Tasmin early rear suspension
Discussion
Has anyone used the one piece steel radius arm hub carrier. I am replacing the earlier cast aluminium type with these. The question is on the replacement arms one of the holes the pivot bar passes through is too large for the pin, should this have some type of bush fitted to make it the same diameter as the opposite hole so the pin fits properly, either metalastic or solid.
I don't have an early car, but a '96 400/SEAC type chassis with a SEAC interior 280DH. I have been paying attention to the suspension drawings in the spare parts manuals available. Whilst collecting/making all the rubber versions of all the bushes (the drawings are on my FB page). I had two back in 83-87 and had the salavge of one from back in the day.
One of the thing that has amazed me is the lack of clarity on the rear trailing arm cars (not that I need that for mine) differential area between the early version and later A frame version (the middle version you are dealing with) with the cross over/knowledge (there is not a drawing of the A frame differential bushing area).
With the spares I have around the from the salvage, (and knowledge, having ran a TVR workshop).
With the salvage of the early version, and can see that the factory are using lots of UNC parts that appear in cross referencing TVR part numbers to other parts used in the same drawing, later then, have been changed to metric. I also see parts use as front suspension, washers, THEN used in the rear trailing pivot link, which I also know that these are used on the Vixen, so imperial. (the Tasmin part is listed as 'special') ...the Ford part is a Imperial (I have made S/S ones this week) only sold with the bolt it is used with. The same washer is used with the early differential bush (that then shows as being a matched as UNC nut by TVR part numbers and my salvage).
All this said, pictures would be good, and if you are deep into this (as you are doing the 100% right conversion IMHO) is it some thing you have paid attention to, as I would pick your brains over the drawings (only if you are interested). A@
One of the thing that has amazed me is the lack of clarity on the rear trailing arm cars (not that I need that for mine) differential area between the early version and later A frame version (the middle version you are dealing with) with the cross over/knowledge (there is not a drawing of the A frame differential bushing area).
With the spares I have around the from the salvage, (and knowledge, having ran a TVR workshop).
With the salvage of the early version, and can see that the factory are using lots of UNC parts that appear in cross referencing TVR part numbers to other parts used in the same drawing, later then, have been changed to metric. I also see parts use as front suspension, washers, THEN used in the rear trailing pivot link, which I also know that these are used on the Vixen, so imperial. (the Tasmin part is listed as 'special') ...the Ford part is a Imperial (I have made S/S ones this week) only sold with the bolt it is used with. The same washer is used with the early differential bush (that then shows as being a matched as UNC nut by TVR part numbers and my salvage).
All this said, pictures would be good, and if you are deep into this (as you are doing the 100% right conversion IMHO) is it some thing you have paid attention to, as I would pick your brains over the drawings (only if you are interested). A@
Mine has the single piece training arms. The bolt you re referring to is a bit of a mongrel of a thing, it s 1/2 diameter, yet has a M12 external thread on its end.
Regarding the fitting of said bolt into the trailing arm, the bolt is fitted in the front (viewed on the car) with the M12 thread/nut at the rear. There is a steel bush in the trailing arm at the FRONT, from memory appx 20mm OD and about 30mm in length, this bush is to allow the bolt to tighten on the metalastic bush of the trailing arm, as without this steel bush the securing bolt would not be able to apply sufficient clamping force on the metalastic bush.
The steel bush doesn t move in use, is just to allow clamping and is (should be) a clearance fit in the trailing arm, many you see are rusted in place, resulting in noise from the rear suspension as the metalastic bush isn t actually tight to the bolt.
Said bush is in the arrowed part of the trailing arm.
Edited as the ‘bush’ is in the front of the training arms NOT the rear!
More pictures to follow…
Regarding the fitting of said bolt into the trailing arm, the bolt is fitted in the front (viewed on the car) with the M12 thread/nut at the rear. There is a steel bush in the trailing arm at the FRONT, from memory appx 20mm OD and about 30mm in length, this bush is to allow the bolt to tighten on the metalastic bush of the trailing arm, as without this steel bush the securing bolt would not be able to apply sufficient clamping force on the metalastic bush.
The steel bush doesn t move in use, is just to allow clamping and is (should be) a clearance fit in the trailing arm, many you see are rusted in place, resulting in noise from the rear suspension as the metalastic bush isn t actually tight to the bolt.
Said bush is in the arrowed part of the trailing arm.
Edited as the ‘bush’ is in the front of the training arms NOT the rear!
More pictures to follow…
Edited by taz turbo on Wednesday 24th December 09:13
taz turbo said:
Mine has the single piece training arms. The bolt you re referring to is a bit of a mongrel of a thing, it s 1/2 diameter, yet has a M12 external thread on its end.
Regarding the fitting of said bolt into the trailing arm, the bolt is fitted in the front (viewed on the car) with the M12 thread/nut at the rear. There is a steel bush in the trailing arm at the FRONT, from memory appx 20mm OD and about 30mm in length, this bush is to allow the bolt to tighten on the metalastic bush of the trailing arm, as without this steel bush the securing bolt would not be able to apply sufficient clamping force on the metalastic bush.
The steel bush doesn t move in use, is just to allow clamping and is (should be) a clearance fit in the trailing arm, many you see are rusted in place, resulting in noise from the rear suspension as the metalastic bush isn t actually tight to the bolt.
Said bush is in the arrowed part of the trailing arm.
Edited as the bush is in the front of the training arms NOT the rear!
More pictures to follow
All part of my point...there is no pictorials of the middle version, that I can see. (your next post pictures have explained the bush perfectly). Regarding the fitting of said bolt into the trailing arm, the bolt is fitted in the front (viewed on the car) with the M12 thread/nut at the rear. There is a steel bush in the trailing arm at the FRONT, from memory appx 20mm OD and about 30mm in length, this bush is to allow the bolt to tighten on the metalastic bush of the trailing arm, as without this steel bush the securing bolt would not be able to apply sufficient clamping force on the metalastic bush.
The steel bush doesn t move in use, is just to allow clamping and is (should be) a clearance fit in the trailing arm, many you see are rusted in place, resulting in noise from the rear suspension as the metalastic bush isn t actually tight to the bolt.
Said bush is in the arrowed part of the trailing arm.
Edited as the bush is in the front of the training arms NOT the rear!
More pictures to follow
Edited by taz turbo on Wednesday 24th December 09:13
However regarding the 1/2 inch pivots (as in the early pictorial the nuts for the pivot match to other UNC bolts) AND, I know TVR's are odd, but they are not know for mixing 1/2" bar and metric threads. A@
Chris, I have drawings of (and created) all the rubber bushes I need to my late car, but the TVR025D010A on that link arm, do you have the old ones or a supplier of a 100% correct bush. (I 'might' have a used arm with the bushes in but, but I really don't need them and if there is a easier route).
A@
A@
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