This is Will's response to a question I asked back in 2005:
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The parts you want come from GM FWD A-bodies with HD brakes and work on the rear only. An A-body is a Chevy Celebrity, Pontiac 6000, Olds Ciera and Buick Century. You'll need the hub carrier, outer CV joint (will snap directly onto stock Fiero manual transmission axles), hub cartridge, brake rotor and brake caliper. You will lose your hand brake unless you do some more engineering.
If you have a manual transmission Fiero, it's a bolt in swap. If you have an automatic, you have smaller axles and will need to upgrade axles before it becomes a bolt-in swap.
The A-bodies with LD brakes have the same bolt pattern as the Fiero and same brakes as the Beretta.
This is from Will's post: Topic: "'84-'87 Rear suspension parts swaps" back in 2002.
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As many of us know, the front hub unit from a GM A-body with heavy duty brakes can be swapped into an early Fiero to give the Fiero the 5x115 bolt circle, and 10.25x1 vented rear brake rotors. However, there is no significant increase in possible wheel width with this swap.
I have noticed that C-body hub carriers are also very similar to Fiero hub carriers, except that they have significantly more distance between the mounting face of the bearing cartridge and the strut attaching bolts. The 16x8 wheels from a Turbo Grand Prix just barely fit with the A-body hub carriers. Initial estimates would indicate that the C-body hub carriers would allow an additional 1-1.5" of back spacing, making 16x9 or even 17x10 rear wheels possible. The unsprung weight penalty is probably similar to that of the A-body swap (13 lbs over stock). I believe the C-bodies have hub cartridges which are even bigger and stronger than the A-body units. The C-body brakes appear to be quite similar to A-body brakes, possibly even using the same parts.
Problems to overcome:
The C-body camber bolt holes are slightly closer together and slightly smaller than the Fiero camber bolt holes. This could be overcome by filing or grinding the Fiero struts, or by assembling hybrid struts with the C-body strut body, but the Fiero strut top. I believe that the later N- and J-bodies with 10.25" brakes also use this closer camber bolt pattern, so high end struts like Konis may be available.
The C-bodies use more conventional tapered shank ball joints. I haven't thoroughly investigated how to deal with this yet, but it would probably be possible with some work to the Fiero control arm. Who knows? The whole C-body control arm, or a Beretta or Cavalier control arm, might bolt up to the Fiero pivots. Has anyone else heard the sparse rumors I've heard of the Fiero's pinch bolt ball joints shearing under hard use? If the pinch bolt BJ's actually do shear, these tapered shank joints should be stronger.
C-body: '85-'93 Deville '85-'96 Park Avenue '85-'91(?) Fleetwood '85-'90 Electra '85-'96 Olds 98 Regency '87-'93 Olds touring sedan Since they reached so far into the '90's, they should also be available with ABS (wheel speed sensors).
Anyway, that's my take on that. Comments? Suggestions? Thoughts?
Does anyone have any experience with FWD H-bodies? I'll have to find one of those to poke around.
Synthesis: Yes, but the hubs would need to be redrilled to the 5x100 pattern.
[This message has been edited by RCR (edited 09-01-2008).]
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08:32 AM
Sep 12th, 2008
Khw Member
Posts: 11139 From: South Weber, UT. U.S.A. Registered: Jun 2008
About the Vw wheels qestion i knwo that 00-05 jetta golf and beetle wheels do fit the fiero however my 05 gti 17s stick out aobut an in on the front of my 88 coupe
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12:02 AM
tvelarde Member
Posts: 173 From: Washington State Registered: Feb 2004
I had a little time in a junk yard one day that had a Fiero in it. I pulled the Fiero seats and took the seat rails off. Then I pulled as many likely seats out of other cars, fitted the seat rails onto them and put them into the Fiero. Some were too wide but I found that the late model Saturn seats fit like a charm. I found some 2004 Saturn seats out of a perfect car, no damage anywhere, obviously towed behind a motorhome due to the tow stuff on the front. The seats are a multi-color grey and have a very nice feel to them. Best of all they were $32 out the door with the Fiero rails on them. Blazer S10 and Camaro seats also fit but were a tight fit width wise. I will have pictures of the Saturn seats on my web site at www.v8-fiero.us shortly.
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11:29 AM
wiccantoy Member
Posts: 3372 From: northwales , pa / Williamstown nj Registered: Mar 2002
I had a little time in a junk yard one day that had a Fiero in it. I pulled the Fiero seats and took the seat rails off. Then I pulled as many likely seats out of other cars, fitted the seat rails onto them and put them into the Fiero. Some were too wide but I found that the late model Saturn seats fit like a charm. I found some 2004 Saturn seats out of a perfect car, no damage anywhere, obviously towed behind a motorhome due to the tow stuff on the front. The seats are a multi-color grey and have a very nice feel to them. Best of all they were $32 out the door with the Fiero rails on them. Blazer S10 and Camaro seats also fit but were a tight fit width wise. I will have pictures of the Saturn seats on my web site at www.v8-fiero.us shortly.
as far as seats i can tell you i have a set of 93 caddy black leather seats i pulled from the yard. they fit a little tight but when in look like they should be there and are so comfortable. for the drivers side you need to put the ebrake in a new location. which is why i dont have them in my car yet.
------------------ DONE: 86gt 5 speed 4.9 complete rebuild with buds outback northstar pistons , delta cams E303 cam , full ported , polished , stronger head springs, and flow tested heads and manifolds. rockcrawl's custom chip , polished crank . too much to list
"Porvett" plate, owned since 1986, wife won't let me buy a real one so the Fiero is a great substitute..in fact, I prefer it over a real Vette (sorry Vette owners...me and my wierd little car are going places!!)
