Turbo 400 case strength
#1
Supreme Member
Thread Starter
iTrader: (2)
Join Date: Dec 2006
Location: Hou. TX
Posts: 5,538
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Turbo 400 case strength
Well, i was cleaning out the garage after a 6.0 swap into my old 95 Z28 and when i went to move a spare engine hoist, the leg dropped down and smacked the bell housing of my TH400 TCI trans, my heart broke with the case:
I immediately called a neighbor that works as as welder and prayed he could help, so he did as he could and i am a happy camper, i was going to be PISSSSSSSSEEEEDDDDD if i had to shell out cash to swap cases:
I immediately called a neighbor that works as as welder and prayed he could help, so he did as he could and i am a happy camper, i was going to be PISSSSSSSSEEEEDDDDD if i had to shell out cash to swap cases:
#3
Supreme Member
Thread Starter
iTrader: (2)
Join Date: Dec 2006
Location: Hou. TX
Posts: 5,538
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Turbo 400 case strength
Hell yea, i have installed one in a TH350 before, those things are stout pieces and would have been the way to go if i wasnt broke from all the other parts i bought and a fire suit.
Just glad it was fixable, also not the sweet Ebay braided line dip stick for 20$, LOL, that and 2 LS1 engine dip sticks were 100-120 shipped, just some of the small stuff that broke the bank, LOL.
Just glad it was fixable, also not the sweet Ebay braided line dip stick for 20$, LOL, that and 2 LS1 engine dip sticks were 100-120 shipped, just some of the small stuff that broke the bank, LOL.
#5
Supreme Member
Thread Starter
iTrader: (2)
Join Date: Dec 2006
Location: Hou. TX
Posts: 5,538
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Turbo 400 case strength
Yea, probably going to run a shield when the turbo goes on if i dont get a new housing.
#7
Supreme Member
Thread Starter
iTrader: (2)
Join Date: Dec 2006
Location: Hou. TX
Posts: 5,538
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Turbo 400 case strength
Yea, the shields are pretty cheep, so i will be getting one when it is time to start throwing more at the engine than it is supposed to handle, probably wouldnt hurt to get one on the 89 right now.
Trending Topics
#8
Supreme Member
iTrader: (5)
Re: Turbo 400 case strength
if you're on yellow bullet search for my buddy "polish bull", he had a LARGE chunk come through the floor of his car and through the dash and stop where the HVAC should have been. Through the carpet as well His drum let loose at 7000+ rpm at the stripe
#9
Moderator
Join Date: Jul 1999
Location: 51°N 114°W, 3500'
Posts: 17,167
Likes: 0
Received 136 Likes
on
114 Posts
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Turbo 400 case strength
I still run a stock case Powerglide. I use a CSR one piece tranny/flexplate shield. It's a little more costly but fits tight against the case so it fits under the floor easier.
The shields just slow the the exploding parts down. They won't always stop the parts from getting into the car. I saw a dodge 727 tranny explode on the starting line a few years ago.
Clutch hub exploded. Went through the tranny case, kevlar shield, floor, then bounced off the passenger side door bar, through the door which exploded the window and sailed about 300' over the grandstand into a windshield. No injuries but what a mess.
This is the damage it caused.
http://www.turbodieselregister.com/f...explosion.html
The shields just slow the the exploding parts down. They won't always stop the parts from getting into the car. I saw a dodge 727 tranny explode on the starting line a few years ago.
Clutch hub exploded. Went through the tranny case, kevlar shield, floor, then bounced off the passenger side door bar, through the door which exploded the window and sailed about 300' over the grandstand into a windshield. No injuries but what a mess.
This is the damage it caused.
http://www.turbodieselregister.com/f...explosion.html
#10
Supreme Member
Thread Starter
iTrader: (2)
Join Date: Dec 2006
Location: Hou. TX
Posts: 5,538
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Turbo 400 case strength
Holy crap, that is seriously massive failure, glad no one was hurt or killed, that is just crazy.
#12
Supreme Member
Thread Starter
iTrader: (2)
Join Date: Dec 2006
Location: Hou. TX
Posts: 5,538
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Turbo 400 case strength
I really didnt want to say it, guess someone was going to, lol.
#13
Supreme Member
Join Date: Apr 2002
Location: Southwest Florida
Posts: 4,627
Likes: 0
Received 2 Likes
on
2 Posts
Car: projects.......
Re: Turbo 400 case strength
The bellhousing area is a comon "weak point" but it will do it's job just fine. Added stress(such as chassis flex, or mount flex, or dropping cherry picker legs...) has been known to break them.
We've pushed over 1500hp through the stock 400 case, will soon be pushing even more. Up until this month, there were no other options for 400's; full stock of stock w/ ultra-bell(only works well on 8-bolt pump/cases, not the more comon 6-bolt). JW is releaseing a new ultra case this month, designed specifically to work with their ultra-bell, and eliminating many of the stock weaknesses/issues.
We've pushed over 1500hp through the stock 400 case, will soon be pushing even more. Up until this month, there were no other options for 400's; full stock of stock w/ ultra-bell(only works well on 8-bolt pump/cases, not the more comon 6-bolt). JW is releaseing a new ultra case this month, designed specifically to work with their ultra-bell, and eliminating many of the stock weaknesses/issues.
#14
Re: Turbo 400 case strength
I still run a stock case Powerglide. I use a CSR one piece tranny/flexplate shield. It's a little more costly but fits tight against the case so it fits under the floor easier.
The shields just slow the the exploding parts down. They won't always stop the parts from getting into the car. I saw a dodge 727 tranny explode on the starting line a few years ago.
Clutch hub exploded. Went through the tranny case, kevlar shield, floor, then bounced off the passenger side door bar, through the door which exploded the window and sailed about 300' over the grandstand into a windshield. No injuries but what a mess.
This is the damage it caused.
http://www.turbodieselregister.com/f...explosion.html
The shields just slow the the exploding parts down. They won't always stop the parts from getting into the car. I saw a dodge 727 tranny explode on the starting line a few years ago.
Clutch hub exploded. Went through the tranny case, kevlar shield, floor, then bounced off the passenger side door bar, through the door which exploded the window and sailed about 300' over the grandstand into a windshield. No injuries but what a mess.
This is the damage it caused.
http://www.turbodieselregister.com/f...explosion.html
#15
Senior Member
iTrader: (2)
Join Date: Jul 2002
Location: Philly, PA
Posts: 784
Likes: 0
Received 1 Like
on
1 Post
Car: 1986 Camaro SC
Engine: None
Transmission: None
Axle/Gears: Moser 9" W/ spool 3.50 gears
Re: Turbo 400 case strength
Funny, some people go 1000 passes on the 400 case and some blow bells after 4. Guess it just depends on the life of the case. The Ultra bell is a really nice investment for a T-400. As stated the Ultra bell really should use the 8 bolt case that it was designed for. That case is harder to come by these days.
#16
Supreme Member
Join Date: Apr 2002
Location: Southwest Florida
Posts: 4,627
Likes: 0
Received 2 Likes
on
2 Posts
Car: projects.......
Re: Turbo 400 case strength
Almost all broken bell housings are due to improper mounting and/or chassis flex being transfered into the case.
Assuming the driver still has his legs as it sounds, then yes all the safety stuff was worth it.
Something very odd happened for the drum to come out as a whole like that. What the shields are for is to slow/stop the shrapnel when a drum explodes into pieces from over-speeding. - I'm glad I've never needed mine, but walking is worth far more to me than the safety stuff costs.
Something very odd happened for the drum to come out as a whole like that. What the shields are for is to slow/stop the shrapnel when a drum explodes into pieces from over-speeding. - I'm glad I've never needed mine, but walking is worth far more to me than the safety stuff costs.
#17
Moderator
Join Date: Jul 1999
Location: 51°N 114°W, 3500'
Posts: 17,167
Likes: 0
Received 136 Likes
on
114 Posts
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Turbo 400 case strength
Since I redid my front and rear motor plates this winter, I've eliminated my transmission mount. The powerglide isn't that big or heavy. It's now just held on by the 6 bellhousing bolts. Any chassis flex won't affect the bellhousing. A TH400 would still need some support at the rear since it's a long and heavy transmission.
#18
Re: Turbo 400 case strength
Assuming the driver still has his legs as it sounds, then yes all the safety stuff was worth it.
Now is that ultra-rare to have something get through the shield like that? I agree, having working legs is priceless, but its a mute point if the "protection" doesnt work.
#20
Supreme Member
Join Date: Apr 2002
Location: Southwest Florida
Posts: 4,627
Likes: 0
Received 2 Likes
on
2 Posts
Car: projects.......
Re: Turbo 400 case strength
Very rare for a large peice like that to come out; there's a chain of events or something surrounding that that we don't know. - It takes much more than just a drum failure for the complete assembly to get loose like that.
The shields are ment to slow/contain drum explosions, often caused by "neutraling" the trans. When a drum is "hyper-sped"(like when neutralled) it simply self-destructs due to being spun beyond it's "critical speed"(faster than the material can withstand per tha available balance). When this happens, fragments and pieces start scattering and the shields do a great job of making sure you still have legs when all is said and done.
The shields are ment to slow/contain drum explosions, often caused by "neutraling" the trans. When a drum is "hyper-sped"(like when neutralled) it simply self-destructs due to being spun beyond it's "critical speed"(faster than the material can withstand per tha available balance). When this happens, fragments and pieces start scattering and the shields do a great job of making sure you still have legs when all is said and done.
#22
Supreme Member
iTrader: (5)
Re: Turbo 400 case strength
now who wants to help me get this TCI drum shield to fit over my trans? Here's to hoping I have enough space in the floor to clear it. Only choice I have since I run the ultra bell and a trans blanket will cook the trans in street driving due to no air flow
#23
Re: Turbo 400 case strength
whew, trans blanket just about whooped me...but it's on! freshly wrapped headers are painted and drying, bout to put them back on and get the exhaust back on the car. if i wasn't wrapping/painting the headers/exhaust then i'd have probably had this job done in about 2 hours, but that's just not the case, lol.
#24
Supreme Member
Thread Starter
iTrader: (2)
Join Date: Dec 2006
Location: Hou. TX
Posts: 5,538
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Turbo 400 case strength
I just got done finishing the long block and i think, if i get the funds, i will try to get a shield before the car is running, but i doubt i will have the cash before then. With a turbo going on, i would really like to have one now, but i know i will be removing the converter when the turbo goes on because i will need a better converter with the anti ballooning plate and one that will handle the power.
Still need to install the new aerocatch pins, braided steel dipstick and 50 cc acc pump on the 89, damn 86 has me side tracked, LOL. Oh yea, adjustable LCAs need to go on the 89 too....
Still need to install the new aerocatch pins, braided steel dipstick and 50 cc acc pump on the 89, damn 86 has me side tracked, LOL. Oh yea, adjustable LCAs need to go on the 89 too....
#25
Supreme Member
Join Date: Apr 2002
Location: Southwest Florida
Posts: 4,627
Likes: 0
Received 2 Likes
on
2 Posts
Car: projects.......
Re: Turbo 400 case strength
Like I told Matt, if heat becomes an issue with the blanket, two smal pieces of flat strap bent to go around the top from pan rail to pan rail can be made to hold the blanket 1/2" or so off the case. - In reality though, the case is a far less effective cooler than the trans cooler. If you have heat issues due to the blanket then your cooler was already maxxed out; upgrade and you're good to go.
#27
Re: Turbo 400 case strength
I need to install a bung in the back of the pan, not on the bottom. I hope the cooler is good enough. After a good drive i took a laser heat gun and read the surface temps of the cooler and it wasnt that hot. I was surprised. I think it was only hot because the radiator was up to 200 deg. I think my rad is heating my tranny cooler...
#29
Re: Turbo 400 case strength
yeah i may move mine more forward or attach it to the back of the intercooler as there it will see more airflow but i dont want it heating the intercooler. I got a lot of room between the rad and intercooler, so i can put the cooler anywhere.
#30
Supreme Member
Join Date: Apr 2002
Location: Southwest Florida
Posts: 4,627
Likes: 0
Received 2 Likes
on
2 Posts
Car: projects.......
Re: Turbo 400 case strength
Not any real street driving with mine anymore, but even with the blown combo the most I've seen was 180*, and that was when we hurt some high-gear clutches. It usually runs around 165-170, even when I'm playing the the brake and stalling up on it a bunch. That's with a 12x10 plate/fin cooler mounted on the passengers' floorboard with an 8" fan pulling through it underneath the car.
#32
Supreme Member
Thread Starter
iTrader: (2)
Join Date: Dec 2006
Location: Hou. TX
Posts: 5,538
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Turbo 400 case strength
And here i was wondering if my trans cooler was enough, it is slightly smaller than that one i think.
Thread
Thread Starter
Forum
Replies
Last Post
Hotrodboba400
Firebirds for Sale
3
12-10-2019 07:07 PM
84 TA NV
Firebirds for Sale
1
09-06-2015 08:02 PM