The Ford Barn

40fordpu · 12-15-2012, 09:26 PM

Hey guys. Want to replace my front axle spring studs for the sway bar mount. Could some please explain to me the "movement" of the stud in the perch bolt? Does the stud actually move/rotate or is does it stay "fixed" in the hole? Thanks

Kube · 12-15-2012, 09:55 PM

The stud is a press fit and as such does not move within the perch. When the swivel moves, it torques the pin which causes a resistance. That resistance is what makes your front chassis want to return to its normal ride height.
Guys that install new pins that are size for size, undersize, or even only .001" or .002" oversize with the perch are not restoring the proper action designed in to the front chassis.
There was a good reason the Ford pins were made .004" - .005" oversize.

40fordpu · 12-15-2012, 09:58 PM

Good to know thanks. I have heard people say that macs has an installation tool. However, I only see a front spring shackle and leaf spring bushing removal tool. Looks like both sides are flat. I would assume Hitting the tool against the stud would "mushroom" the end of the stud??? Anyone use macs tool? Is there another tool I am missing? Any explanation?

Kube · 12-16-2012, 08:59 AM

Quote:

Originally Posted by 40fordpu

Good to know thanks. I have heard people say that macs has an installation tool. However, I only see a front spring shackle and leaf spring bushing removal tool. Looks like both sides are flat. I would assume Hitting the tool against the stud would "mushroom" the end of the stud??? Anyone use macs tool? Is there another tool I am missing? Any explanation?

I've never seen a reproduction tool offered to install the pins. They need to be pressed in. The KRW tool applies pressure simultaneously to the body of the pin and the threads. Any "hitting" as you suggest would indeed mushroom the outer sheath.

40fordpu · 12-16-2012, 06:53 PM

Do you have a picture of the KRW tool you use? Part number?

Kube · 12-17-2012, 09:43 AM

Sponsored Links (Register now to hide all advertisements)

Quote:

Originally Posted by 40fordpu

Do you have a picture of the KRW tool you use? Part number?

I have recorded the sale of five of these on eBay within the past 24 months. They ranged in price from $331 - $424. None included the two bushings.

The tool number is BV-121.

Gary in La. · 12-17-2012, 10:37 AM

Kube, are you saying that you use the spring shackle bolt tool to also install the sway bar stud?
I believe the tool for the stud is TZ-188, the truck shackle bolt tool which is considerably bigger.

Karl Wolf · 12-17-2012, 10:50 AM

I have found that for me, .001-.002 oversize is about as much as I can make work in the fixed eye end... The spring end is a bit more forgiving... So, I size the new bushing in my drill press with emery cloth for that fit. I find a washer or two that will go over the stud, held in place by the nut, to contact the outer sleeve of the bushing, then I can use a ruined 9/16" impact socket as a driver to install...
Karl

Kube · 12-17-2012, 11:03 AM

Quote:

Originally Posted by Gary in La.

Kube, are you saying that you use the spring shackle bolt tool to also install the sway bar stud?
I believe the tool for the stud is TZ-188, the truck shackle bolt tool which is considerably bigger.

I do use this tool.
There are different bushings for the different size shackle pins. The 40 pickup, when equipped with the optional sway bar utilized the same pins as the passenger car.

Gary in La. · 12-17-2012, 11:25 AM

This thread was addressing the sway bar stud when first started and this is what I was refering to.
Here are some pictures of the TZ-188 and also the complete KRW kit for spring shackles on the cars and trucks.

40fordpu · 12-17-2012, 03:04 PM

Beautiful kits guys. Unfortunately I would like to stay away from spending 300 to 400 plus dollars on a kit that I will use for 2 studs - and only one project. I wish I could but Karl seems to have a "good" solution for me now. I have not taken apart the front axle perch bolt so that will be the next "how to" on my list. As always appreciate the advice.

12-15-2012, 09:26 PM	#1
40fordpu Senior Member Join Date: Jun 2010 Location: Murrieta, CA Posts: 637	Front Axle Spring Stud - Sway Bar Hey guys. Want to replace my front axle spring studs for the sway bar mount. Could some please explain to me the "movement" of the stud in the perch bolt? Does the stud actually move/rotate or is does it stay "fixed" in the hole? Thanks

12-15-2012, 09:55 PM	#2
Kube Senior Member Join Date: May 2010 Location: Wisconsin, USA Posts: 9,015	Re: Front Axle Spring Stud - Sway Bar The stud is a press fit and as such does not move within the perch. When the swivel moves, it torques the pin which causes a resistance. That resistance is what makes your front chassis want to return to its normal ride height. Guys that install new pins that are size for size, undersize, or even only .001" or .002" oversize with the perch are not restoring the proper action designed in to the front chassis. There was a good reason the Ford pins were made .004" - .005" oversize. __________________ "I can explain it for you. However, I can't understand it for you".

12-15-2012, 09:58 PM	#3
40fordpu Senior Member Join Date: Jun 2010 Location: Murrieta, CA Posts: 637	Re: Front Axle Spring Stud - Sway Bar Good to know thanks. I have heard people say that macs has an installation tool. However, I only see a front spring shackle and leaf spring bushing removal tool. Looks like both sides are flat. I would assume Hitting the tool against the stud would "mushroom" the end of the stud??? Anyone use macs tool? Is there another tool I am missing? Any explanation?

12-16-2012, 06:53 PM	#5
40fordpu Senior Member Join Date: Jun 2010 Location: Murrieta, CA Posts: 637	Re: Front Axle Spring Stud - Sway Bar Do you have a picture of the KRW tool you use? Part number?

12-17-2012, 10:37 AM	#7
Gary in La. Senior Member Join Date: May 2010 Location: Louisiana Posts: 866	Re: Front Axle Spring Stud - Sway Bar Kube, are you saying that you use the spring shackle bolt tool to also install the sway bar stud? I believe the tool for the stud is TZ-188, the truck shackle bolt tool which is considerably bigger. Last edited by Gary in La.; 12-17-2012 at 10:43 AM. Reason: added info

12-17-2012, 10:50 AM	#8
Karl Wolf Senior Member Join Date: May 2010 Location: Mill Valley,Ca. Posts: 1,509	Re: Front Axle Spring Stud - Sway Bar I have found that for me, .001-.002 oversize is about as much as I can make work in the fixed eye end... The spring end is a bit more forgiving... So, I size the new bushing in my drill press with emery cloth for that fit. I find a washer or two that will go over the stud, held in place by the nut, to contact the outer sleeve of the bushing, then I can use a ruined 9/16" impact socket as a driver to install... Karl

12-17-2012, 03:04 PM	#11
40fordpu Senior Member Join Date: Jun 2010 Location: Murrieta, CA Posts: 637	Re: Front Axle Spring Stud - Sway Bar Beautiful kits guys. Unfortunately I would like to stay away from spending 300 to 400 plus dollars on a kit that I will use for 2 studs - and only one project. I wish I could but Karl seems to have a "good" solution for me now. I have not taken apart the front axle perch bolt so that will be the next "how to" on my list. As always appreciate the advice.