what causes driving through converter
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From: new hudson,mi
what causes driving through converter had my yank pt4400 stall converter installed then car dyno tuned. what causes as what my tuner said" the car drives through the converter"? Does this mean i have a bad converter? The converter is too loose? Different shift points and converter lock up speeds were changed with no effect. The car hits the limiter when the car shifts it brings down the rpms only like 100 rpm at the most and it hits the rev limiter(6900) any ideas?opinions?
thanks
thanks
Originally Posted by 98transguy
had my yank pt4400 stall converter installed then car dyno tuned. what causes as what my tuner said" the car drives through the converter"? Does this mean i have a bad converter? The converter is too loose? Different shift points and converter lock up speeds were changed with no effect. The car hits the limiter when the car shifts it brings down the rpms only like 100 rpm at the most and it hits the rev limiter(6900) any ideas?opinions?
thanks
thanks
To me that term means that your converter is too loose.
If your RPM is only dropping by 100 on WOT shifts your converter is WAY too loose or your transmission is slipping.
John
Originally Posted by JNorris
To me that term means that your converter is too loose.
If your RPM is only dropping by 100 on WOT shifts your converter is WAY too loose or your transmission is slipping.
John
If your RPM is only dropping by 100 on WOT shifts your converter is WAY too loose or your transmission is slipping.
John
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From: new hudson,mi
trans rebuild has less than 50 miles on it. my converter being too loose does that mean i have a bad converter then? sorry but i dont know much about converters.
Originally Posted by 98transguy
trans rebuild has less than 50 miles on it. my converter being too loose does that mean i have a bad converter then? sorry but i dont know much about converters.
May be too "big" for the motor, even a 3500 can put
you above 5000RPM shift extension. That Yank piece
is what I'd consider a track-only converter (though
some may choose to drive it to and from, I suppose).
Whether 4000 is enough lower, dunno. You want to
be sitting on your peak HP RPM, at the shift extension.
Thing is when you shift into the "extension" you are
up on the torque multiplication of the converter and
at or about peak torque, so these bigger converters
(with bigger STR to boot) are really going to challenge
the transmission's holding / haul-down ability. I'd have
a look at the shaft speeds under full power shifts and
be sure you like what you see (i.e. not more than 0.1-
0.3 sec of non-locked-down internal gear ratio, all slip
should be across the converter).
Rebuild is all well and good, but if you don't have the
line pressure and the friction setup to hold it, you won't.
you above 5000RPM shift extension. That Yank piece
is what I'd consider a track-only converter (though
some may choose to drive it to and from, I suppose).
Whether 4000 is enough lower, dunno. You want to
be sitting on your peak HP RPM, at the shift extension.
Thing is when you shift into the "extension" you are
up on the torque multiplication of the converter and
at or about peak torque, so these bigger converters
(with bigger STR to boot) are really going to challenge
the transmission's holding / haul-down ability. I'd have
a look at the shaft speeds under full power shifts and
be sure you like what you see (i.e. not more than 0.1-
0.3 sec of non-locked-down internal gear ratio, all slip
should be across the converter).
Rebuild is all well and good, but if you don't have the
line pressure and the friction setup to hold it, you won't.
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Originally Posted by 98transguy
trans rebuild has less than 50 miles on it. my converter being too loose does that mean i have a bad converter then? sorry but i dont know much about converters.
If you only have 50 miles on the transmission why are you going WOT?
the clutches and band can not be fully seated in as they need some kind of a break in period.
Is the converter new?
what kind of fluid are you running in the transmission?
call us at 775 826 9955 we will give you some answers
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From: new hudson,mi
the transmission was put in the car and went on the dyno. The converter has the same amount of miles on it as the converter was put in when the transmission was.
Ditch the fluid, put in a Dextron type and put some miles on the car as normal break in is about 150 miles to seat all friction parts than try again,
you will see better shifts and the converter will act correctly
you will see better shifts and the converter will act correctly
Originally Posted by 98transguy
i already have a new fuddle 400 with a 2.4 str on the way , thats what john at fuddle recomended for my mods.
