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how can i tell my diff ratio
https://auszookers.com/forum/viewtopic.php?f=37&t=48152		 Page 1 of 1
Author:  bibby [ Fri Oct 17, 2014 1:30 pm ]
Post subject:  how can i tell my diff ratio
hey guys i just am wanting to buy a NT diff center which is 3.9 gearing but the person dosent know if its a NT or WT center is there anywhere on the crown gear or something where you can work it out?
Author:  matth27 [ Fri Oct 17, 2014 2:48 pm ]
Post subject:  Re: how can i tell my diff ratio
Count the teeth on the crown wheel and divide them by the number of teeth on the pinion
Author:  bibby [ Fri Oct 17, 2014 3:01 pm ]
Post subject:  Re: how can i tell my diff ratio
There in the housing its kinda hard to count
Author:  atari4x4 [ Fri Oct 17, 2014 3:11 pm ]
Post subject:  Re: how can i tell my diff ratio
Check the circle spin ratio...
Author:  bibby [ Fri Oct 17, 2014 3:39 pm ]
Post subject:  Re: how can i tell my diff ratio
How? Or where??
Author:  killazook [ Fri Oct 17, 2014 6:12 pm ]
Post subject:  Re: how can i tell my diff ratio
Ratio is 3.9:1
Jack the car up mark the tyre and the tail shaft spin tail shaft about 3.9 times so roughly 4 tyre should of made 1 revolution not accurate but thats the only other way with taking it out
Author:  bibby [ Fri Oct 17, 2014 11:40 pm ]
Post subject:  Re: how can i tell my diff ratio
It is out though
Author:  atari4x4 [ Fri Oct 17, 2014 11:47 pm ]
Post subject:  Re: how can i tell my diff ratio
is the diff centre out of the housing, if so count the teeth as discribed.... if the diffs are complete but not fitted to the car, do what killa zook said & measure the circle spin ratio by turning the tailshaft & seeing how far the axle turns.
Author:  bibby [ Sat Oct 18, 2014 12:10 am ]
Post subject:  Re: how can i tell my diff ratio
The center is out but the pinion is behind all the crown gears and stuff its okay mine are nt and the ones i bought are wt
Author:  atari4x4 [ Sat Oct 18, 2014 12:33 am ]
Post subject:  Re: how can i tell my diff ratio
WTF, i was confused before, now i'm confuddled. :? :lol:

count the teeth on the crown wheel... put a paint mark on the 1st one & start counting, same goes with the pinion.
Image

the pinion gear is the star shaped one below where the hose connects to the top. (it's a vacuum operated GV front diff so ignore the crap)
Author:  fordem [ Mon Oct 20, 2014 1:04 am ]
Post subject:  Re: how can i tell my diff ratio
OR - mark the crown wheel and rotate the input flange - how many revolutions of the input for one revolution of the crown wheel?
Author:  Jazzor [ Tue Oct 21, 2014 10:58 pm ]
Post subject:  Re: how can i tell my diff ratio
NT difs have 8mm holes in the flange and WT difs have 10mm holes in the flange MOST of the time (I have heard there is some odd models or people could have swapped flanges). That's how I tell them apart in my spares collection ;).
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