Trailing arm bushing removal Options

[mwizard1]

Making good progress on my upgrade to 5 bolt 911 parts, but... I also want to change the OEM rubber bushings on the rear trailing arms to delron. Any tips for getting the old rubber bushings out?

[brant]

Original bushings are vulcanized in

Aftermarket creates a surface that needs to rotate where as original just flexes

So any aftermarket bushing has to rotate in the housing at the ID of the torsion tube and since it wasn’t created to be a bearing surface you will have to fight and make sure the torsion tube can rotate in there


Lots of them get sticky and stop rotating
So you get stiction or a bit corner that doesn’t rotate back to baseline
Often causing one corner not to return down and weight jack the car

For that reason fit is critical

One of my cars has poly or aftermarket from a long time ago

We created grease channels inside the bushing and drilled the arm and bushing to allow the grease path with zerk installed

Cut the ID spiral grease path with a dremel


My other car has roller bearings that are not prone to stickiion because of the installed bearing race

You can never go back to stock without replacing the suspension

Removal of stock involves a press and fire

Most folks melt the stock bushing loose with a torch
But there is a ton of cleanup required to get the melted rubber out and create a clean surface

[mwizard1]

Original bushings are vulcanized in

Aftermarket creates a surface that needs to rotate where as original just flexes

So any aftermarket bushing has to rotate in the housing at the ID of the torsion tube and since it wasn’t created to be a bearing surface you will have to fight and make sure the torsion tube can rotate in there


Lots of them get sticky and stop rotating
So you get stiction or a bit corner that doesn’t rotate back to baseline
Often causing one corner not to return down and weight jack the car

For that reason fit is critical

One of my cars has poly or aftermarket from a long time ago

We created grease channels inside the bushing and drilled the arm and bushing to allow the grease path

Cut the ID spiral grease path with a dremel


My other car has roller bearings that are not prone to stickiion because of the installed bearing race

You can never go back to stock without replacing the suspension

Removal of stock involves a press and fire

Most folks melt the stock bushing loose with a torch
But there is a ton of cleanup required to get the melted rubber out and create a clean surface

Thank you for the info. Where did you find roller bearings?