Brakes Does anyone know specific casting numbers on 1989 GT O.E. Calipers?

MrBottleneck · Apr 14, 2020

I was told brake calipers casting numbers 355L & 356R where on the 1990-1993 models and the 406 casting number and subsequent other side number etc where on earlier like 1987-1989 models.
These are stamped on outside of piston cup area of calipers.
Can anyone verify for me what castings for sure for what years specifically the 1989 (must be from unmolested original car)?

Thanks

Mustang5L5 · Apr 15, 2020

I think the problem you will run into is finding someone who has a car still wearing the original brake calipers, and knows they are the original calipers. Most reference materials list the 87-93 calipers are completely interchangible, so any replacements at some point in the lift of the car would get a caliper from anywhere in that year span.

You need to find someone with a low-mileage, 100% original car that can guarantee they are the correct calipers. Not sure how many of those cars are on this site.

Doing a concours correct resto?

MrBottleneck · Apr 15, 2020

No, actually my 1989 car is all original with 40232 miles. I’m doing research to see when the cutoff dates where on casting numbers looks like the castings starting in 4 was 87-91 and the castings starting in 3 where 92-93.
Just looking for another person with an all original to verify.

Mustang5L5 · Apr 15, 2020

Gotcha,

Unfortunately i'm no use. My original calipers are long gone. I think many will be in the same situation

General karthief · Apr 16, 2020

Mine say 405L on the left one. I don't remember if I replaced the calipers when I did the brakes years ago. They are ford parts though.
89 gt 5 speed
Maybe @FoxChasis can help here. It may take him a minute.

MrBottleneck · Apr 16, 2020

That sounds correct for the 1989.
Thanks for input.

General karthief · Apr 16, 2020

Funny how things go, I knew I needed to check the pads on the front for wear and your post reminded me of that, it's jacked up in the shop while I work on many other things on it so when I looked for the numbers I noticed the outside pad was worn past 50% but the inside pad looks more like less than 25% so I may have an issue I need to address, thanks for needing info.

MrBottleneck · Apr 17, 2020

Check to make the caliper slides are not frozen up. Sounds like that might be the issue.

General karthief · Apr 17, 2020

MrBottleneck said:
Check to make the caliper slides are not frozen up. Sounds like that might be the issue.

I KNOW! Looking at all the surface rust on them things you would think I live in the snow belt and drive it year round!
I can't see how those things can work properly. Didn't they have some rubber boots on those pins?

MrBottleneck · Apr 17, 2020

Yes, the pins had rubber boots.
Heres a set so you know.
https://lmr.com/item/LRS-H5012K/1987-93-Mustang-50L-Front-Brake-Caliper-Bolt-Hardware-Kit

fox racer v2 · Apr 17, 2020

MrBottleneck said:
No, actually my 1989 car is all original with 40232 miles. I’m doing research to see when the cutoff dates where on casting numbers looks like the castings starting in 4 was 87-91 and the castings starting in 3 where 92-93.
Just looking for another person with an all original to verify.

Can help you in a few months - upgrading my setup last week of May (with any luck) and I'm very certain mine's all original.

My 89LX was built Jan 16 '89

General karthief · Apr 18, 2020

MrBottleneck said:
Yes, the pins had rubber boots.
Heres a set so you know.
https://lmr.com/item/LRS-H5012K/1987-93-Mustang-50L-Front-Brake-Caliper-Bolt-Hardware-Kit

Thanks, I ran across that last night while doing some research, I gots some shop'n to do.

Brakes Does anyone know specific casting numbers on 1989 GT O.E. Calipers?

MrBottleneck

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Mustang5L5

That is…until I whipped out my Bissell

MrBottleneck

Member

Mustang5L5

That is…until I whipped out my Bissell

General karthief

wonder how much it would cost to ship you a pair

MrBottleneck

Member

General karthief

wonder how much it would cost to ship you a pair

MrBottleneck

Member

General karthief

wonder how much it would cost to ship you a pair

MrBottleneck

Member

fox racer v2

Active Member

General karthief

wonder how much it would cost to ship you a pair

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Brakes Does anyone know specific casting numbers on 1989 GT O.E. Calipers?

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That is…until I whipped out my Bissell

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wonder how much it would cost to ship you a pair

Member

wonder how much it would cost to ship you a pair

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wonder how much it would cost to ship you a pair

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wonder how much it would cost to ship you a pair

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