OR and PRO have stronger differentials??

I was reading a thread today. Where a TW member was asked for advice on buying a new truck. OR vs. Sport.
One or two TW members replied he should get a OR due to it having different or stronger differentials.
Is this true? Not talking lockers here. That the OR and PRO have different differentials over the TRD Sport and SR models? This is the first I have heard of this. And to be honest I am skeptical.

 

All ORs, all Pros, and All MTs including the SR 5MT have the 8.75in diffs.

AT SRs, SR5s (AT only), AT Sports, and Limiteds (AT only) have 8.0in diffs.

 

Not necessarily stronger but larger

 

Why?

 

Necessity, larger differentials are stronger and can handle more shock loading.

 

Axle strength isn't a real concern with Toyotas, it's why they are so reknown.

The front CV axles will let you down 1000x before the rear axles break or fail.

The rear axles biggest weakness is over speed with one tire spinning.

 

Forces, and the resulting stress, decreases as the ring gear diameter increasing. So, yes by automotive tradition larger is stronger.

 

We did see a couple exploded rear diffs two winters back. I can't recall what they were, but it was shock loading while stuck.

 

I'm not employed by Toyota. I just know that what I said is true.

Love that GIF.

 

I have a 5 speed 4 bangin SR. my differential is rock solid

 

Not always true, I’ve seen large differentials grenade into a million pieces

 

I remember back when the 2nd Gens first came out, quite a few shit the rears too.

 

We all have however it takes significantly more force to break a larger diff. The reality is, larger diffs are stronger. If smaller diffs were equally as strong then people wouldn’t be putting 10.5” ring gears in their rock crawlers..and why larger vehicles for larger weights with greater power have them. There’s a reason 1-tons have a n 11.5” ring gear..

If I compare my 14 bolt to a Toyota 8.75 it’s night and day. I hope you dont also think that Dana 44 axles are just as strong as Dana 60s because some dude on the internet broke a 60 once..Otherwise it’s just trolling

 

Supposedly there was a massive defect, my local school had a ton of them donated to teach how to rebuild.

 

The 8.75 makes a harmonic whine between 50 and 60 mph. Sometimes it drives me nuts and other time not to bad, but its f*****g annoying and Toyota doesn’t seem to care.

 

So does the 8.0, did in my 2016 SR5, went through 2 diffs and a complimentary 125k/8yr warranty before Toyota let me trade the truck, but this was back in early 2016 before they deemed it normal.

 

Strong, like bull.

 

All i can say when back in the day racing a stock 66 gto that started with the stock 10 bolt pumpkin...didn't last more that a couple hole shots before being toast. I installed a chevy 12 bolt which held up for the rest of the season.

 

Larger diffs/ring gears distribute weight better, so can handle more force. That's just one piece of the puzzle though.

The housing and especially the axle shafts contribute to the strength of a differential. Everyone saying Dana 60's are stronger than Dana 44's are correct, but a marginal amount of that strength comes from the ring gear, and most comes from the beefy axle shafts.

tldr; larger ring gears are stronger, but between an 8" and 8.75" its probably marginal. And considering its hard to find many diff failures on the internet, we probably don't need to worry with either.

 

Backwards mate, 60 is stronger than a 44. That said the Toyota axle shafts are the almost the same diameter as my 14 bolt, just a smaller diff. Also don’t foget pinion size as well. The 8.75 is significantly bigger than the 8”, and bigger is better.

There are quite a few broken diffs but in general people don’t wheel Toyota’s as hard as jeeps or jeeps on tons so breakage is less simply because people aren’t pushing hard. Generally speaking, shafts break before diffs anyway.