Has anyone found a source for the bushings on the sissor assembly for the power windows?

It’s the bushings that rotates in the tracks.

What I found out is the bushing (wheel) will seize and won’t rotate, making it not turn freely, and making an annoying sound while putting the window up.

Thanks,

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fierogt28

88 GT, Loaded, 5-speed.
88 GT, 5-speed. Beechwood interior, All original.

Window regulator rollers
https://www.dormanproducts.com/p-8469-74430.aspx

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My World of Wheels Winners (Click on links below)

3.4L Supercharged 87 GT and Super Duty 4 Indy #163

I had the same issue when refurbishing my '84 Chevy K10, but be warned....

The Chevy part is called 'Roller & Rivet' (bushings/wheels) and they were frozen too.

I brought the parts like fierosound linked; removed the old rivets out but I 'failed' to expand the new rivets properly.

Creating a new "head" on the tail end by 'smashing' the material flatter was very difficult. You need a press and dies to do the job properly.

My best solution was to buy new scissor assemblies which were called 'regulators'.

Edit: Dorman's 74430 Window Rollers comes a package of 3 rollers:

TWO rivet type and ONE type with threads a nut.....

[This message has been edited by Vintage-Nut (edited 08-17-2023).]

my solution was to painstakingly un-seize the roller manually with a lot of spray and time, then grease the heck out of it.

The Dorman option is likely better than that.

quote Originally posted by Vintage-Nut: I brought the parts like fierosound linked; removed the old rivets out but I 'failed' to expand the new rivets properly. Creating a new "head" on the tail end by 'smashing' the material flatter was very difficult. You need a press and dies to do the job properly.

I don't have a picture, but I used a chisel to stamp a "+" on the end to expand it and lock it in place.

I'm not arguing....

My Chevy window roller rivets were 'solid' while the Dorman's 74430 rivet photos show they're 'hollow' which may be easier to expand them.

The roller still needs support under the head of the rivets as hamming the chisel, which I said "was very difficult" to me.....

The roller shrink and won't move over time.
Wrong oil/grease only makes this worse if even seems to work right now.

Many carefully pry off Dorman rollers then replace OE roller and lube w/ brake grease that doesn't attack plastic. Permatex Green brake grease is better then silicon.
That way don't replace the pivots as most of them are ok.

If careful, can try to pry off OE rollers but is old and can break getting off or on after cleaning etc to make them roll again.

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The Ogre's Fiero Cave

I want to chime in with a bit of info on the other rollers on our windows. My window was not working correctly (Manual window) drag and noise- found out that the roller in the vertical track was not spinning properly. I found a Dorman replacement...drilled out the old stud/roller assembly and installed the new Bolt-on part...but the Stud is longer than the original; Although it works ok, it is definitely not correct and more force needed to roll the window up.

But what really fried my fritters was that shortly after all of this, I found a post somewhere about replacing that roller- You can pry the new roller off, and snap it in place rather than removing the (Proper-length) old stud.

Keep this in mind if you are ever replacing that stud/roller!

[This message has been edited by cvxjet (edited 08-17-2023).]

I've posted this before here about the Dorman part:

"Unfortunately the diameter of the dorman roller is smaller than the Fiero's. I don't know if it makes a difference."

88 Fiero manual window rollers measured OD = 1.083"

Dorman 74430 OD = .95" to .97"

I pulled off my old rollers, cleaned them thoroughly, re-greased them and reinstalled them. They work like new.

Here is the tool I used to remove the old rollers:



I used a bench vise to reinstall them. I hope this info helps you.

quote Originally posted by cvxjet You can pry the new roller off, and snap it in place rather than removing the (Proper-length) old stud.

Hey cvxjet - your photo looks different than Dorman's 74430 Window Rollers.

What brand and p/n of the rollers you bought?

Thanks guys for the responses and effort.
But, it there a GM replacement than Dorman?
If what someone reported that the Dorman wheel is smaller and the OEM GM part is bigger in diameter, I’d like to trace the stock part / size.
Nothing wrong knowing if the correct “exact” part is still available.

Keep the ideas coming if you have more.

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fierogt28

88 GT, Loaded, 5-speed.
88 GT, 5-speed. Beechwood interior, All original.

No GM Roller Part Number

These rollers were included in the window regulator assemblies which are discontinued.....

quote Originally posted by cyrus88: "Unfortunately the diameter of the dorman roller is smaller than the Fiero's. I don't know if it makes a difference." 88 Fiero manual window rollers measured OD = 1.083" Dorman 74430 OD = .95" to .97"

Won't matter. The regulator/lift arms just moves a little more to close the window.

To Vintage-nut,

I guess our best bet is to find good used Fiero specific assemblies or similar assemblies from another GM car in that era to get good used parts…

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fierogt28

88 GT, Loaded, 5-speed.
88 GT, 5-speed. Beechwood interior, All original.

quote Originally posted by theogre: Won't matter. The regulator/lift arms just moves a little more to close the window.

Let's hope so. I was just worried that I would hear the window rattle while driving, so I didn't take the chance.

quote Originally posted by fierogt28 I guess our best bet is to find good used Fiero specific assemblies....

To me, yes and the Fiero window regulator assemblies are the only options with no interchange or cross-reference.......

quote Originally posted by Larry Hubbert in Feb-2021: I have several sets of complete window regulators for 88 Fiero GT's and Formulas with electric windows (also have motors), however F.Y.I. all the Fiero Regulators are the same for all years 85 through 88. All of my regulator sets came out of Fiero's that were not in accidents and were turned into parts cars due to lack of titles, etc. If you are interested I can send you HiRes pix of the regulator sets I presently have, along with the price I'm asking, plus shipping cost. Please email me at LHUBBERT2@BRIGHTHOUSE.COM

Edit to Add:

Searching the forum; it seems that many members replaced the window regulator rivets with (stainless) 1/4" bolts and nylock nuts.

[This message has been edited by Vintage-Nut (edited 08-19-2023).]