OK, I need some help here (It's about cars...)

  • Thread starter Hachiroku $B%O%A%m%/(B
  • Start date
H

Hachiroku $B%O%A%m%/(B

I understand how a clutch works, but how does a torque converter work?

My Legacy wagon needs new head gaskets (it may need new heads...when I
started it up it smoked like a biotch!)

My thought is to yank the engine leaving the trans behind. I never
separated an engine from the tranny before. This brought up a question or
two:

Can it be split, and

How does a TC work? Does it come in contact with the flywheel? I know it's
filled with fluid and it's kind of a fluid drive system, but that's all I
know.

Any enlightenment appreciated!
 
Hachiroku ???? said:
I understand how a clutch works, but how does a torque converter work?

My Legacy wagon needs new head gaskets (it may need new heads...when I
started it up it smoked like a biotch!)

My thought is to yank the engine leaving the trans behind. I never
separated an engine from the tranny before. This brought up a question or
two:

Can it be split, and

Yes, remove the bolts holding the bell housing to the block
How does a TC work? Does it come in contact with the flywheel? I know it's
filled with fluid and it's kind of a fluid drive system, but that's all I
know.

Any enlightenment appreciated!

Instead of a flywheel, a vehicle with an automatic transmission has a flex
plate. If you took the center part of the flywheel out and were left with
a ring gear - the starter engages the teeth on the outside of the ring, just
like on a flywheel.

For the TC itself, think of 2 electric fans facing each other. One is
plugged in and the other is unplugged and freewheeling. The fan that is
plugged in is the side of the TC that is attached to the engine. When you
turn on the powered fan, it moves air, which moves the blades on the
unpowered fan. You can stop the unpowered fan without disturbing the
powered fan, and when you release the unpowered fan, it starts to spin up.
In the case of the TC, the impeller in the TC moves ATF against a stationary
piece called a stator, which directs the fluid to the vane - unpowered fan.
The stator provides torque multiplication to deliver more torque to the
transmission input shaft. The torque multiplication gains back some of the
inefficiencies in the fluid coupling.

In a lockup TC, the 2 parts of the TC are locked together so that instead of
the power being transmitted through fluid in the TC, it is mechanically
transmitted with no fluid slippage.
 
Just a warning if you go this route. Make absolutely sure the engine an
transmission are fully seated before tightening the bellhousing bolts. I
there is a 1/4' gap between the two then this means the TC is not full
seated. Problem is that little splined shaft which almost always come
out when the two are separated is not fully seated inside th
transmission. If you force the gap closed all you do is break th
internal ATF pump. It can be a real bear of a job to insure that shaft i
all the way in. This will make sense to you when you pull/reinstall th
engine.
 
I understand how a clutch works, but how does a torque converter work?

My Legacy wagon needs new head gaskets (it may need new heads...when I
started it up it smoked like a biotch!)

My thought is to yank the engine leaving the trans behind. I never
separated an engine from the tranny before. This brought up a question or
two:

Can it be split, and

How does a TC work? Does it come in contact with the flywheel? I know it's
filled with fluid and it's kind of a fluid drive system, but that's all I
know.

Any enlightenment appreciated!

does it burn oil, oil return holes may be sludged shut, check oil just
after shutting off and see how long it takes to go up, I had a 350
chevy that ALL the oil went into the heads, a coathanger wire reamed
it clean.
 
johninKY said:
Just a warning if you go this route. Make absolutely sure the engine and
transmission are fully seated before tightening the bellhousing bolts. If
there is a 1/4' gap between the two then this means the TC is not fully
seated. Problem is that little splined shaft which almost always comes
out when the two are separated is not fully seated inside the
transmission. If you force the gap closed all you do is break the
internal ATF pump. It can be a real bear of a job to insure that shaft is
all the way in. This will make sense to you when you pull/reinstall the
engine.


^^^^ TRUTH !

Also, some years had a defective flexplate that was replaced with a
newer design. I don't recall which years or models but if it's apart
anyway....


Carl
 

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