TR Register Forum

3° Tr4 trunions
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Author:  aladdin [ Fri Jul 28, 2017 11:16 am ]
Post subject:  Re: 3° Tr4 trunions

I have found that you will get scuffing with the Escort R & P, especially with wider wheels that gives you a wider track and this alters the ackerman along with the steering conversion. The amount of change will depend on the wheel offset.
Changing the steering arms helps but not much, you may not even notice. You will need to remove the dust plates if they are still in place. This change is aimed at reducing bump steer which comes with the R & P.

Author:  Ian0712 [ Fri Jul 28, 2017 9:17 pm ]
Post subject:  Re: 3° Tr4 trunions

The Dust plates are still there so I would say they haven't been swapped over yet. It scuffed before I changed the wheels and tyres. When I do the trunion change to 3° and the bigger stub axles I will swap the steering arms over and see what happens..

Author:  aladdin [ Fri Jul 28, 2017 10:24 pm ]
Post subject:  Re: 3° Tr4 trunions

An issue you may get depending on the wheel off set and camber is the lack of clearance between the rim and upper control arms when fitting the latter ball joint. I found this to be an issue with two different sets of alloy wheels, 5.5" and 6" and 5.5" wires.
When turning a tight turn, the control arm would take off the wheel weights. Even though I ground the ends of the arms back, they would still hit the weights. I now run with spacers an the front wheels.
This may just be my wheels (one set 5.5" from Moss and the other 6" from SA) as I have not heard any other member have the same problem.

Author:  Ian0712 [ Sat Jul 29, 2017 7:56 am ]
Post subject:  Re: 3° Tr4 trunions

My wires are the register 5.5 so have to hope they don't foul . Guess I won't know till I get it all fitted. It might not happen as niether NOS or TRF has replied to my emails. I find this very annoying as I can't move forward.

Author:  Ian0712 [ Sat Jul 29, 2017 5:08 pm ]
Post subject:  Re: 3° Tr4 trunions

Just heard back from Ross at standard vanguard in Victoria he has all my bits except one of the trunions. But he is still looking. He doesn't have the uprated axles but I hope to get them from TRF. Still nothing from NOS or TRF though.

Author:  Ian0712 [ Tue Aug 29, 2017 11:10 am ]
Post subject:  Re: 3° Tr4 trunions

The second hand parts arrived from vanguard triumph in Victoria. The four upper control arms and a TR4 and a TR3 vertical link. I will clean them up and check their condition today. The other parts will come from TRF next month. Uprated axles, TR4 upper ball joints and 3° trunions.

Author:  Ian0712 [ Wed Aug 30, 2017 3:41 pm ]
Post subject:  Re: 3° Tr4 trunions

The second hand upper control arms are ok and now cleaned and painted ready go fit when the other parts arrive. Both second hand vertical links are bent one by 9.5 mm the other by 11.5mm so I have returned them to Vanguard spares for refund. I will just use the links that are in the car already.

Author:  Ian0712 [ Tue Jul 03, 2018 9:35 am ]
Post subject:  Re: 3° Tr4 trunions

The 3 deg reunions, ball joints. Uncle Jack's upgraded stub axles all arrived from TRF recently. I have now got them all fitted. Firstly the new stub axles have improved the car out of sight. No more brake peddle travel in carparks and wandering on the road as the old stub axles bend. Fitting the 3 deg trunions has now put more feel into the steering, so much better to drive. I have urethane upper bushes fitted and nylon lower bushes, that have now been shimmied to achieve correct tension to hold everything in place. The castor angle is still slightly more on the right side so it will drop to the left a bit, but the overall benefit is so much better. It feels much more like a modern car to steer now. I can fully recomend fitting these parts to improve your car.
I still have to swap the steering arms over to get a better Ackerman angle but I will need a new longer rack and pinion to do that. So currently looking at that.

Author:  rob noonan [ Thu Jul 05, 2018 8:52 pm ]
Post subject:  Re: 3° Tr4 trunions

Hello Ian,
Coming in a bit late on all this good advice. Did this on my car, great improvement, better directional stability and less under steer! Steering arms need to be as close as possible to disc, To get ackerman angle right (toe out on turns) as you may know, the car really needs to be on a wheel alignment machine using degreed turn tables to measure the toe out on turns for each side. Let the wheel aligner mechanic know small adjustments can be made by adding a shim washers to steering arm bolts.
Regards, rob.

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