"The Beast" died.
Thread Starter
Joined: Aug 2006
Posts: 1,458
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From: Apple Valley - So Cal
"The Beast" died. This so called strong sunshell "The Beast" is the reason my trans failed. Just thought I would share as I thought it was pretty funny after I tore the tranny down. Hope to be back up and running by the weekend.
I will have to say I have never seen a beast break. And I have never seen any sunshell break quite like that. Something new. Looks like a clean break too weird. I would have to say defect in material since theres no sign of twisting or anything just a clean break. Hmm.
I am gonna save your pictures and send them to the manufacturer and see what they think about that.
I am gonna save your pictures and send them to the manufacturer and see what they think about that.
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I dont think so theres no sign in the picture of heat which you would expect if that were true and both thrust washers look good. Looks like it just broke clean to me.
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well a closer look would be good, I could see nothing it could rub at the top. I suppose it could contact the low roller support.But that would require a bearing in or under the rear planet to have failed or the one at end of case in order for it to drop that far. Seems there would still be signs of heat and that support is cast if i am thinking correctly making it a weaker metal than the beast. Though if in fact that is the case it should be obvious by looking at the support.
Looks to me more like it broke clean then the center spun inside and may have made the sharpened edge.
A simple test to see would be to drop another beast in and see if it rubs with the planets in place.
Looks to me more like it broke clean then the center spun inside and may have made the sharpened edge.
A simple test to see would be to drop another beast in and see if it rubs with the planets in place.
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Thread Starter
Joined: Aug 2006
Posts: 1,458
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From: Apple Valley - So Cal
It is a clean break. I did not see any rubbing or twisting on any of it. There are no heat marks anywhere either. I did not see any metal shavings throughout the case either. I'm no expert but I think I may have gotten a bad one. Can't win them all.
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Looks to me like it broke where it was welded. I have never seen that before. How hard did your trans shift? Do you manually downshift when driving it? What are you using for a second gear servo? Might be a couple things to look at. Vince
I guess they really did beef up the spline area. I've seen them stamped with TCI, SPX, etc. Even seen plain ones marked made in china.
I guess it's obvious they're all the same blank shell in the same shipping crate from china and brand names get stamped on later?
I've never seen one welded, except the torque drive that uses the torrington bearing.
We will send the pictures to the people we get them from , I guess they will send them on to where they get them from.
I dont know about a weld they look like they are just stamped to me but then it could be well cleaned up I guess
I dont know about a weld they look like they are just stamped to me but then it could be well cleaned up I guess
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Thread Starter
Joined: Aug 2006
Posts: 1,458
Likes: 1
From: Apple Valley - So Cal
It shifted firm. Full throttle it would kick out the back end on the 1-2, but no other gears. I never manually downshifted this trans the stall made it to where I didn't have anymore dead spots. I'm not sure what the second gear servo is, whichever performabuilt uses. Like I said. I never saw one break and I assume I just got a bad one out of the batch and just thought everyone would enjoy seeing this.
We us the fairbanks billet servo with full accumulation shifts are firm at light throttle but not hard and get progressivley firmer as throttle increases to quite agressive at WOT, We have not seen this or any beast break till now.I would guess a weak spot in the shell. I have seen planets ripped apart and input shafts broken but that is a first.
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Also if you look at the area just around the splines for the sun gear there is a section that is much thicker than the shell. The shell measures .162 at the area in which is splined or mated with the reverse input drum. This area does not show any signs of machining. Meaning if the shell was one piece of metal to start with then then all measurements should be .162 or less. I do not have the measurements with me but the area highlighted is much thicker.
Just a heads up in all of our level 4 and level 5 units we use a much nicer piece than the torque drive shell. I personally have used a few of them and never cared for them. Here is a picture of what we make in house every day. Vince
