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TorqueFlite 727-How Much Slippage
#917104
01/30/11 02:58 PM
01/30/11 02:58 PM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
OP
master
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OP
master
Joined: Jun 2006
Posts: 5,161
CT
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I've got a 727 and 2.94 gears. The car doesn't pull like a 440 should. I'm planning a gear swap for this year. I was playing with a speed/rpm calculator, and according to calculations my transmission is roughly 80-85 percent efficient right now. At 70 mph (verified with a GPS), im turning 3000 rpm. It's a stock, regular low stall factory converter. I understand that the torque converters can wear out so to speak over time, but this transmission also behaves oddly and runs through the gears way too quickly. (There is no time between 2nd and 3rd at part throttle) The line pressure adjustment is correct and the throttle pressure linkage is adjusted correctly.
My question is, how much slippage should there be with a stock converter? I would think only about 5-10 percent.
Last edited by GTX MATT; 01/30/11 02:59 PM.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: TorqueFlite 727-How Much Slippage
[Re: GTX MATT]
#917110
01/30/11 09:18 PM
01/30/11 09:18 PM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOc !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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Quote:
I'm trying to figure out what my slippage should be after a rebuild.
NORMAL driving .... other than WOT ... with no-load ... should be virtually NO slippage.
You have a trans that is coming-apart. 
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Re: TorqueFlite 727-How Much Slippage
[Re: GTX MATT]
#917111
01/30/11 09:30 PM
01/30/11 09:30 PM
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Joined: Jan 2003
Posts: 74,974
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
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Quote:
Quote:
so you think you have about 20% slippage ?
How is your ATF quality ?
Its turning color pretty quickly and the transmission is generating clutch material and metal like mad.
The throttle pressure linkage is all the way back at full throttle. I checked the lever on the transmission and it pulls it all the way at full throttle. I even had a friend look at it who rebuilds transmissions and used to be a certified Chrysler transmission technician and he reassured me that its set correctly.
sounds like the trans is slipping if it is generating clutch and metal , that is not normal. as far as your linkage being all the way back at full throttle that is not properly adjusted. get out your service manual and adjust it as it says in there .
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