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Crown Victoria, Marauder, Marquis

Differential Question

4 posts 3 contributors 943 views
DO

Douglink92OP

  • Member since Feb 2016
  • 1 post
  • Sacramento, CA, USA
Feb 18, 2016 at 6:46 PM
How do i figure out the Gear ratio on my 2005 CVPI?
DB

dbmcd

Feb 18, 2016 at 8:47 PM
Look at the label inside the driver's door. It will list the axle code which will probably read Z5, which is 3.55:1. Or lift the rear end of the car and mark the tires and driveshaft. Rotate and count how many times the driveshaft turns relative to the tires.
HO

hondaclf

Feb 19, 2016 at 1:48 PM
Quote:
Look at the label inside the driver's door. It will list the axle code which will probably read Z5, which is 3.55:1. Or lift the rear end of the car and mark the tires and driveshaft. Rotate and count how many times the driveshaft turns relative to the tires.

Z5 is open 3.27 and the most common gear ratio so you were partially right.

The door sticker will have a 2 part axle code, you can decode it here.
Door sticker decoder
DB

dbmcd

Feb 19, 2016 at 4:21 PM
My '05 Shop Manual says 1is 2.73, 4 is 2.73, 5 is 3.55 and C is 3.27. I tried to insert photo of page but no luck. I seem to recall this conversation before.
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