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Culprit to why the front diff get destroyed?

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#1 Ben-Stian


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Posted 14 April 2021 - 07:01 AM

I have read that some people that destroys front diff, may also damage the block because of this... Might even happen even with stock hp.

It seems in some cases, the ETS lock up is the culprit, but not all.

Does the gears break because of weakness, or is it because of the flex of the oem housing that make tooth backlash to big and rip off the teeth?

Does the spider/sidegear break and these bits then breaks ring/pinion?


I would like to reinforce mine, so I can launch without being afraid of destroying the engine block.

I think I will get a Quaife diff anyway so both front axles stays about the same rpm, but if I also need a billet housing and stronger ring/pinion, it starts getting expensive. BUT not as expensive as a new block... :)

My car is pretty stock as per now, but I have started collecting parts, so next step is about 800hp/600ftlb.

Thinking of upgrading the ETS with 1 more plate vs stock.

Will never launch with slicks in front, only street tires.


So what is the main culprit for front diff breaking with about 1000 hp build on street tires in the front?



Edited by Ben-Stian, 14 April 2021 - 07:08 AM.

GT-R 2009 EDM

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Camaro 1969

#2 droptopp


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Posted 14 April 2021 - 10:37 AM

Good question. May have been answered back in the day when Shep posted here. Also something the shops can answer.
Cicio Performance billet Crank 4.1 w/ CP billet pistons, Zenith R turbos, Cicio wet sump oling upgrade, flex fuel, ETS mid, down pipe, race FMIC, STM titanium axle back, ID2000s, Shep One K with drop gears, DS Axles, Volk Saga 18 10/12 (MT ET Streets), Advan GT Premium 20 R888. 1450+ hp / 1210+ tq

Old setups : more AMS motors than anyone I know - Alpha 9 w/ AMS 3.8, GTX3582R Gen II w/ AMS 4.1 billet crank, GTX3582R Gen II w/ AMS 4.0 big bore billet crank and of course FBO E85.

#3 arsr35


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Posted 15 April 2021 - 10:03 AM


#4 Ben-Stian


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Posted 18 April 2021 - 08:37 AM

Seems it is the flex from the oem cast housing that causes the gears to break: https://www.gtrherit...or-the-r35-gtr/

Edited by Ben-Stian, 18 April 2021 - 08:38 AM.

GT-R 2009 EDM

Lancer Evo 2 1/4 mile [email protected]

Camaro 1969

#5 *14TrakEDN*


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Posted 18 April 2021 - 06:23 PM

How is Sheps billet front diff???
Anyone using it for circuit track?
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#6 professor matt

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Posted 20 April 2021 - 01:00 AM




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