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Discussion Starter #1
I'm in the process of doing the rear disc brake swapout on my 1993 cat.

I figured while the brakes were in a mess, might as well get the bushings done. I thought I used to see them on RockAuto as Ford Parts Giant definitely does not have them.

Believe it or not, I got the top bushings, but the order at RockAuto appeared to be the lowers, but they confirmed they are out and sent me the rear frame (A) units they had by mistake. No worries as I'll use them when I do the shock and spring upgrade later on.

This is the rearward bushing pair on the lower knuckle. I'm reticent to re-use the old ones after 100k+ mileage and the junkyard ones also look scary.

Any thoughts for sourcing other than dealership New Old Stock (NOS)?

Below is the picture, apologies for the low bandwidth people and the large image.

5K790 (SZ-5K790-B) Rearward Bushing, "B" in the illustration, 1990/ 1997
 

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I have a whole set of rear lower arm to frame bushings in urethane. I think they also fit cobras with IRS I think the part number for them was 611BL. It was only like $60 or so to do all 4 lower to-frame bushings. I have had these for years without installing them, so I cant comment on how well they work.
 

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This is what I used last time;

http://www.rockauto.com/catalog/moreinfo.php?pk=203570

Moog is better than rattling.

DLF has made delrin parts in the past; I hope he decides to make more.
Thanks, I ordered those too but they are for the control arm at the IRS side (A part number suffix). Am looking for the knuckle lower to control arm.

No debate on the Moog, just not finding the part number anymore from Moog or in leftover stock.

I hope DLF makes Delrin bushings for these knuckles and the IRS to subframe insulators again. I would get a set of both too
 

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Discussion Starter #5
I have a whole set of rear lower arm to frame bushings in urethane. I think they also fit cobras with IRS I think the part number for them was 611BL. It was only like $60 or so to do all 4 lower to-frame bushings. I have had these for years without installing them, so I cant comment on how well they work.
Thanks, will look into that and see how they do.

By any chance, do you know which year and Mustang Cobra they were for?
 

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Thanks, I ordered those too but they are for the control arm at the IRS side (A part number suffix). Am looking for the knuckle lower to control arm.
The B part is the rear-most inner control arm to frame bushing.

The bushings in the control arm are only serviced as the whole knuckle now from what I can tell:

5A968 **SZ-5A968-B Knuckle And Hub Assy R.H., w/rear disc brakes, 1990/ 1997 1 $320.04

5A968 **SZ-5A969-B Knuckle And Hub Assy L.H., w/rear disc brakes, 1990/ 1997 1 $392.03


I put in a set of moog bushings there not too long ago; I'm not sure why they're not available now.
 

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I hope DLF makes Delrin bushings for these knuckles and the IRS to subframe insulators again. I would get a set of both too
I stock the Delrin Bushing Kits for the Knuckles......
 

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I stock the Delrin Bushing Kits for the Knuckles......
And I see after awhile of searching, you're the guy for orings for my crossover on my dohc engine, lol.

I need to search thru your website more carefully. :)

Are you still doing the steering u-joint?
 

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And I see after awhile of searching, you're the guy for orings for my crossover on my dohc engine, lol.

I need to search thru your website more carefully. :)

Are you still doing the steering u-joint?
Yes, I have a steering joint in stock. Buy one and I'll throw some o-rings in the box. ;)
 

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Discussion Starter #11
The B part is the rear-most inner control arm to frame bushing.

The bushings in the control arm are only serviced as the whole knuckle now from what I can tell:

5A968 **SZ-5A968-B Knuckle And Hub Assy R.H., w/rear disc brakes, 1990/ 1997 1 $320.04

5A968 **SZ-5A969-B Knuckle And Hub Assy L.H., w/rear disc brakes, 1990/ 1997 1 $392.03


I put in a set of moog bushings there not too long ago; I'm not sure why they're not available now.
Thanks for the clarifier, it wasn't the easiest to see in the diagram. You don't have the MOOG part numbers do you for the lower ones?
 

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Thanks for the clarifier, it wasn't the easiest to see in the diagram. You don't have the MOOG part numbers do you for the lower ones?
I don't believe that aftermarket stock style replacements are available for the lower two knuckle bushings.

Thanks, I have half the bushings already. If I can't find the units, I'll do the refund and put in for a set. Though it will be for a daily driver.
I have my Delrin Bushing Kits in all three of my cars. ;)

Thanks for the suggestion. I've not heard good things about the longevity and durability of urethane vs moog, motorcraft rubber, or delrin units but good to know the option is there.
Poly will soon compress and allow the knuckles to move fore and aft on the lower bolts.
 

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Yes, I have a steering joint in stock. Buy one and I'll throw some o-rings in the box. ;)
I will do that; but it will be a few weeks. I'm having a hood shipped... :)

With the konis, new hardware everywhere, firm tires, bracing everywhere; I can feel every bit of play in the whole car. :)

There's a bit of play in the lower ragjoint, and the left inner tie rod has a hair of play; The rack has 200k on it, and will get replaced whole, lol.

I'll pm you in about two weeks for the parts. :)
 

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Discussion Starter #16
I don't believe that aftermarket stock style replacements are available for the lower two knuckle bushings.



I have my Delrin Bushing Kits in all three of my cars. ;)



Poly will soon compress and allow the knuckles to move fore and aft on the lower bolts.

I was able to find new old stock (NOS) of the rubber pieces to get by, so tactically I'm good. I will be doing the full IRS cleanup when I get to the suspension which needs updating. I think that will be the time for Delrin, but for now will hang here with the rubber pieces.

I agree poly is going to be challenged in these heavy cars.
 
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