Smoked a U-Joint and Trans

[buickboy]

This is info for those that do not know one of the effects of a worn or wrong u-Joint on our cars, and the transmission damage that can result:

I was launching the car at 13-15 lbs using a stageright TB. Broke the rear U-Joint on launch. Got the driveshaft fixed insuring they used solid (non-greasable u-Joints). Installed drivshaft. Put car in drive and trans would go into gear, but would not go forward, but it would go in reverse.

Pulled trans and my local trans guy and I tore it down tonight. Found that the Lo-Reverse sprag had exploded and took out all gears and components directly attached. All other parts looked good.

Conclusion:

We feel that when the u-joint let go, the driveshaft flopping around caused the sprag explosion and surrounding damage.
Pretty quick, but expensive lesson and fix.

Mitch

 

[lyonsd]

I smoked a regular joint.

 

[LV GN]

Re: Re: Smoked a U-Joint and Trans

Originally posted by lyonsd
I smoked a regular joint.

we know

 

[Hawaiian Turbo]

 

[lyonsd]

Re: Re: Re: Smoked a U-Joint and Trans

Originally posted by LV GN
we know

I was just kidding. I don't do drugs.

 

[QKRNYRS]

Re: Re: Re: Smoked a U-Joint and Trans

Originally posted by LV GN
we know

 

[chevyII]

thats to bad,Ive seen in the past where the tailshaft housing breaks from the drive shaft prying on the output shaft. Did you crush your exhaust to? Ya, it got expensive really

 

[TurboJim]

I thought the LR sprag was the weak link when using the stage wrong brake?

 

[Chuck Leeper]

Re: Re: Re: Re: Smoked a U-Joint and Trans

Originally posted by lyonsd
I was just kidding. I don't do drugs.

You must, if you are still driving that "Moosetwang"!!!

 

[wh1-Denver]

I had a stage right and it ruined my forward drum unit. I would take it out. They are crap. Cost me $700 to fix.

 

[Intercooler]

Originally posted by TurboJim
I thought the LR sprag was the weak link when using the stage wrong brake?

That is correct. As with any performance mod it puts a strain on something. Jason Cramer has been running his for years without a problem. Kind of a coin-toss!

 

[Intercooler]

Originally posted by wh1-Denver
I had a stage right and it ruined my forward drum unit. I would take it out. They are crap. Cost me $700 to fix.

As in you busted your forward drum off at the narrow interface? That happens with 13 second cars too. Just no meat there! On a brand new rebuilt trans I snapped mine just testing out the Stage-Right. I put the 4340 CK piece in to cure it. One of the weakest parts in the 200.

 

[buickboy]

Jim-

it was the L/R sprag. it was destroyed in 1/4 pieces. I got he sprag brand new from Bruce tolle's shop. it had a plastic cage.
Mitch

 

[LV GN]

all transmissions need harden and upgraded parts to live behind high hp. and tq. you cant just install a trans brake with a stock setup . then bitch about the trans failing. the stageright style brake was the best thing to ever hit the market. i been running mine for over 5 yrs and the only thing to happen is burning the 3rd gear clutch's. and i always leave with 20 to 24 lbs' of boost. where else can you a fully auto shifting trans brake for $199.00 and only 1 hr. to install

 

[Adrian87]

joint=drugs?