TVR Techncians (Tuscan)...............Help
Discussion
Ok......... I'm no TVR Technician, but I'm a damned good amateur mechanic and started what should be a simple job which has turned into a nightmare due to the design and placement of the Propshaft Bolts on a Tuscan.
I've had a rear end vibration that come in at 100mph + which I've been trying to diagnose for quite some time (Wheels Checked, Replaced Both Tyres, Alignment Check, Wheels Balanced twice etc etc). A few days ago I decided to have a concerted effort to find the problem. On close inspection I saw that one of the propshaft bolts (Propshaft to Diff) was loose, and on removing it I noticed that the shank on the bolt was not long enough to acurately locate both the propshaft flange and diff flange, the shank part of the bolt was only as long as the thickness of the propshaft flange, not long enough to go into the diff flange. Cross referencing pictures of my bolts and those offered by Clever Trevor, the difference can be clearly seen. The shank on my bolts is about half the length of those sold by Clever Trever. The car has always been serviced since new by the TVR Center, and there is no record of the need for the propshaft ever to have been removed since the car was new, so I can only guess that these have been in since it left the factory ......... Hmmmmm. So I decided to order a replacement set of bolts and replace all four. The loose bolt came out easily........................
My Old Bolt.........Notice the length of the shank.
New Bolts...........With what appears to be the correct lenght shank, which will go through both propshaft and diff flange to locate the two securely.
The other three bolts however............Don't want to come out ! ! !
Problem is that one of the chassis cross members is right in the way, just where you need to get a spanner to remove the propshaft bolts which connect the propshaft to the diff flange. "REALLY" Bad placement of either the cross member or the diff flange position, and the nuts don't allow a ring spanner to go over them, as they are almost touching the diff nose. Don't want to muller the nuts using an open end spanner on the nuts, and the bolt heads are exactly the same (Not sufficient space to get a ring spanner over them as they're tight up against the UJ Joint.
How the hell do you get around this................... ????
I've had a rear end vibration that come in at 100mph + which I've been trying to diagnose for quite some time (Wheels Checked, Replaced Both Tyres, Alignment Check, Wheels Balanced twice etc etc). A few days ago I decided to have a concerted effort to find the problem. On close inspection I saw that one of the propshaft bolts (Propshaft to Diff) was loose, and on removing it I noticed that the shank on the bolt was not long enough to acurately locate both the propshaft flange and diff flange, the shank part of the bolt was only as long as the thickness of the propshaft flange, not long enough to go into the diff flange. Cross referencing pictures of my bolts and those offered by Clever Trevor, the difference can be clearly seen. The shank on my bolts is about half the length of those sold by Clever Trever. The car has always been serviced since new by the TVR Center, and there is no record of the need for the propshaft ever to have been removed since the car was new, so I can only guess that these have been in since it left the factory ......... Hmmmmm. So I decided to order a replacement set of bolts and replace all four. The loose bolt came out easily........................
My Old Bolt.........Notice the length of the shank.
New Bolts...........With what appears to be the correct lenght shank, which will go through both propshaft and diff flange to locate the two securely.
The other three bolts however............Don't want to come out ! ! !
Problem is that one of the chassis cross members is right in the way, just where you need to get a spanner to remove the propshaft bolts which connect the propshaft to the diff flange. "REALLY" Bad placement of either the cross member or the diff flange position, and the nuts don't allow a ring spanner to go over them, as they are almost touching the diff nose. Don't want to muller the nuts using an open end spanner on the nuts, and the bolt heads are exactly the same (Not sufficient space to get a ring spanner over them as they're tight up against the UJ Joint.
How the hell do you get around this................... ????
Edited by Jim Green on Wednesday 4th February 21:18
All out............. God what a job.
See link for an explanation of what's needed and how to do it. (Patience and determination required ! ! ! ).
Yes, the car was on axle stands all round.
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
See link for an explanation of what's needed and how to do it. (Patience and determination required ! ! ! ).
Yes, the car was on axle stands all round.
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Edited by Jim Green on Wednesday 4th February 19:12
Sorted.......... It seems like the reason for the rear end vibration was the prop shaft bolts not fitting correctly. I can only guess that over the 19,000 miles from new, the diff flange had started to wear on the threads on the bolts and the propshaft flange had started to move against the diff flange. Plus the fact that one of the bolts wasn't tight.
Had the MOT at Fernhursts yesterday, and she passed with flying colours, and the opportunity to stretch her legs on the way back (Private Road of course.........) I took her up to 130mph with no vibrations at all.
Sorted at last After replacing : both drive shaft assemblies including cv joints, 1 new rear wheel, two new rear tyres, prop shaft bolts.............. At least I have a new rear end now.
Had the MOT at Fernhursts yesterday, and she passed with flying colours, and the opportunity to stretch her legs on the way back (Private Road of course.........) I took her up to 130mph with no vibrations at all.
Sorted at last After replacing : both drive shaft assemblies including cv joints, 1 new rear wheel, two new rear tyres, prop shaft bolts.............. At least I have a new rear end now.
Gassing Station | General TVR Stuff & Gossip | Top of Page | What's New | My Stuff