Flex Plate "Save" Report
07-03-2009 | 09:33 AM
#46
Team Owner
Joined: May 2004
Posts: 28,607
Likes: 2,648
From: Philly PA
and to clarify , once you have verified the torque/loctite on the rear bolt then it can be left alone and the tension released on the front bolt only.
If this isnt done atleast once and the rear bolt isnt tight you can continually be readjusting the front bolt to relieve tension.
The rear bolt can also mushroom the collar or otherwise damage the splines so the trans input may not be able to slide off of the driveshaft , if disassembly is required
If this isnt done atleast once and the rear bolt isnt tight you can continually be readjusting the front bolt to relieve tension.
The rear bolt can also mushroom the collar or otherwise damage the splines so the trans input may not be able to slide off of the driveshaft , if disassembly is required
07-03-2009 | 11:04 AM
#47
Former Vendor
Joined: Feb 2004
Posts: 2,139
Likes: 0
and to clarify , once you have verified the torque/loctite on the rear bolt then it can be left alone and the tension released on the front bolt only.
If this isnt done atleast once and the rear bolt isnt tight you can continually be readjusting the front bolt to relieve tension.
The rear bolt can also mushroom the collar or otherwise damage the splines so the trans input may not be able to slide off of the driveshaft , if disassembly is required
If this isnt done atleast once and the rear bolt isnt tight you can continually be readjusting the front bolt to relieve tension.
The rear bolt can also mushroom the collar or otherwise damage the splines so the trans input may not be able to slide off of the driveshaft , if disassembly is required
Yes, the rear pinch bolt needs to be checked for correct torque, that it is positioned correctly and has not been hammered into place misaligned with the rear drive shaft groove.
However after this is done, the need to keep relieving the front flex plate tension because of drive shaft slippage will still be of concern. Unless other means are used to correct the drive shaft slippage.
With respect,
07-12-2009 | 02:46 AM
#48
Rennlist Member
Joined: Dec 2002
Posts: 5,283
Likes: 49
From: Australia
Timp in oz posted a query re tranny oil cooler pressure, and another found a link along the way:-
http://www.gnttype.org/techarea/tran...n/trantsb.html
wherein some cases of conventional engine/gearbox setups that had TBF were examined, and a connection in some cases made to restrictions in the tranny oil cooler circuit producing higher than normal pressures leading to the TBF. Eg a measured end load on the crank of 300lbs, alongside a cooler inlet pressure of 100psi, and when the cooler back pressure was removed, the crank end load disappeared.
Considering that in a 928 the converter is mounted on its own bearings, I am not sure the above situation will occur in our cars, but its worth thinking on some.
jp 83 Euro S AT 52k
http://www.gnttype.org/techarea/tran...n/trantsb.html
wherein some cases of conventional engine/gearbox setups that had TBF were examined, and a connection in some cases made to restrictions in the tranny oil cooler circuit producing higher than normal pressures leading to the TBF. Eg a measured end load on the crank of 300lbs, alongside a cooler inlet pressure of 100psi, and when the cooler back pressure was removed, the crank end load disappeared.
Considering that in a 928 the converter is mounted on its own bearings, I am not sure the above situation will occur in our cars, but its worth thinking on some.
jp 83 Euro S AT 52k
07-12-2009 | 09:01 AM
#49
Former Vendor
Joined: Feb 2004
Posts: 2,139
Likes: 0
Hi JP,
This has been discussed on this forum before. The 928 setup as you point out helps to stop this from happening to a point in the early stages. The 928 owner that will have torque converter ballooning will notice aluminum shavings and other noises coming from the trans/torque converter housing as a precursor to forward pressure being exerted onto the front flexplate/flywheel/crank and thrust bearing.
This situation is an extremely rare occurrence in our automatic 928s from what we learned during our research. However it can't be discounted fully though.
HTH,
This has been discussed on this forum before. The 928 setup as you point out helps to stop this from happening to a point in the early stages. The 928 owner that will have torque converter ballooning will notice aluminum shavings and other noises coming from the trans/torque converter housing as a precursor to forward pressure being exerted onto the front flexplate/flywheel/crank and thrust bearing.
This situation is an extremely rare occurrence in our automatic 928s from what we learned during our research. However it can't be discounted fully though.
HTH,
