TH400 / 4L80e Caution. W/pics
- Thread starter DaveP
- Start date
sandSStorm
One man wolfpack
Re: TH400 / 4L80e Caution. W/pics
Ka pow!
Ka pow!
midnightbluS10
Banned
Re: TH400 / 4L80e Caution. W/pics
I think those are from two seperate incidents on two different cars.
That's still pretty f'in scary.
I think those are from two seperate incidents on two different cars.
That's still pretty f'in scary.
DaveP
Active member
Re: TH400 / 4L80e Caution. W/pics
At least two different incidents. Point being I wasn't aware of this 'issue' with the 400 in high-horsepower applications. I've had 400's apart. The stock fwd clutch drum is big and heavy. And right inline with your right foot. And it's a cast steel part. I have never heard of this failure in a stock (or street) application. But something to know about when the power gets to today's racing levels. Scary.
At least two different incidents. Point being I wasn't aware of this 'issue' with the 400 in high-horsepower applications. I've had 400's apart. The stock fwd clutch drum is big and heavy. And right inline with your right foot. And it's a cast steel part. I have never heard of this failure in a stock (or street) application. But something to know about when the power gets to today's racing levels. Scary.
Ruddell
Member
Re: TH400 / 4L80e Caution. W/pics
Seeing these pictures should make some people consider a sheild thats for sure. Daaamb.
Seeing these pictures should make some people consider a sheild thats for sure. Daaamb.
DaveP
Active member
Re: TH400 / 4L80e Caution. W/pics
In all fairness, the second two pics (out of the car w/ black case) go with these pics of the shield that contained it. He said the shield did its job. Just a few small pieces came through the floor on the passenger side. Which I gathered is a characteristic of the CSR shield from my reading. It has to do with the cut-out for the cooler lines, that can be seen in the pics below.
In all fairness, the second two pics (out of the car w/ black case) go with these pics of the shield that contained it. He said the shield did its job. Just a few small pieces came through the floor on the passenger side. Which I gathered is a characteristic of the CSR shield from my reading. It has to do with the cut-out for the cooler lines, that can be seen in the pics below.
midnightbluS10
Banned
Re: TH400 / 4L80e Caution. W/pics
I read one post over there that said it went through the shield.
I read one post over there that said it went through the shield.
Jimmy, I am home and doing ok. My crew and everyone who helped load the car at the track were great. And I appreciate everything everybody did for us.
Got x-rayed and they say it isn't broke. Just swollen the the size of my thigh. I have to wear an air cast and use crutches for awhile. Gave me a perscription that could only be filled in New Jersey but nothing was open so I'm just going to suck it up.
All I know right now is that the transmission blew up, the why is what I don't know. It blew through the shield and floor then my foot. I'll go out and look at the car later.
DaveP
Active member
Re: TH400 / 4L80e Caution. W/pics
That's Kerri Beebe's car and the thread is regarding her TH400 explosion in November. Evidently the shield failed to contain her failure. It busted her foot. Those pieces on the floor mat are pieces of the shield. That long skinny thing snaking out of the hole is the intermediate clutch (case) snap-ring. I couldn't figure what that was last night.
That's Kerri Beebe's car and the thread is regarding her TH400 explosion in November. Evidently the shield failed to contain her failure. It busted her foot. Those pieces on the floor mat are pieces of the shield. That long skinny thing snaking out of the hole is the intermediate clutch (case) snap-ring. I couldn't figure what that was last night.
thunderace31
New member
midnightbluS10
Banned
Re: TH400 / 4L80e Caution. W/pics
The OP in the link Dave provided was using a shield. It went through the shield. What do you do when that happens?
The OP in the link Dave provided was using a shield. It went through the shield. What do you do when that happens?
It's just a six
Super Member
Re: TH400 / 4L80e Caution. W/pics
So ,who makes a shield for a 4l80 or 85E
Carbon fiber/kevlar construction in the previous pics?:tup:
So ,who makes a shield for a 4l80 or 85E
Carbon fiber/kevlar construction in the previous pics?:tup:
DaveP
Active member
Re: TH400 / 4L80e Caution. W/pics
I'd read through that thread that the link in the first post takes you to. It's been a week since i read it, but these are some of the points I remember. They're all in that thread.:
I'd read through that thread that the link in the first post takes you to. It's been a week since i read it, but these are some of the points I remember. They're all in that thread.:
- They talk about the CSR shield as being about the only choice available for cars with stock floor pans. The blankets need more clearance between the trans and floor.
- They also talk about coasting down in gear and NOT neutral at the end of the run.
- They mention a "clean neutral" valve body.
- I got the impression the problem (neutral coast-down) may be amplified with a trans-brake equipped valve body.
- They talk about aluminum direct drums instead of the stock cast part.
bezerk
New member
Re: TH400 / 4L80e Caution. W/pics
blame it on obama:lol:.
that really is some crazy shit, i know the tractor pulling guys use thick steel to cover the flywheel and gearbox, since they are basucly sitting on top of them. but for dragrace it would have been way to heavy.
after seeing some propshaft failures and now this, i will think about it everytime i floor it.
blame it on obama:lol:.
that really is some crazy shit, i know the tractor pulling guys use thick steel to cover the flywheel and gearbox, since they are basucly sitting on top of them. but for dragrace it would have been way to heavy.
after seeing some propshaft failures and now this, i will think about it everytime i floor it.
Re: TH400 / 4L80e Caution. W/pics
Those pieces on the floor are parts of the drum, not the shield. The shield would have been either Spectra or Kevlar laminated like a fiberglass sheet. By the way a 3/16' piece of properly laminated Specrtra will stop a 50 mm shell at 100 feet. If they wanted better protection for the driver, they would put a second shield under the floor pan. The drums have been known to break in stock application, they just don't come out of the case. They develope cracks, where the groves are machined in them, to retain the tabs on the steel plates. The little piece on the floor by the 2 drum pieces laying a V formation is a piece of the snap ring from the drum. your right about the piece coming out of the hole, it had me wondering for a while too.
Those pieces on the floor are parts of the drum, not the shield. The shield would have been either Spectra or Kevlar laminated like a fiberglass sheet. By the way a 3/16' piece of properly laminated Specrtra will stop a 50 mm shell at 100 feet. If they wanted better protection for the driver, they would put a second shield under the floor pan. The drums have been known to break in stock application, they just don't come out of the case. They develope cracks, where the groves are machined in them, to retain the tabs on the steel plates. The little piece on the floor by the 2 drum pieces laying a V formation is a piece of the snap ring from the drum. your right about the piece coming out of the hole, it had me wondering for a while too.
DaveP
Active member
Re: TH400 / 4L80e Caution. W/pics
You're absolutely right. I had figured that out too, I just didn't edit my post. There wasn't a lot of interest in this thread, so I left it alone.
I didn't know the drums broke in stock applications. But then, I'm not a trans guy by profession. I don't work on them every week. My 400 problems (both of them in 35 years of owning the car) were int sprag 'flipped' (no second), and a worn-out fwd clutch. I just have not had problems with 400s, so I don't know much about them.
I also didn't know that Spectra could be laminated. Or that it was used in those types of applications. I used to do a lot of off-shore racing sailboat stuff. I know a length of Spectra line's weight to strength ratio is pretty amazing.
Cool stuff. I learned some things. Thanks for participating.:tup:
Dave.
You're absolutely right. I had figured that out too, I just didn't edit my post. There wasn't a lot of interest in this thread, so I left it alone.
I didn't know the drums broke in stock applications. But then, I'm not a trans guy by profession. I don't work on them every week. My 400 problems (both of them in 35 years of owning the car) were int sprag 'flipped' (no second), and a worn-out fwd clutch. I just have not had problems with 400s, so I don't know much about them.
I also didn't know that Spectra could be laminated. Or that it was used in those types of applications. I used to do a lot of off-shore racing sailboat stuff. I know a length of Spectra line's weight to strength ratio is pretty amazing.
Cool stuff. I learned some things. Thanks for participating.:tup:
Dave.