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3rd Gen Ram Tech 2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

Minimum Rotor Thickness

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Old 09-17-2008, 10:08 PM
Ram04Rules Ram04Rules is offline
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Question Minimum Rotor Thickness

OK, my Ram was built in March 04. The factory service manual lists the minimum thickness for the rear brake rotors at 1.117 inch. That can't be right because mine measure 0.863 inch, and there is still plenty of brake pad left. I special ordered the truck from the factory and the brakes have never been worked on. I used a calibrated micrometer, so I know my measurement is correct. The front rotors fit the spec limit listed in the manual for those, so only the rear brake rotors are a puzzle. I'm wondering if they made a running change during the model year and went to a thinner rotor.

I know there must be several of you out there that have the 05 Ram service manual. What does the manual list for the minimum rotor thickness for the rear brake rotors of a 1500 series (LD) 2005 Ram?
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2004 Ram 1500 Laramie Reg Cab, Atlantic Blue, 5.7L, 4x4, Long Bed, Heated Leather, Sirius, Power Steps, Side Air Bags
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Old 09-18-2008, 02:49 PM
kenihemi kenihemi is offline
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Posts: 946

My 04 manual say;

Measure rotor thickness at the center of the brake
shoe contact surface. Replace the rotor if below minimum
thickness, or if machining would reduce thickness
below the allowable minimum.
Rotor minimum thickness is usually specified on
the rotor hub. The specification is either stamped or
cast into the hub surface.
04 Ram, QC, 4X4 Hemi
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Old 09-18-2008, 08:05 PM
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MikeHTally MikeHTally is offline
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Vehicle: 2003 1500 QCSB Hemi 4x2
Location: N. Florida
Posts: 4,460

My '03 shop manual has this info. There's almost a contradiction.
Front Disc Brake Rotor 33628 mm (13.21.1in.)
Front/Rear Disc Brake Rotor Max. Runout 0.127 mm (0.005 in.)
Front/Rear Disc Brake Rotor Max. Thickness Variation 0.025 mm (0.001 in.)
Minimum Front Rotor Thickness 26.4 mm (1.039 in.)
Mininium Rear Rotor Thickness 28.39 mm (1.117 in)
Rear Disc Brake Rotor 350x22 mm (.86 in)
2003 1500 QC Hemi

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2008 1/2 Mazda Speed3
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Old 09-18-2008, 11:01 PM
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HemiLonestar HemiLonestar is offline
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I posted the page under your other post, but here's the chart anyway:
Click the image to open in full size.

2006 Charger R/T & 2003 Ram 1500 QC Hemi Lonestar Edition "Big Red"
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Old 09-18-2008, 11:01 PM

2003, chart, dodge, minimum, ram, rotor, srt10, thickness

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