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View Poll Results: What differential do you use?
OEM Torsen
63
56.76%
OSGiken
34
30.63%
Carbontech Carbon
4
3.60%
Carbontech Metal
0
0%
Other
10
9.01%
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STR Prep - Differential Discussion

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Old 10-21-2011, 08:46 AM
  #21  

 
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Yep, that makes sense. Cool, so that sounds like replacing the side gears with a beefier one piece design actually does have a pretty good shot at fixing it
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Old 10-21-2011, 09:03 AM
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Originally Posted by Banannie
Originally Posted by IntegraR0064' timestamp='1319213742' post='21090025
[quote name='Banannie' timestamp='1319213440' post='21090004']
[quote name='IntegraR0064' timestamp='1319154627' post='21088216']
The failure according to Mark at Toyota Tsusho America (OS Giken's US distributor) is "cooking the oil" due to limited fluid capacity, which in turn can and did lead to a side gear failure. They are apparently now shipping units with strengthened side gears.

I would love to see pictures as well
I had two fail and the oil was just fine in both (no burned smell, etc). It was a very clear side gear failure (part / metal failure).
Hm, interesting. Thanks for posting - did the gear like, break in half or something (he had mentioned they used to be two piece) or was it tooth damage or something not related to being 2 pieces?
[/quote]

It looked like they used a generic side gear with an application specific piece pressed in for where the axles come in (yes, I know, not a very technical description, but hopefully you get it). Where those two metals met, it very clearly failed and sheared apart. Once the side gears failed, they took out the spider gears, and the whole thing got chunky - quick.

I hope to have the new diff very soon... unfortunately our season here is almost over
[/quote]
Pics?
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Old 10-21-2011, 01:06 PM
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Originally Posted by Billj747
Originally Posted by Banannie' timestamp='1319214872' post='21090097
[quote name='IntegraR0064' timestamp='1319213742' post='21090025']
[quote name='Banannie' timestamp='1319213440' post='21090004']
[quote name='IntegraR0064' timestamp='1319154627' post='21088216']
The failure according to Mark at Toyota Tsusho America (OS Giken's US distributor) is "cooking the oil" due to limited fluid capacity, which in turn can and did lead to a side gear failure. They are apparently now shipping units with strengthened side gears.

I would love to see pictures as well
I had two fail and the oil was just fine in both (no burned smell, etc). It was a very clear side gear failure (part / metal failure).
Hm, interesting. Thanks for posting - did the gear like, break in half or something (he had mentioned they used to be two piece) or was it tooth damage or something not related to being 2 pieces?
[/quote]

It looked like they used a generic side gear with an application specific piece pressed in for where the axles come in (yes, I know, not a very technical description, but hopefully you get it). Where those two metals met, it very clearly failed and sheared apart. Once the side gears failed, they took out the spider gears, and the whole thing got chunky - quick.

I hope to have the new diff very soon... unfortunately our season here is almost over
[/quote]
Pics?
[/quote]

I never got a close up of the side gear where it failed, just a pic showing "OMG that's a lot of chunks!" and the second diff wasn't as bad (I knew what to look / feel for better so we stopped and pulled the diff before it turned into a complete pile of metal shards)
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Old 10-21-2011, 01:08 PM
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Originally Posted by IntegraR0064
Yep, that makes sense. Cool, so that sounds like replacing the side gears with a beefier one piece design actually does have a pretty good shot at fixing it
Exactly why I'm willing to pay for a third diff to be put in... it was pure awesome when it worked!
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Old 10-21-2011, 03:32 PM
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After buying two and them breaking they'd be buying my third one.
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Old 10-21-2011, 03:43 PM
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I've bought one diff, just 3x install
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Old 10-21-2011, 04:48 PM
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That's fair
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Old 10-21-2011, 04:52 PM
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Originally Posted by Banannie
Originally Posted by Billj747' timestamp='1319216628' post='21090196
[quote name='Banannie' timestamp='1319214872' post='21090097']
[quote name='IntegraR0064' timestamp='1319213742' post='21090025']
[quote name='Banannie' timestamp='1319213440' post='21090004']
[quote name='IntegraR0064' timestamp='1319154627' post='21088216']
The failure according to Mark at Toyota Tsusho America (OS Giken's US distributor) is "cooking the oil" due to limited fluid capacity, which in turn can and did lead to a side gear failure. They are apparently now shipping units with strengthened side gears.

I would love to see pictures as well
I had two fail and the oil was just fine in both (no burned smell, etc). It was a very clear side gear failure (part / metal failure).
Hm, interesting. Thanks for posting - did the gear like, break in half or something (he had mentioned they used to be two piece) or was it tooth damage or something not related to being 2 pieces?
[/quote]

It looked like they used a generic side gear with an application specific piece pressed in for where the axles come in (yes, I know, not a very technical description, but hopefully you get it). Where those two metals met, it very clearly failed and sheared apart. Once the side gears failed, they took out the spider gears, and the whole thing got chunky - quick.

I hope to have the new diff very soon... unfortunately our season here is almost over
[/quote]
Pics?
[/quote]

I never got a close up of the side gear where it failed, just a pic showing "OMG that's a lot of chunks!" and the second diff wasn't as bad (I knew what to look / feel for better so we stopped and pulled the diff before it turned into a complete pile of metal shards)
[/quote]
Pics?

They would be a lot more valuable to this thread. Who else had failires besides you and what suspension and size/model tires do you run?
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Old 10-25-2011, 02:46 PM
  #29  

 
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Originally Posted by Billj747
Originally Posted by Banannie' timestamp='1319231198' post='21091011
[quote name='Billj747' timestamp='1319216628' post='21090196']
[quote name='Banannie' timestamp='1319214872' post='21090097']
[quote name='IntegraR0064' timestamp='1319213742' post='21090025']
[quote name='Banannie' timestamp='1319213440' post='21090004']
[quote name='IntegraR0064' timestamp='1319154627' post='21088216']
The failure according to Mark at Toyota Tsusho America (OS Giken's US distributor) is "cooking the oil" due to limited fluid capacity, which in turn can and did lead to a side gear failure. They are apparently now shipping units with strengthened side gears.

I would love to see pictures as well
I had two fail and the oil was just fine in both (no burned smell, etc). It was a very clear side gear failure (part / metal failure).
Hm, interesting. Thanks for posting - did the gear like, break in half or something (he had mentioned they used to be two piece) or was it tooth damage or something not related to being 2 pieces?
[/quote]

It looked like they used a generic side gear with an application specific piece pressed in for where the axles come in (yes, I know, not a very technical description, but hopefully you get it). Where those two metals met, it very clearly failed and sheared apart. Once the side gears failed, they took out the spider gears, and the whole thing got chunky - quick.

I hope to have the new diff very soon... unfortunately our season here is almost over
[/quote]
Pics?
[/quote]

I never got a close up of the side gear where it failed, just a pic showing "OMG that's a lot of chunks!" and the second diff wasn't as bad (I knew what to look / feel for better so we stopped and pulled the diff before it turned into a complete pile of metal shards)
[/quote]
Pics?

They would be a lot more valuable to this thread. Who else had failires besides you and what suspension and size/model tires do you run?
[/quote]
I don't have a place to publicly host the pics to link to here.

I have Penske double adjustables and multiple sets of wheels / tires (pretty much all STR options)
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Old 10-25-2011, 02:57 PM
  #30  

 
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Originally Posted by Banannie
I don't have a place to publicly host the pics to link to here.
I can host the pics you email them to me.
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