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
» Rebuilt engine threw three rods
Yesterday at 7:45 pm by jpkinerk

» 1984 Gen IV 5.3 Swap
Sun Dec 03, 2017 10:54 am by superman22x

» Aluminum 5.3 swap
Sat Dec 02, 2017 7:59 pm by turbobob924

» Power and Torque figures
Sat Dec 02, 2017 11:27 am by Fubar

» Aftermaket Seat Options
Sat Dec 02, 2017 8:04 am by Jchard944

» 83' Porsche 944 LM7 Build
Thu Nov 30, 2017 8:47 pm by Jchard944

» 948 Badges - Just in time for Christmas
Wed Nov 29, 2017 6:59 pm by Admin

» Atlanta area cars and shops
Wed Nov 29, 2017 9:49 am by Bmillar

» New convert under way
Mon Nov 27, 2017 12:34 pm by kevin924kevin

» Did anyone do a before and after weight?
Sun Nov 26, 2017 10:44 am by murrayg

December 2017
MonTueWedThuFriSatSun
    123
45678910
11121314151617
18192021222324
25262728293031

Calendar Calendar

Log in

I forgot my password


Torque Tube / drive shaft spline issues

View previous topic View next topic Go down

Torque Tube / drive shaft spline issues

Post  Tehone on Tue Jul 05, 2011 7:54 pm

I have a 84' 944 that had a auto trans that is giving way to a 86' turbo 5-spd. I have read the issues surrounding the end of the driveshaft and wonder about what I have come across in the differences between the auto drive shaft vs. the manual shaft.

The picture below is the auto on the left and the manual on the right. I was unaware of the difference and did not know of the retainer clip on the auto that is reatined on the front side of the splines for the rubber dampner flywheel. The dampner was destroyed and since I didn't know this clip was there I fought many days and hours trying to seperate the drive shaft TT from the back of the engine Evil or Very Mad . Finally fought my way through this by removing the bellhousing and then the light went off when I saw the retaining clip.
[You must be registered and logged in to see this link.][/img]

Looking at the front, the auto (right) has a bearing right out toward the end of the TT housing and the manual (left) the bearing is nowhere to be seen.
[img][You must be registered and logged in to see this link.][/img]

The tell of the tape: auto
[img][You must be registered and logged in to see this link.][/img]

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

Do I have a problem with my manual TT driveshaft with the bearing recessed as it is or are they all like this?

After reading and seeing pic's of the issue with the end of the driveshaft behind the pilot bearing area bent or distorted that it may possibly be caused with the bearing recessed so far back in the TT. I'm not sying that this was the reason but if the front of the shaft is supported by the crankshaft pilot bearing and then the bearing in the TT in the location that is as noted in my case. How much flex is there in the driveshaft between the pilot bearing and the first bearing in the TT? Since the LS motors are capable of putting out a whole lot more torque and horspower than the Porsche engine I would say there has to be some flex and would / could cause damged to the end of the driveshaft spline area. I'm sure it would take a lot of flex to pull the tip of the drive shaft out of the pilot bearing but you guys that are running the big horspower and torque launching it to the big fat meats at the rear wheels something has to be under a lot of stress to the power being applied.

How many bearings are in the TT and where are they typically located? If mine isn't an issue would it not be better to have a bearing located out toward the end of the TT like what I found in the auto application? It would support the driveshaft under load don't you think?

Tehone

Posts : 83
Join date : 2010-09-20

Back to top Go down

TT dimensions

Post  fliermike45 on Tue Jul 05, 2011 9:32 pm

If you are interested please pm me and I will give you the email address for Constantine who rebuilds these shafts and is an expert on them.

fliermike45

Posts : 778
Join date : 2009-09-19

Back to top Go down

Re: Torque Tube / drive shaft spline issues

Post  Admin on Tue Jul 05, 2011 9:56 pm

There is nothing wrong with your manual TT, unless it's just wore out! The tip of the manual TT rides in the Pilot bearing, that's where it gets it support , the auto TT doesn't have this option.

Admin
Admin
Admin

Posts : 1429
Join date : 2009-06-08
Age : 59
Location : Arlington,Texas

http://www.TexasPerformanceConcepts.com

Back to top Go down

Re: Torque Tube / drive shaft spline issues

Post  Tehone on Wed Jul 06, 2011 6:05 am

I wasn't thinking about the auto TT not being supported by a pilot bearing and would reflect back as to why the bearing would be positioned as it was found thus supporting the end of the shaft for the movement in the rubber flywheel dampner especially when they go bad.

If the bearing location for the auto supports in the way it does I think it would be an enhancement for the manual TT and the new power houses. Having a bearing located at the end of the TT would close the distance between the TT bearing and pilot bearing and help support and take load off of the pilot bearing.

Fliermike45, I will PM for the info and inquire more with rebuilder.

Tehone

Posts : 83
Join date : 2010-09-20

Back to top Go down

Re: Torque Tube / drive shaft spline issues

Post  Tehone on Thu Jul 07, 2011 6:49 pm

Admin wrote:.... The tip of the manual TT rides in the Pilot bearing, that's where it gets it support , the auto TT doesn't have this option.

Got to thinking about the auto not having a pilot bearing to ride in and looked at the porsche engine today and it looks like it has a pilot bearing to me.

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


Last edited by Tehone on Thu Jul 07, 2011 6:50 pm; edited 1 time in total (Reason for editing : no picture)

Tehone

Posts : 83
Join date : 2010-09-20

Back to top Go down

Re: Torque Tube / drive shaft spline issues

Post  Tehone on Sat Jul 09, 2011 9:00 am

Had a discussion with Constantine and it is believed what I have is a typical TT bearing placement in both the auto and manual TT's and reinforced what others had responded too as well. I had thought that my findings might have some bearing on the driveshaft spline issues but it doesn't.

It was mentioned that while the TT was out, now was the time to rebuild, as it's removal/installation is not all that user freindly.

Tehone

Posts : 83
Join date : 2010-09-20

Back to top Go down

Re: Torque Tube / drive shaft spline issues

Post  xschop on Sat Jul 09, 2011 4:55 pm

Rebuild it while it's out.
avatar
xschop

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

Back to top Go down

Torque Tube

Post  fliermike45 on Sat Jul 09, 2011 6:47 pm

Constantine did mine, he's a class act.

fliermike45

Posts : 778
Join date : 2009-09-19

Back to top Go down

Re: Torque Tube / drive shaft spline issues

Post  Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

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