Torque tube bushing Qs

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Oct 26, 2008 | 03:42 PM

#21

TDP

Instructor

Joined: Jul 2003

Posts: 173

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From: D/FW TX

Quote:

Originally Posted by WKMCD

I think you will find that the BMW bushings and GM bushings are made by the same German company.

These are the 10mm bushings that came out of my car and were replaced with the BMW busings. As you can clearly see they are "Made in Germany".

Exactly! Here is what I think happened: GM "Borrowed" this design from BMW. It is a part that has already been in production for BMW, so it was probably cheaper for GM to just buy from the same place that BMW gets their couplers made. I have rebuilt several torque tubes and both the GM and BMW parts are identical. I don't believe that one is any stronger than the other.
I have also seen these "made in Germany" couplers in the Pontiac GTO as well as the Cadillac CTS.

Oct 26, 2008 | 05:43 PM

#22

Mike94ZLT1

Le Mans Master

Joined: Jun 2002

Posts: 8,352

Likes: 103

From: In the pit, trying to love someone.

So the regular 6 speed cars in 01 still got the older style, but the 01 Z06's got the newer ones?

Oct 26, 2008 | 06:16 PM

#23

WKMCD

Race Director

Joined: Dec 2004

Posts: 13,760

Likes: 75

From: Haymarket VA

This is old but since I put the BMW bushings in I've slammed over 500RWHP and 470RWT through 315x18 PS2's many many times with no problems.

Last edited by WKMCD; Oct 27, 2008 at 06:50 AM.

Oct 26, 2008 | 07:55 PM

#24

Mike94ZLT1

Le Mans Master

Joined: Jun 2002

Posts: 8,352

Likes: 103

From: In the pit, trying to love someone.

Quote:

Originally Posted by WKMCD

This is olod but since I put the BMW bushings in I've slammed over 500RWHP and 470RWT through 315x18 PS2's many many times with no problems.

Do you have an early or later style tube?

Oct 26, 2008 | 08:55 PM

#25

WKMCD

Race Director

Joined: Dec 2004

Posts: 13,760

Likes: 75

From: Haymarket VA

Quote:

Originally Posted by Mike94ZLT1

Do you have an early or later style tube?

10mm

Oct 27, 2008 | 04:31 AM

#26

Bill Curlee

Tech Contributor

Joined: Dec 1999

Posts: 32,910

Likes: 2,402

From: Anthony TX

CI 6,7,8,9,11 Vet

St. Jude Donor '08

I will be going through this very soon

My drive line need to come out for a clutch.

Bill C

Oct 27, 2008 | 08:11 PM

#27

Melting Slicks

Joined: Nov 1999

Posts: 2,347

Likes: 857

From: MI

Cruise-In VI Veteran

Hello, this info is a bit dated as I posted it back in 2005....

Starting in model year 2001 production Z06's were fitted with P/N 12564457 {Improved Torque Tube & Drive Shaft Assembly-Torque Tube Assembly } and these P/N's were slowly introduced into all model corvettes that year. My contact at GM could not give me specifics but as of today all Manual Trans replacement Torque Tube Assembly's have P/N 12564457.

Tq Tube P/N 12564457.
The driveshaft is upgraded from a metalmatrix composite to aluminum alloy 6061, and it is increased in diameter from 55mm to 63mm. Driveshaft couplings have also been upgraded from 10mm to 12mm on manual-equipped models for additional strength and durability

Nov 8, 2008 | 08:37 PM

#28

Rconce01

Pro

Joined: Apr 2004

Posts: 719

Likes: 21

From: Miami Fl

you can run two solid couplers and its very smart... i am doing it now and i spoke with another forum member that has been running like that for a while.

Quote:

Originally Posted by GrantB

1) The older 10mm bushings are no longer available from GM, correct? The guy at the parts counter only shows one part number for all C5s, regardless of year.

2) Can the newer 12mm bushings fit in the older-style torque tubes if you use different fasteners? My '99 bushings are 1.10" long, and I can get a bolt with a 12mm shoulder that will neck down to thread into my tube.

3) Are the 12mm bushings stronger than the older 10mm ones?

4) I'm assuming running two (or possibly even one) solid bushing is not the smartest thing to do? I was considering trying it with two solids and measuring runout to see how bad the binding might be.

Thanks for any help.