so nutz is wrong?Quote:
Originally Posted by bburris
;) :D
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so nutz is wrong?Quote:
Originally Posted by bburris
;) :D
Are you trying to say that a 9" with 3.55s is WEAKER than with 4.88s?
Yes.
Please explain.
as the pinion changes size, so does the thickness of the ring. im sure the happy medium is somewhere in between, but im sure there are weak points on both ends of the spectrum. offroaders just deal with the small pinion end of the spectrum. we dont worry about the thin ring end of it.
I think that's right...like ring gear thickness is the weak point on a 9", whereas ring tooth thickness is the weak point on a high numeric ratio 8"
Have you ever seen how thick a 9" ring gear is?
"weak point" is a relative term
to contradict brett, no a 3.54 is stronger than 4.88Quote:
Originally Posted by uglyota
a 3.54:1 will have better gear mesh than a 4.88:1. more teeth on the pinion. the only way for it to be stronger is to go up in ring gear size.
think of it this way, (chadnutz touched on it) on 3.54:1 you will have more teeth spreading the torque load than you would on a 4.88:1 b/c the 4.88 needs less teeth to spin the diff/ring gear slower.
and no I'm not talking about chicks from Beaumont! :flipoff2:
grayson's mesh area theorum is correct, but to add to it i think a lot of what pinion strength has to do with is the length of the moment arm created by the size of the pinion. for a given torque input to the pinion: the smaller the pinion, the smaller the moment arm, this requires the force on the gear teeth to be greater in order to transmit said torque. like a lever, try to move 500lbs with a short lever and try it with a long lever. see which is easier.
whereas on the ring gear the moment arm is constant, the only change is the ring gear thickness. however, it transmits its torque through the frictional forces between it and the carrier. so, i dont think ring thickness is as detrimate to strength as pinion size. so, because of this and what grayson said, im gonna say the higher (lower numerically) you go the stronger it will be, up to a certain point of course.
yalls rational about higher(numerically lower) gears being stronger then lower(numerically higher) is correct with all gearsets EXCEPT the Ford 9". as the gearsets on a ford 9" get deeper(numerically higher) they get stronger because of the increase in contact patch. there is a website that shows this but i cant seem to find it at the moment
Quote:
Originally Posted by StevenAg03
if you find it post it up. id like to see it.
I've been trying to find it but the bookmark I had was dead and I can't find it on Pirate now. I thought it was on Sunray's sight, but the info they have on their site now isn't what I'm thinking of...
it wasnt sunray...but i did find a comparison picture of what the different pinions look like on there web site
You contradict yourself here.
You said:
Y'all are right about num. higher being stronger on all except the 9".
Then you said:
The 9" get stronger when gears are numerically higher.
Quote:
Originally Posted by StevenAg03