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Aftermarket gears in factory 4.88 3rd

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Old 07-01-2014, 08:08 AM
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Aftermarket gears in factory 4.88 3rd
I grenaded a 4.88 rear yesterday and someone could rebuild it for me but I thought you can't put aftermarket gears in the 4.88 thirds
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Old 07-01-2014, 08:10 AM
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You can't. lol factory 4.88s must go in a factory 4.88 differential.
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Old 07-01-2014, 08:13 AM
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Originally Posted by MaK92-4RnR
You can't. lol factory 4.88s must go in a factory 4.88 differential.
^^ this.
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Old 07-01-2014, 08:16 AM
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Originally Posted by MaK92-4RnR
You can't. lol factory 4.88s must go in a factory 4.88 differential.
Okay that's what I thought it can't be done. Thanks for the confirmation
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Old 07-01-2014, 08:23 AM
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How did yours grenade? Do you have a locker?
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Old 07-01-2014, 08:26 AM
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factory 4.88s are not very strong. its typical. I ran mine with lockers and they were fine with 33s.
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Old 07-01-2014, 08:44 AM
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Is that the issue because factory? I would assume the quality is there from Toyota but guess it failed. What's the reasoning aftermarket gears won't fit the 4.88 housing? I'm running only 33s
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Old 07-01-2014, 08:57 AM
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Originally Posted by Edionne13
Is that the issue because factory? I would assume the quality is there from Toyota but guess it failed. What's the reasoning aftermarket gears won't fit the 4.88 housing? I'm running only 33s
I believe it's the offset inside the 3rd that's different to any other toy diff. Gearinstalls.com should have some info about it.
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Old 07-01-2014, 08:59 AM
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Originally Posted by MaK92-4RnR
factory 4.88s are not very strong. its typical. I ran mine with lockers and they were fine with 33s.
First I've heard of this. I plan on putting some power though mine. I'll see if it holds...
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Old 07-01-2014, 08:59 AM
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Originally Posted by Edionne13
Is that the issue because factory? I would assume the quality is there from Toyota but guess it failed. What's the reasoning aftermarket gears won't fit the 4.88 housing? I'm running only 33s
the factory 4.88 is a thinner ring gear. the aftermarket 4.88 that you would put into a 4.10 or 4.30 diff is the same thickness, I believe.
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Old 07-01-2014, 06:30 PM
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Originally Posted by JasonYota
How did yours grenade? Do you have a locker?
No locker I was just driving in town only on 33's also and searching for another 4.88 diff is insane to find
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Old 07-01-2014, 06:50 PM
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I've seen them come up for sale in the classifieds time to time. Did a bearing let go or the actual ring and pinion break teeth off?
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Old 07-01-2014, 07:22 PM
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Teeth few chipped and pinion is shot.
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