What are the weak links in the drivetrain?

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Re: What are the weak links in the drivetrain?

Postby MrDB » Wed Feb 15, 2012 12:19 pm

Is it diff or casing? ive seen loads of broken casing. Usually down to worn diff mounts allowing unwanted movement.

Solid diff mount on rear also causes cracking if the rest of the mounts arnt solid also..
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Re: What are the weak links in the drivetrain?

Postby sleeper » Wed Feb 15, 2012 4:16 pm

MrDB wrote:Is it diff or casing? ive seen loads of broken casing. Usually down to worn diff mounts allowing unwanted movement.

Solid diff mount on rear also causes cracking if the rest of the mounts arnt solid also..



It`s the thorsen unit itself that cracks and locks up.
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Re: What are the weak links in the drivetrain?

Postby tubasteve » Wed Feb 15, 2012 4:25 pm

sleeper wrote:
MrDB wrote:Is it diff or casing? ive seen loads of broken casing. Usually down to worn diff mounts allowing unwanted movement.

Solid diff mount on rear also causes cracking if the rest of the mounts arnt solid also..



It`s the thorsen unit itself that cracks and locks up.



Because of the clutches providing extra heat? I would say most weakest link you won't have to worry about, unlike block cracking....

Understand you see allot more "I cracked my block" and very few, "I need a diff

I maybe wrong
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Re: What are the weak links in the drivetrain?

Postby sleeper » Wed Feb 15, 2012 5:23 pm

There is no clutches in the stock rear diff.. a thorsen unit is built in a completely different way.
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Re: What are the weak links in the drivetrain?

Postby l0ch0w » Wed Feb 15, 2012 5:43 pm

Hold on now? The torsen rear ends break, but what about the stock open diff? Is a cusco LSD the only way to go if you want over 500whp? Welding the diff would eat tires like crazy and im not a big fan of that...
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Re: What are the weak links in the drivetrain?

Postby sleeper » Wed Feb 15, 2012 8:05 pm

l0ch0w wrote:Hold on now? The torsen rear ends break, but what about the stock open diff? Is a cusco LSD the only way to go if you want over 500whp? Welding the diff would eat tires like crazy and im not a big fan of that...



Yupp, the rear diff brakes.
The open ones does not, the stock 165 rear diff is actually have stronger gear than a 185\205 diff since it does not have to have room for a thorsen unit.. ( thicker gear.) So welding that would give you the strongest "stock" diff you can have.

It will eat a little more tyre, but you can buy alot of tyres for 1600usd..
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Re: What are the weak links in the drivetrain?

Postby klue » Wed Feb 15, 2012 11:00 pm

Has anyone used the Cusco diff? I can order them in but its $1800 bucks!
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Re: What are the weak links in the drivetrain?

Postby dragstang86 » Wed Feb 15, 2012 11:06 pm

What are most of the higher power guys on this board running for rear diff? Guys like tjdouble07 or Pat? anybody know?
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Re: What are the weak links in the drivetrain?

Postby tubasteve » Thu Feb 16, 2012 12:51 am

sleeper wrote:There is no clutches in the stock rear diff.. a thorsen unit is built in a completely different way.



I'm sorry your right...I was confused about the other posts I was reading.
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Re: What are the weak links in the drivetrain?

Postby l0ch0w » Sat Feb 18, 2012 3:58 pm

Wouldnt welding the rear diff potentially cause uneven tire wear, thus causing VC failures?
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Re: What are the weak links in the drivetrain?

Postby tubasteve » Sat Feb 18, 2012 5:22 pm

Well, if you have welded your diff, it better be a track only car.
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Re: What are the weak links in the drivetrain?

Postby sleeper » Sat Feb 18, 2012 6:24 pm

tubasteve wrote:Well, if you have welded your diff, it better be a track only car.



Why??
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Re: What are the weak links in the drivetrain?

Postby klue » Sat Feb 18, 2012 8:28 pm

sleeper wrote:
tubasteve wrote:Well, if you have welded your diff, it better be a track only car.



Why??



you will have no differential action, meaning no allowable difference in wheel speed, meaning if you take a low speed turn your inside wheel will not be allowed to go slower, so you drift :P
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Re: What are the weak links in the drivetrain?

Postby sleeper » Sat Feb 18, 2012 9:12 pm

klue wrote:
sleeper wrote:
tubasteve wrote:Well, if you have welded your diff, it better be a track only car.



Why??



you will have no differential action, meaning no allowable difference in wheel speed, meaning if you take a low speed turn your inside wheel will not be allowed to go slower, so you drift :P



Well, i know this ( since i am running a st165 with a welded center and rear diff..

And from what i feel, the positives are far better than the negatives.. the only problems you will have is that the car will eat some tyres if doing tight parking.. and it will be almost impossible to push the car when turning..

Positives: Better controll under hard driving, the rear diff won`t explode from hard launches,

I guess it all depends on what you are using your car for, if it`S a near stock car you use as a daily ride, i guess it`s not a good idea.. but if you plan on doing some 1/4 mile racing or it`s a high hp car and you don`T want to use 1600++usd for a cusco unit... this is really not as bad as some people think!
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Re: What are the weak links in the drivetrain?

Postby l0ch0w » Sat Feb 18, 2012 10:29 pm

nobody mentioned my post about how uneven tire wear between the front and back will likely cause Viscous Coupling failures.. hell, not replacing all 4 tires at the same time can cause VC failures, wouldnt this also?
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