't even need to hack-up your stock drive shaft. The weld-on splined stub and tri flange can be sourced separately, per Ethanols post above.

I'm going a different route than the traditional guibo/tri flange but purchased the weld-on splined stub and a weld-on 1350 yoke.


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[SliM3]

IIRC there was a recall on those.

Disregard, didnt to post this.
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[Radekxpl]

What are they welding to? Or do they bond an insert to the carbon and weld to that?

F8x driveshafts have metal end where the oe flanges are welded from the factory anyway so this is pretty straightforward procedure of cutting off oe flange and welding e46 flange back on to appropriate length then balance the driveshaft, also the f8x oe driveshaft has balance weights attached to the metal end pieces of the shaft therefore no need to mess with any part of the carbon material of the oe driveshaft.


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[bigjae46]

Interesting.

Back in 2015, S55's were snapping these things so BMW went back to metal driveshafts lol.

I took my DSS CF one out because it wasn't balanced correct, if anyone has this finally installed, I'd like to know who you used and if they would do it for all of us.

IIRC there was a recall on those.

I might do this for my E9X M3. I have an account with a rebuilder. Not sure if this is their thing but I'll have to ask. This place will turn around a metal DS overnight so they should be relatively quick.

[bigjae46]

Here's the invoice for parts and labor for everyone to check out and refer to.

What are they welding to? Or do they bond an insert to the carbon and weld to that?

[0-60motorsports]

Glad I got one of the ones for $170 😅, are we starting a Game Stop trend 🤣😂


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Lucky!!

[Radekxpl]

Just took a peek eBay. Used carbon f8X Driveshafts seem to have gone up in price already 🤣

Glad I got one of the ones for $170 😅, are we starting a Game Stop trend 🤣😂


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