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-   -   TH200 issue (https://classracer.com/classforum/showthread.php?t=52593)

Chad Rhodes 04-13-2014 03:20 PM
Re: TH200 issue
 
Quote:
Originally Posted by Alan Roehrich (Post 427660)
A stator shaft problem should show up on a data logger in a very obvious manner. The starting line RPM should be substantially lower, at least 2000 RPM lower than a previous "good pass". When the stator shaft spins, the converter will not flash, and it will not multiply torque.

With clutches, or the "sprag", RPM should be slightly higher, but driveshaft RPM should be lower.
The Converter flash seemed a little high as well now that I look at the data, it also ran within .3 mph of what it had all day. I'll have it out this week

jim powers 04-13-2014 05:56 PM
Re: TH200 issue
 
i agree with Billy, broken stator support, did the same thing back in 09 with my 305 k/sa camaro

Gary Parker 04-13-2014 07:16 PM
Re: TH200 issue
 
I have broken 2 stator supports. some are now changing them with a heavier one I believe adapting a turbo 350 one... that's what it sounds like to me

Mark Yacavone 04-13-2014 08:14 PM
Re: TH200 issue
 
Quote:
Originally Posted by Alan Roehrich (Post 427654)
Billy, that should stop the converter from reaching full stall speed or flash stall speed. Normally. It's a common problem with big engines, but I don't see it too often with small blocks, especially in Stock.
As stated, it won't stall up with stator free wheeling..It'll just act like a stock converter almost.
The low sprag is the weak spot alright.
You need to find out if the lo/rev clutches are on or off with your valve body.
If off ,and just the forward clutch on, I'm going with the sprag slipping..
Probably find broken springs and distortion on some kind...

Chad Rhodes 04-13-2014 08:23 PM
Re: TH200 issue
 
Quote:
Originally Posted by Mark Yacavone (Post 427710)
As stated, it won't stall up with stator free wheeling..It'll just act like a stock converter almost.
The low sprag is the weak spot alright.
You need to find out if the lo/rev clutches are on or off with your valve body.
If off ,and just the forward clutch on, I'm going with the sprag slipping..
Probably find broken springs and distortion on some kind...
It's a turbo action e shift if anyone knows the answer before I call tomorrow.

Dean Feiock 04-13-2014 08:34 PM
Re: TH200 issue
 
If you have engine breaking in 1st gear, then the clutches are on.

HandOverFist 04-13-2014 08:40 PM
Re: TH200 issue
 
Quote:
Originally Posted by Billy Nees (Post 427653)
Broken stator support.
Happened to our 200 yesterday at Bowling Green...

http://i434.photobucket.com/albums/q...ps518c2658.jpg

http://i434.photobucket.com/albums/q...ps4c435a8b.jpg

Chad Rhodes 04-13-2014 08:42 PM
Re: TH200 issue
 
Quote:
Originally Posted by Dean Feiock (Post 427716)
If you have engine breaking in 1st gear, then the clutches are on.
No engine braking in first.

If the stator support broke would it damage the converter ?

HandOverFist 04-13-2014 08:46 PM
Re: TH200 issue
 
Quote:
Originally Posted by Chad Rhodes (Post 427721)
No engine braking in first.

If the stator support broke would it damage the converter ?
I don't know that answer either. Just to be safe I'm going to let ATI cut it open for a look on ours.

Dean Feiock 04-13-2014 08:50 PM
Re: TH200 issue
 
Quote:
Originally Posted by Chad Rhodes (Post 427721)
No engine braking in first.

If the stator support broke would it damage the converter ?
Then your clutches are not on. Very few use the clutches as they are faster without the clutches on.

Even if the converter doesn't get damaged, it will be full of debris. Needs to come apart either way.


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