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  #1  
Old 01-26-2002, 08:58 PM
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Join Date: Oct 2001
Location: Nawlins
Vehicle: 2005 Ford F-150
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3.03 to 3.73
I'm thinking about changing to a 3.73 rear diff but have a question for those that have this diff.

What are your RPMs like at around 80mph?

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  #2  
Old 01-26-2002, 09:40 PM
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Join Date: Feb 2000
Location: Kalamazoo, MI, USA
Vehicle: 2000 Ford F-150 7700 4x4
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About 2300
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Y2K™ Jim

Toreador Red, Keyless XLT SC SB 5.4L E4x4 4wDisc/ABS, 3.73LS, Skid, HD 7700# Towing, LT-245's on Chrome, Tube-Steps, Captain's, 6CD, Tonneau, named: "Nick"
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Old 01-27-2002, 08:21 PM
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'01 Camaro Z28 <- slow
'89 F-150 <- slower
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  #4  
Old 01-28-2002, 01:42 AM
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Location: Virginia Beach, VA
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Depends. Use one of the gear calculators. The Richmond gear website has one listed under Street Performance.

Measure your actual tire height, punch in the ratio for your tranny and it will show you what you are dealing with.
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