Author Topic: Calculating the diff ratio  (Read 1199 times)

Offline dlrogers

  • Jr. Member
  • **
  • Posts: 134
  • 1971 Challenger 383
Calculating the diff ratio
« on: April 10, 2006 - 01:27:54 AM »
 :nzflag:
Hi all
This may be a dumb question but...is it possible to calculate the gear ratio in the diff by rotating the wheel a full turn and counting the number of revolutions the drive shaft turns through??? Or any other way you could suggest - my speedo reads quite fast and I need the ratio to order the correct drive wheel for the end of the speedo cable. Any help would be gratefully received.
Cheers

David
Bay of Islands, New Zealand




Offline ShelbyDogg

  • Sr. Resident
  • ******
  • Posts: 5007
Re: Calculating the diff ratio
« Reply #1 on: April 10, 2006 - 12:35:55 PM »
Thank link is dead, so to answer the question, YES, one turn if there is a posi in it.  If not a posi, 2 full turns with the other tire still on the ground. Counting the driveshaft revs.
Rob
Rob

3 E-bodies, Megasquirt-1v3.0, Edelbrock Pro-Flo-1, Holley C950, FAST EZ-EFI; say no to carbs...yes to throttle bodies

My Pace Car restoration thread:
http://www.cuda-challenger.com/cc/index.php?topic=44869.0


Offline dlrogers

  • Jr. Member
  • **
  • Posts: 134
  • 1971 Challenger 383
Re: Calculating the diff ratio
« Reply #2 on: April 10, 2006 - 01:30:15 PM »
OK, thanks for that.
Cheers
David
Bay of Islands, New Zealand

Offline 73EStroker

  • Sr. Member
  • ****
  • Posts: 1343
Re: Calculating the diff ratio
« Reply #3 on: April 16, 2006 - 04:37:30 PM »
Hey DL, I am in Pukekohe and will be somewhere near Whangarei, Matapouri, Hukeranui late this week. Email me at ntgolden.xtra.co.nz or phone 092388643. Also if NZ440R/T reads this much the same as well. I will be at the V8 races at Pukekohe this coming weekend.
Barry (Salmon Arm)