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| 1988 rear calipers aluminum or cast iron, please read looking for info (Page 1/1) |
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vette7584
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JAN 15, 04:47 PM
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a while back i purchased some 88 rear calipers from a member of Pennocks with the intentions of rebuilding them for spares. they have been sitting in a box on the shelf in my garage for months, so today, i decided to open the box, well, they look to be rebuildable cores, but here is what i found. the bridges for both are cast iron i would guess, and one of the main bodies is cast iron as well, but the other one is aluminum. does anyone know anything about this? the left main body is aluminum, the right is cast iron. any info would be appreciated!
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Raydar
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JAN 15, 04:56 PM
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I've seen this too, only one time.
The 88 Fiero shared calipers with one other car. The 6000 STE, IIRC.
I could only surmise that the iron caliper was for the 6000, and the aluminum caliper was for the Fiero. Never verified, but it made as much sense as anything else.
All of the 88 bridges seem to be iron.
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Raydar
88 Formula IMSA Fastback. 4.9, NVG T550
 
Praise the Lowered![This message has been edited by Raydar (edited 01-15-2020).]
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fieroguru
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JAN 15, 09:40 PM
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There are actually 3 widths of bridges that fit the 88 calipers - they are all steel bridges.
The Pontiac 6000 STE bridge is narrower than the 88 Fiero. This one was from the rear an on the STE application the rotor was solid, which is why the bridge was narrower. I haven't ever had one of these to know if the caliper piston body was cast iron, but it could be.
The 88 Fiero is in the middle...
The wider version is from a front caliper that uses a rotor wider than the 88 Fiero one, so the bridge is about 1/8" wider. The caliper body for this application is cast iron, but the spacing between the caliper mounting and the center of the piston is larger than the 88 Fiero one.
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vette7584
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JAN 15, 10:00 PM
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seeing as i cant post pics here, i did post pics of the piston housing on Pennock's on Facebook showing a magnet stuck to the piston housing. side by side with an aluminum one there is no difference, other than the obvious well maybe i can post pics, lets see if this works!
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vette7584
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JAN 15, 10:02 PM
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lol, guess i can post pics! here are the seal kits, you need to buy both and will have a few left over, but the absolutely contain ALL seals needed, including the piston seal.
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Will
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JAN 16, 03:10 PM
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| quote | Originally posted by vette7584:
seeing as i cant post pics here, i did post pics of the piston housing on Pennock's on Facebook showing a magnet stuck to the piston housing. side by side with an aluminum one there is no difference, other than the obvious well maybe i can post pics, lets see if this works! |
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That's pretty wild. I've only ever seen aluminum bodies on '88 calipers.
| quote | Originally posted by fieroguru:
There are actually 3 widths of bridges that fit the 88 calipers - they are all steel bridges.
The Pontiac 6000 STE bridge is narrower than the 88 Fiero. This one was from the rear an on the STE application the rotor was solid, which is why the bridge was narrower. I haven't ever had one of these to know if the caliper piston body was cast iron, but it could be.
The 88 Fiero is in the middle...
The wider version is from a front caliper that uses a rotor wider than the 88 Fiero one, so the bridge is about 1/8" wider. The caliper body for this application is cast iron, but the spacing between the caliper mounting and the center of the piston is larger than the 88 Fiero one.
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I used to have a 6000 SE AWD... It used vented rear rotors. I didn't realize that the FWD STE's used the same style calipers with narrow bridges and solid rotors.
What's the wider bridge from? That could be useful for upgrades.
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RacerX11
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JAN 16, 04:45 PM
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The FWD Pontiac 6000 STE with rear disc brakes used solid rotors, but the exact same caliper as '84-'87 Fiero rear calipers. [This message has been edited by RacerX11 (edited 01-16-2020).]
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Will
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JAN 16, 05:08 PM
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| quote | Originally posted by RacerX11:
The FWD Pontiac 6000 STE with rear disc brakes used solid rotors, but the exact same caliper as '84-'87 Fiero rear calipers.
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Yeah, that's what RockAuto showed me when I looked after posting what I did.
Looking into it a little deeper, the '89 6000 STE AWD had solid rear rotors that cross to a bunch of ChryCo products (funky!) and was the last year of the STE. The '90 6000 SE AWD shows vented rear rotors that are 1990 Pontiac 6000 *ONLY*... Lawd help you if you need rear brakes for that car.
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vette7584
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JAN 16, 09:17 PM
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if indeed the cast iron ones were for the Fiero only and cast for the 6000, makes you wonder why they would make both? i know cast must be cheaper, but by how much?
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