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Hi there Try lifting the car in the air (suitable stands and safety of course) put it in neutral and handbrake off and spin the tailshaft one revolution - count the number of times the wheel spins - there's your ratio. Or maybe it's the other way round :) Anyway, one will spin faster that the other and the difference is the ratio. At the same time, see whether the wheels both rotate in the same direction to see if it's LSD. Cheers Jeremy Edited by user Tuesday, March 1, 2011 10:12:25 AM(UTC)
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The G will roll again.... eventually |
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Was sort of hoping that there would be numbers on there that could be decoded to tell me.....ah well... |
Do i own a Mustang....you have to be joking ??? |
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The only numbers for telling the ratio are on the outer of crown.
Here you will find the date code and the number of teeth for the crown wheel and pinion they are;- 3.36;1= Crown 37 & pinion 11 teeth
3.55;1= ----- 39 & ------ 11 -----
2.78;1= ----- 39 & ------ 14 -----
3.08;1= I think Crown is 40 and pinion 13.
Using equation 40 x 100 divided by 13 equals 307.6923 (roughly 3.08).
You will need to drain and remove the back cover on the diff housing.
Hope this has helped.
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quote:
Originally posted by Chevmad
Please excuse the uneducated but how do I determine the ratio in my Salisbury without taking off the cover...is it stamped on the collar at the yoke like on later cars ? Being 307 P/G my thoughts would be on 3.08 as this is the ratio most common in Camaro's in the US next to 2.78. Would have thought 3.36 or 3.55 would be reserved mostly for 4 speed cars ??
Will almost be guaranteed to be 3.08 or 3.36. Just work it out by engine revs at a road speed in top gear, calculate your tyre rpm and divide the engine rpm by tyre rpm. Being an auto you might have to estimate for torque converter slip. |
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