HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

Comments: 0

Latest topics
» 1987 944 Turbo --> LS
Today at 8:38 pm by iamgod

» Oil Cooler Adapter Not Working?
Wed Oct 11, 2017 9:32 pm by sharkey

» 1987 944S 3800 L67 Turbo...in progress
Wed Oct 11, 2017 1:08 pm by Sirayden

» C6 Z06 Brakes on my 944
Wed Oct 11, 2017 8:25 am by Schuepbach

» sbc swap in a 1981 924
Mon Oct 09, 2017 9:28 pm by sharkey

» JP's LS1 Conversion
Mon Oct 09, 2017 8:42 pm by 924sbc406

» Cayenne Front and Rear Brakes on 944
Sun Oct 08, 2017 4:15 pm by superman22x

» Scca Xp solo build
Wed Oct 04, 2017 7:55 pm by yamamtx

» Steering rack clearance
Wed Oct 04, 2017 6:14 am by remaxagent33

» Does anyone have a QuickTime bellhousing for sale?
Tue Oct 03, 2017 11:54 pm by zeusrotty

October 2017
MonTueWedThuFriSatSun
      1
2345678
9101112131415
16171819202122
23242526272829
3031     

Calendar Calendar

Log in

I forgot my password


Wore out my drive shaft

Page 1 of 4 1, 2, 3, 4  Next

View previous topic View next topic Go down

Wore out my drive shaft

Post  DVC on Wed Mar 16, 2011 11:19 am

So I was having clutch release issues and after trying all else, I tore it apart. This is what my drive shaft looks like after 4 years of daily driven LS2 power (clutch end):

[You must be registered and logged in to see this image.]

Pilot bearing is cherry as are the TT bearings and motor mounts.

avatar
DVC

Posts : 56
Join date : 2009-07-02
Location : AL

Back to top Go down

Re: Wore out my drive shaft

Post  Arthropraxis on Wed Mar 16, 2011 11:58 am

What kind of clutch disc are you using?
avatar
Arthropraxis

Posts : 1073
Join date : 2009-09-02

Back to top Go down

Re: Wore out my drive shaft

Post  xschop on Wed Mar 16, 2011 12:32 pm

You got Spec'd
avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

Re: Wore out my drive shaft

Post  Arthropraxis on Wed Mar 16, 2011 1:00 pm

Don't say that. I have one of those. As a matter of fact I have bought two.
avatar
Arthropraxis

Posts : 1073
Join date : 2009-09-02

Back to top Go down

Re: Wore out my drive shaft

Post  xschop on Wed Mar 16, 2011 1:20 pm

Better copy your TT shaft in 300M.

avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

Re: Wore out my drive shaft

Post  acorad on Wed Mar 16, 2011 1:33 pm

I have the Spec Kevlar disk and Spec (I believe) heavy duty pressure plate (which I really don't like) all from RH as part of their upgraded clutch kit.

What exactly does this mean?
xschop wrote:Better copy your TT shaft in 300M.
avatar
acorad

Posts : 645
Join date : 2010-12-21
Location : Agoura Hills, CA

Back to top Go down

Re: Wore out my drive shaft

Post  laptop_geek on Wed Mar 16, 2011 1:44 pm

Ouch, any idea of what would prevent this (other than keeping the engine stock). Should the TT have been rebuilt, the Pilot bearing replaced, motor mounts changed, ect? Or is this just one thing that comes with the fun?
avatar
laptop_geek

Posts : 230
Join date : 2010-05-14
Age : 27
Location : Memphis, TN

Back to top Go down

Re: Wore out my drive shaft

Post  944-LT1 on Wed Mar 16, 2011 1:52 pm

Looks to me like the disk was not a good match to the splines. You can see the unharmed splines have a plateau at each peak whereas the worn away splines have a pointed peak. The disk splines could be off just a bit and after repeated cycles, just wear away the splines.

XSCHOP......300 moles? Laughing

_________________
[You must be registered and logged in to see this image.]

[You must be registered and logged in to see this link.]
avatar
944-LT1
Moderator
Moderator

Posts : 1251
Join date : 2009-06-09
Age : 95
Location : NOTRE DAME

Back to top Go down

Re: Wore out my drive shaft

Post  xschop on Wed Mar 16, 2011 2:18 pm

I saw pics from the old RH dictator board just like DVC's and quench hardened my TT shaft right on the car. The Rockwell hardness of the TT shaft is nowhere near what drive axles are today.
avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

Re: Wore out my drive shaft

Post  acorad on Wed Mar 16, 2011 2:40 pm

xschop wrote:I saw pics from the old RH dictator board just like DVC's and quench hardened my TT shaft right on the car.
Sounds pretty slick!

So, howja do it?
avatar
acorad

Posts : 645
Join date : 2010-12-21
Location : Agoura Hills, CA

Back to top Go down

Re: Wore out my drive shaft

Post  laptop_geek on Wed Mar 16, 2011 2:42 pm

xschop wrote:I saw pics from the old RH dictator board just like DVC's and quench hardened my TT shaft right on the car. The Rockwell hardness of the TT shaft is nowhere near what drive axles are today.

Hmm, good idea. Did you use an acetylene torch? Any idea what the surface temp was? Do you think there will be a problem with stress cracks from the more brittle material?

Does anyone know the material the TT is made of?
avatar
laptop_geek

Posts : 230
Join date : 2010-05-14
Age : 27
Location : Memphis, TN

Back to top Go down

Re: Wore out my drive shaft

Post  xschop on Wed Mar 16, 2011 2:59 pm

It wasn't too hard, just had a fire extinguisher on hand (wife with a garden hose). I simply used a portable MAPP gas and heated the the entire spline area cherry red and then poured OLD-used motor oil on it with a 50/50 mix of diesel. I took a file to it and the splines were not very easy to file on the ends as before (you can test harness this way)

This is not the problem though. The instant torque of the V8 is what is killing the TT shaft tip and the poor design of the swap disc.

Edit: I'm putting a pictorial together to drop some knowledge and why I chose the Specific Dodge Truck Disc. From my drawings looks like DVC's TT spline engagement's about 18-19mm, can't imagine it held this long.
avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

pics say it all

Post  xschop on Wed Mar 16, 2011 3:31 pm

[You must be registered and logged in to see this image.]


Last edited by xschop on Wed Mar 16, 2011 7:58 pm; edited 1 time in total
avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

Re: Wore out my drive shaft

Post  Porch on Wed Mar 16, 2011 4:04 pm

Constantine (same guy who makes the TT bearings) is selling new improved driveshafts for the 944's, i believe.
avatar
Porch

Posts : 851
Join date : 2009-09-02
Age : 36

Back to top Go down

Re: Wore out my drive shaft

Post  944-LT1 on Wed Mar 16, 2011 4:15 pm

Porch wrote:Constantine (same guy who makes the TT bearings) is selling new improved driveshafts for the 944's, i believe.
In that case, think he can make one with the stock corvette spline!!

_________________
[You must be registered and logged in to see this image.]

[You must be registered and logged in to see this link.]
avatar
944-LT1
Moderator
Moderator

Posts : 1251
Join date : 2009-06-09
Age : 95
Location : NOTRE DAME

Back to top Go down

Re: Wore out my drive shaft

Post  xschop on Wed Mar 16, 2011 4:21 pm

I have a piece of 300M rod sitting around at the shop from months ago. But I believe the clutch disc spline engagement lenth (Lack thereof) IS the problem obviously. I talked with Constantine before about this problem. He would sell out if he made them 2-piece like the 928 manual TT's...especially on a C5 2-piece BH 948.
avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

Re: Wore out my drive shaft

Post  DVC on Wed Mar 16, 2011 4:39 pm

Arthropraxis wrote:What kind of clutch disc are you using?

[You must be registered and logged in to see this image.]



[You must be registered and logged in to see this image.]
avatar
DVC

Posts : 56
Join date : 2009-07-02
Location : AL

Back to top Go down

Re: Wore out my drive shaft

Post  xschop on Wed Mar 16, 2011 4:42 pm

What's the exact fore to aft spline engagement length?
avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

Re: Wore out my drive shaft

Post  DVC on Wed Mar 16, 2011 4:43 pm

I have a rebuilt TT coming from Constantine with his Super Bearings. Great guy to deal with! Also a Stage 2 Spec clutch along with their aluminum FW and aluminum PP.
avatar
DVC

Posts : 56
Join date : 2009-07-02
Location : AL

Back to top Go down

Re: Wore out my drive shaft

Post  xschop on Wed Mar 16, 2011 4:54 pm

""""Also a Stage 2 Spec clutch along with their aluminum FW and aluminum PP.""""

You'll just fry the new TT 2x as quick if the disc splines are the same length.....
avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

Re: Wore out my drive shaft

Post  v8carreragts on Wed Mar 16, 2011 5:09 pm

You'll just fry the new TT 2x as quick if the disc splines are the same length.....

I'm not certain that is true. MichaelB has his LS supercharged and routinely drag races it.He hasn't said anything about his TT. I seem to remember ~600 HP at the rear wheels? Also turbo bob with his GN powered 924. I seem to remember he had about the same and all he did was trash transaxles.

Why is your disc only burnt on one side??
avatar
v8carreragts

Posts : 327
Join date : 2009-06-08
Age : 60
Location : Tucson, AZ

Back to top Go down

Re: Wore out my drive shaft

Post  xschop on Wed Mar 16, 2011 5:17 pm

You cannot double the power and torque of the 944 drivetrain and decrease the clutch spline engagement and expect the TT shaft tip to last long. Just by looking at the pics of the RH clutches and Spec clutches made me run. I'm glad RH banned me back in the day and didn't get suckered into their SMS engineering lol....clueless
avatar
xschop

Posts : 2710
Join date : 2009-06-09
Location : OKC

Back to top Go down

Re: Wore out my drive shaft

Post  DVC on Wed Mar 16, 2011 5:57 pm

Well, found some more time to look at it. This pic illustrates where the clutch sat when it was engaged.

[You must be registered and logged in to see this image.]

If you have a swap built by Mike Gokey, I recommend checking yours.


avatar
DVC

Posts : 56
Join date : 2009-07-02
Location : AL

Back to top Go down

Re: Wore out my drive shaft

Post  fliermike45 on Wed Mar 16, 2011 6:07 pm

Constantine just stopped by my house to pick up my old TT (He's going to recycle the outer tube as the shaft is shot).
We discussed the picture of the DVC's worn shaft. I had previously cut the end of my old shaft to use as a clutch alignment tool, so we inserted it in my new clutch plate (its from Las Vegas) and put a marker tape around the splines to indicate depth of spline engagement. We then compared it with DVC's photo.

My opinion (mine alone) is that the shaft was not fully engaged in the clutch plate and also not fully engaged in the pilot bearing. But, it seems strange that the spline wear is even, almost like the splines had been machined to fit a smaller diameter clutch plate.

[You must be registered and logged in to see this link.]


fliermike45

Posts : 778
Join date : 2009-09-19

Back to top Go down

Re: Wore out my drive shaft

Post  v8carreragts on Wed Mar 16, 2011 6:23 pm

I wasn't thinking about the spline engagement, just the TT.

What I did with mine was I tapped the shaft forward until it engaged the clutch hub completely. (approx. 1/4") There was about 1 5/16" engagement in the transaxle coupler originally so now there is about the same in the disc and the coupling. And I made a new dimple in the shaft (at the rear) so the clamping screw can be put back on.


I know that there are a few that had this problem and destroyed the shaft as well. (from the old board) I have a 1/2" thick adapter plate on a stock Chevy bellhousing (6 3/8" depth Gen I) so the shaft isn't quite long enough. The Quicktime bellhousing is 6 3/8" without an adapter (modified for the 944) so it shouldn't be a problem using one of those.

Maybe your adapter is too thick or your shaft is not in the correct location in the tube. They can move over time. The shaft should be (OEM) 49mm +-0.5mm from the transaxle mounting surface bellhousing to the end of the shaft. The manual says to use a plastic mallet to adjust it.
avatar
v8carreragts

Posts : 327
Join date : 2009-06-08
Age : 60
Location : Tucson, AZ

Back to top Go down

Page 1 of 4 1, 2, 3, 4  Next

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum