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School me on 9" ratios

Wfoyota said:
Because others are price gouging. Id trust ECGS spool over another potential no name spool 10 to 1.
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ECGS website, who is price gouging? Why does it cost more for 30 spline? More price gouging?
Screenshot 2024-02-05 152715.png
 
Bebop said:
Exactly.
Which is why 14 bolt is the winner in my book, again and again.

$500 40sp spool.
$500 R&P + install kit
$100 forged yoke

In a $1000ish dropout case with a $1000ish housing,

I'd say this would be a lovely option.
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It pains me to feed the bouncer ego, but you're right :flipoff2:

Just saw a post by Trevor at WFO talking to Kevin Yoder. He's running a drop out 14b rear and has 4 seasons on the same gears including KOH. :smokin:

I know he's not top top level like Gomez, Currie, ect. But that's a heavy rig with big power and heavy tires.
 
posford said:
The majority are not $145 if you look around. IDK why that one is so cheap compared to others
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I don't either...they are all basically the same thing. No reason for them to cost more frankly.
 
Tech Tim said:
Heat treated chromoly isn't simple. First off that would be a big chunk of Chromo ($$$$), then the roughing in machining, then the heat treat, then the finish machine work to get everything straight again.

There is way more than an hour of work in it.
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Simple compared to a locker with actual moving parts....
 
Wfoyota said:
ECGS website, who is price gouging? Why does it cost more for 30 spline? More price gouging?
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I'm sure it has to do with volume...which would explain why less common spools and splines are more expensive.
 
And the ECGS branded Ford 9" 35 spline spool is $139. Funny too...the 40 spline Ford 9" by Yukon at ECGS is $296.

I'm sure a TON of that price difference is made in the USA vs. India/China/Indonesia, etc. In most cases, I'd buy USA made stuff over foreign....just b/c we do so little manufacturing anymore in the US that I try to support it where I can. I have no doubts the GW spool is a higher quality spool....though I doubt I'd ever break an Indian/Chinese one either.
 
Tech Tim said:
Who out there is running deeper that the 5.43 (so close to 5.38)?



The main problem with the 10" gearsets is they are still riding on a 9" diff.
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Not really, 35 spline and up is different. Bearing size goes way up.
 
Tech Tim said:
What the ID of the ring gear?
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Pretty sure I agree with your point. It's a technicality that the diff is 'different' b/c it has larger bearing journals to accommodate larger shafts. Where it counts, in the OD of the carrier, it's the same size (at least AFAIK)...and that's the limitation in strength.
 
Sean said:
Pretty sure I agree with your point. It's a technicality that the diff is 'different' b/c it has larger bearing journals to accommodate larger shafts. Where it counts, in the OD of the carrier, it's the same size (at least AFAIK)...and that's the limitation in strength.
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:beer::beer::beer:
 
Tech Tim said:
:beer::beer::beer:
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That does beg the question: How much larger can you make the carrier OD and not too drastically weaken the larger 10-10.5" ring gear by increasing its ID to accommodate the larger carrier.
 
Sean said:
That does beg the question: How much larger can you make the carrier OD and not too drastically weaken the larger 10-10.5" ring gear by increasing its ID to accommodate the larger carrier.
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I imagine you could make it as big as a 14 bolt carrier.
 
Sean said:
That does beg the question: How much larger can you make the carrier OD and not too drastically weaken the larger 10-10.5" ring gear by increasing its ID to accommodate the larger carrier.
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The problem is the architecture. If you are going to grow the 9", then grow the whole thing, not just the ring gear OD.

Grow the pinion, move the pinion to RG mesh away from the centerline so you can increase the ID of the ring gear and stuff in a larger diff.

I love all that they've done to the 10"/9" stuff, but by the time they are done making the 9" stronger, they could've gone ahead and do a complete redesign. They are making new 3rds, new differentials and new ring and pinions anyway, so why not make things a little bigger?
 
Tech Tim said:
The problem is the architecture. If you are going to grow the 9", then grow the whole thing, not just the ring gear OD.

Grow the pinion, move the pinion to RG mesh away from the centerline so you can increase the ID of the ring gear and stuff in a larger diff.

I love all that they've done to the 10"/9" stuff, but by the time they are done making the 9" stronger, they could've gone ahead and do a complete redesign. They are making new 3rds, new differentials and new ring and pinions anyway, so why not make things a little bigger?
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Because the poors won’t buy them when they can do a SD60 and a 14B and nickel & dime themselves to death instead?
 
Tech Tim said:
The problem is the architecture. If you are going to grow the 9", then grow the whole thing, not just the ring gear OD.

Grow the pinion, move the pinion to RG mesh away from the centerline so you can increase the ID of the ring gear and stuff in a larger diff.

I love all that they've done to the 10"/9" stuff, but by the time they are done making the 9" stronger, they could've gone ahead and do a complete redesign. They are making new 3rds, new differentials and new ring and pinions anyway, so why not make things a little bigger?
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100% in agreement.
 
JR4X said:
Torq two point oh?
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Kinda.
Except he delivered bad parts and took 4 months to correct the mistake.

Mistake got corrected, but it took a shit ton of follow up, tons of "oh it's shipping today", etc etc.



In the end I got the product but that's not an experience I'd renew. Especially for 4k$ per axle. That's more than a loaded GW HP10 and a TG housing.
 
JR4X said:
That’s cool 😎! Never heard of them, anybody know anything about them?
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I've been following them on FB for a few years, they are always posting up some cool machine pron.

www.facebook.com

Innovative Machining Solutions | Vienna ME

Innovative Machining Solutions, Vienna, Maine. 5,020 likes · 3 talking about this. IMS provides cost effective design and machining services to our customer base. From one off protot
www.facebook.com www.facebook.com

I've never dealt with them, but I remember Bebop griping about them in the past.
 
Tech Tim said:
The problem is the architecture. If you are going to grow the 9", then grow the whole thing, not just the ring gear OD.

Grow the pinion, move the pinion to RG mesh away from the centerline so you can increase the ID of the ring gear and stuff in a larger diff.

I love all that they've done to the 10"/9" stuff, but by the time they are done making the 9" stronger, they could've gone ahead and do a complete redesign. They are making new 3rds, new differentials and new ring and pinions anyway, so why not make things a little bigger?
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Is there Anything 9" left on a tube works 3rd? Do they still use the same mounting pattern even?
 
Tech Tim said:
What the ID of the ring gear?
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Same, but that isn't an issue in my opinion. Going 1" larger on the BC isn't going to cut down on flex that much. A load bolt pretty much eliminates any difference in strength anyway. If you're running a spool, carrier size isn't an issue either.
 
bdkw1 said:
Same, but that isn't an issue in my opinion. Going 1" larger on the BC isn't going to cut down on flex that much. A load bolt pretty much eliminates any difference in strength anyway. If you're running a spool, carrier size isn't an issue either.
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Increasing the ID will allow a bigger carrier, which will allow bigger internal gearsets.

Obviously not an issue for those running spools.
 
bdkw1 said:
Same, but that isn't an issue in my opinion. Going 1" larger on the BC isn't going to cut down on flex that much. A load bolt pretty much eliminates any difference in strength anyway. If you're running a spool, carrier size isn't an issue either.
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Spools definitely have their place, but for 4WS trail/crawler cars, a tcase with front dig and a selectable rear locker are huge assets...and that's where the 9" falls short.

Granted, I'm not sure there's a big enough market any more to cater to that crowd by building a bigger/stronger 9", but like TechTim said, if you're already beefing up everything else and basically custom making all the components for the 9" why not go the whole way?
 
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