Broken trans case on the dyno today...***PICS***

[BAGN]

Hey yullose,

Did it happen on accell or deceleration? I had a custome's truck throw his driveshaft on my dyno last week. It looked very similar to the pictured driveshaft above. Broke the case and made a big mess as well. (If i'd been a foot closer & i'd be sending you this from the ER!) just curious, Chris

 

[yullose]

The driveshaft pic shows it on the floor, but is pointed the wrong way. The unseen U-joint stayed in the pinion yoke with a foot of remaining driveshaft.
If I spun the driveshaft the other way, it would be positioned the way it was in the car. The RH end of the driveshaft was connected to the slip yoke in the trans...

Jim told me he was just starting to roll off the throttle when it broke...

This pic should help clarify what I'm trying to say...

 

[yullose]

Hey yullose,

(If i'd been a foot closer & i'd be sending you this from the ER!)

I was close enough, standing at the front door running the dyno. The bearing caps from the front U-joint hit my boots.

 

[1NASTY69Z]

Not sure when I will have time to take it out.Maybe this weekend. Will try and have some more pics up when its taken apart.

 

[Turbo1dr]

Here are my aftermarket driveshaft links.

www.markwilliams.com ( carbon for $800 )
www.dennysdriveshaft.com
www.dynotechengineering.com
www.iedls.com
www.pstds.com
www.acpt.com

Turbo1dr, what did your carbon cost you?

$1050 with the slip yoke and the pinion yoke with 1350 joints. (shipping included in that price)

 

[Alky V6]

I agree with Chris. The driveshaft went first. The shock that travels through the trans is tremendous. I have had friends that busted a driveshaft, replaced it and noticed trans problems afterwards. One instance turned out to be the high clutch drum support snapped clean at the base of the sealing ring tower. That is not a common failure of the trans. I've seen a TF 727 output shaft bent at a 90 degree angle after a driveshaft failure. That is one hell of a thick shaft.

I'm amazed that more people running the stock driveshaft aren't having this problem. When you start studying specifications for natural frequencies of various driveshaft types and dimensions, it will scare the hell out of you. Anyone that races his Buick should look into upgrading his driveshaft and U-joints.

 

[TTOP350]

I know Trans failures suck. This is a 700R4 out of my 89 Formula.
the rest of the drivetain was fine....but it tore through the floor bad.
check out my last trans mod.. I was doing a small burnout when it happened LOL

http://www.team3rdgen.com/modules.p...ame=gallery&file=index&include=view_photo.php

 

[Alky V6]

That is nasty.

 

[Brer Rabbit]

Sorry about the break but Thanx.

I now know for sure that I have another 500 to 600 more to spend for a good drive shaft. It never ends with these cars. "Just when I thought I was out..I was pulled right back in". Thank God for income tax returns.

 

[Brer Rabbit]

That pst chrome moly shaft has my name on it.

anybody using that one?

 

[GNVYUS 1]

FYI, Mark Williams MMC 3.5 aluminum with 1350 spicers and you sending in your yoke to get balanced was $950. This shaft is super close to the carbons in strength and weight ( carbon was $200 more with the add ons above ). I am going this route come spring time.

TTOP350, that does not even seem possible, damn.

 

[TTOP350]

I think im going to use a trans blanket next time !!!!!