How to install cf driveshaft

sti_671 · 09-09-2006, 01:23 AM

im thinking this is going to be my next mod so does anyone have a right up on this? pics?

Muffnbluff · 11-20-2006, 07:12 PM

It's super easy. All you have to do is take off some bolts, slide the old driveshaft out, slide the new one in and put 4 bolts back in. I know, real specific, but all you need is a couple of wrenches.

grim09 · 11-21-2006, 07:03 AM

it is real easy. it will take around 10 min if you have a lift that is accessable and air tools or maybe 30 min if you have to install it on jack stands.

flytojungho · 12-06-2006, 02:01 PM

don't you have to see if the driveshaft is aligned after install?(we have something like the driveshaft on aircraft and we have to do this whenever we switch it out)

**409industries** · 01-10-2007, 02:16 PM

the CF driveshaft install is a piece of cake, i was able to do it in 45 minutes with handtools, a jack w/ jackstands, and a friend to help hold up the the driveshaft.

It is aligned already if it is installed and the bolts line up. The only time consuming part is re tightening the bolts that hold the rear end of the driveshaft in place, disengaging the parking brake, rotating it, and then reengaging the parking brake. PM me if you need more info.

La Mer · 01-10-2007, 02:21 PM

it's simple...

totally self explanatory once you are under the car.

i did it by myself with jackstands and a few tools.

AnorexicSTI · 01-10-2007, 05:13 PM

It's easy, but more like a 45 min. install... not 10 min, even if you have a lift... 10 min with 2 people maybe... but u need to go back and forth like that 1 guy said with the parking brake on and off... furthermore, 2 of the bolts do not line up with the flat edge to prevent them from turning... u need to put a flathead screwdriver in there... that was the one thing that disappointed me... $1000+ product and they got the casting on the yolk wrong... it was minor enough that they didn't bother fixing it... I wonder who in the engineering department was smoking dope when the finished the final CAD drawing...

La Mer · 01-10-2007, 05:54 PM

Quote:

Originally Posted by AnorexicSTI

It's easy, but more like a 45 min. install... not 10 min, even if you have a lift... 10 min with 2 people maybe... but u need to go back and forth like that 1 guy said with the parking brake on and off... furthermore, 2 of the bolts do not line up with the flat edge to prevent them from turning... u need to put a flathead screwdriver in there... that was the one thing that disappointed me... $1000+ product and they got the casting on the yolk wrong... it was minor enough that they didn't bother fixing it... I wonder who in the engineering department was smoking dope when the finished the final CAD drawing...

not directed at ACPT, but you would be surprised as to how many smoke this 'dope' you talk about (assuming it is cannabis).

back in may of 2006 i did not have any problem with the bolts. it mounted just as the stock shaft did.

AnorexicSTI · 01-10-2007, 07:17 PM

Quote:

Originally Posted by La Mer

not directed at ACPT, but you would be surprised as to how many smoke this 'dope' you talk about (assuming it is cannabis).

back in may of 2006 i did not have any problem with the bolts. it mounted just as the stock shaft did.

Did you do the install yourself? You know how on the stock shaft, there are 4 indents? The bolts that go in there are not round, they have a flat side that fits perfectly in the indents. This allows u to just use a wrench to tighten the nut. 2 of them on my ACPT were fine, but the other 2, the flat edge of the bolt was 2 mm away from the flat edge of the ACPT yolk (not sure if that is the right word for it). Anyways, the bolt would just spin and spin because it would not catch on that flat edge... so I had to stick a flathead screwdriver in there which is roughly 2mm thick to take up the gap. Does that make sense?

La Mer · 01-10-2007, 07:24 PM

Quote:

Originally Posted by AnorexicSTI

Did you do the install yourself? You know how on the stock shaft, there are 4 indents? The bolts that go in there are not round, they have a flat side that fits perfectly in the indents. This allows u to just use a wrench to tighten the nut. 2 of them on my ACPT were fine, but the other 2, the flat edge of the bolt was 2 mm away from the flat edge of the ACPT yolk (not sure if that is the right word for it). Anyways, the bolt would just spin and spin because it would not catch on that flat edge... so I had to stick a flathead screwdriver in there which is roughly 2mm thick to take up the gap. Does that make sense?

yessir. that definitely made sense. im completely with ya'. it seems to me that my shaft was made different from the time when yours was produced. all four bolts were held by the 'yolk' while i was on the other end wrenching on the nuts.

ultimately it sound like a batch issue.

AnorexicSTI · 01-10-2007, 07:27 PM

Quote:

Originally Posted by La Mer

yessir. that definitely made sense. im completely with ya'. it seems to me that my shaft was made different from the time when yours was produced. all four bolts were held by the 'yolk' while i was on the other end wrenching on the nuts.

ultimately it sound like a batch issue.

Hmmm... when did you get yours? I got mine from importimage as part of a group buy in September 06 I believe.

La Mer · 01-10-2007, 07:28 PM

Quote:

Originally Posted by AnorexicSTI

Hmmm... when did you get yours? I got mine from importimage as part of a group buy in September 06 I believe.

~ the end of april, beginning of may 2006.

AnorexicSTI · 01-10-2007, 07:57 PM

Quote:

Originally Posted by La Mer

~ the end of april, beginning of may 2006.

Guess I got a bad batch

Thing is... my batch was after yours... just seems weird because I would think that once you get the casting right, it's easy to reproduce again and again... if yours was perfect in April, I don't see how mine in Sept could change that much... I should call ACPT to let them know... maybe they can send me just that part... it unbolts from the main area I think.

Do you get ANY resonant vibrations at all? Mine resonates between 105 and 120 mph... nothing horrible or intolerable, but it's there. I was told that if it was unbalanced, the vibration would get worse, but since it's only within a 15 mph range, it's a resonant frequency...

I have no luck man... I was one of the 6 that got a discombobbled X-brace too... out of everybody, I'm one of the 6...

akinasdevil · 01-10-2007, 09:35 PM

Quote:

Originally Posted by AnorexicSTI

Did you do the install yourself? You know how on the stock shaft, there are 4 indents? The bolts that go in there are not round, they have a flat side that fits perfectly in the indents. This allows u to just use a wrench to tighten the nut. 2 of them on my ACPT were fine, but the other 2, the flat edge of the bolt was 2 mm away from the flat edge of the ACPT yolk (not sure if that is the right word for it). Anyways, the bolt would just spin and spin because it would not catch on that flat edge... so I had to stick a flathead screwdriver in there which is roughly 2mm thick to take up the gap. Does that make sense?

You are not alone, mine was the same way exactly? I think we were part of the same batch. You would think a piece that cost as much as this does would be better engineered than this.

Nico Flax · 03-29-2007, 08:53 AM

Does anyone have the torque specs for the bolts? Im about to do the install, a little worried about this screwdriver thing though...

09-09-2006, 01:23 AM	#1
sti_671 Junior STI Driver Car: P S M S T I Fav Mod: who? Location: Ut Posts: 109 Join Date: Aug 2006 Trader Rating: (0)	How to install cf driveshaft im thinking this is going to be my next mod so does anyone have a right up on this? pics? This ad is not endorsed by this member. Please register or login to hide this ad.

03-29-2007, 08:53 AM	#15
Nico Flax Amateur STI Driver Car: 06 Subaru Impreza WR Fav Mod: Carbon Fiber driveshaft? Location: North VA Posts: 40 Join Date: Jun 2006 Trader Rating: (0)	Does anyone have the torque specs for the bolts? Im about to do the install, a little worried about this screwdriver thing though... This ad is not endorsed by this member. Please register or login to hide this ad.

11-20-2006, 07:12 PM	#2
Muffnbluff DOMINATOR Car: 05 STi OBP Fav Mod: Strut Clunk Location: STL Posts: 5,613 Join Date: May 2005 Trader Rating: (5)	It's super easy. All you have to do is take off some bolts, slide the old driveshaft out, slide the new one in and put 4 bolts back in. I know, real specific, but all you need is a couple of wrenches.

11-21-2006, 07:03 AM	#3
grim09 STI Driver Posts: 277 Join Date: Feb 2006 Trader Rating: (3)	it is real easy. it will take around 10 min if you have a lift that is accessable and air tools or maybe 30 min if you have to install it on jack stands.

12-06-2006, 02:01 PM	#4
flytojungho Spec C Club Car: 06 STI Fav Mod: Prodrive oval tip Location: carmel indiana Posts: 1,277 Join Date: Mar 2005 Trader Rating: (0)	don't you have to see if the driveshaft is aligned after install?(we have something like the driveshaft on aircraft and we have to do this whenever we switch it out)

01-10-2007, 02:16 PM	#5
409industries DirtyImpreza.com Car: 04 STi, 01 RS Fav Mod: ACPT CFDS Location: Southern California Posts: 674 Join Date: Dec 2004 Trader Rating: (3)	the CF driveshaft install is a piece of cake, i was able to do it in 45 minutes with handtools, a jack w/ jackstands, and a friend to help hold up the the driveshaft. It is aligned already if it is installed and the bolts line up. The only time consuming part is re tightening the bolts that hold the rear end of the driveshaft in place, disengaging the parking brake, rotating it, and then reengaging the parking brake. PM me if you need more info.

01-10-2007, 02:21 PM	#6
La Mer NIИja Location: US - Southern California Posts: 38,220 Join Date: Jan 2006 Trader Rating: (5)	it's simple... totally self explanatory once you are under the car. i did it by myself with jackstands and a few tools.

01-10-2007, 05:13 PM	#7
AnorexicSTI Spec C Club Car: 05 WRX STI - Spec A Fav Mod: Starving my STI Location: Lightweightville, Canada Posts: 1,755 Join Date: Sep 2006 Trader Rating: (13)	It's easy, but more like a 45 min. install... not 10 min, even if you have a lift... 10 min with 2 people maybe... but u need to go back and forth like that 1 guy said with the parking brake on and off... furthermore, 2 of the bolts do not line up with the flat edge to prevent them from turning... u need to put a flathead screwdriver in there... that was the one thing that disappointed me... $1000+ product and they got the casting on the yolk wrong... it was minor enough that they didn't bother fixing it... I wonder who in the engineering department was smoking dope when the finished the final CAD drawing...