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Re: 727 OIL LOSS PLEASE HELP! [Re: Ron Silva] #659911
04/04/10 12:37 PM
04/04/10 12:37 PM
Joined: Apr 2005
Posts: 1,880
USA
Ron Silva Offline
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Ron Silva  Offline
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#2

5907006-MVC-128F.JPG (78 downloads)

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Re: 727 OIL LOSS PLEASE HELP! [Re: 440Jim] #659912
04/04/10 03:04 PM
04/04/10 03:04 PM
Joined: Jan 2003
Posts: 25,750
Rio Linda, CA
John_Kunkel Offline
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Quote:

Quote:


The FULL mark on the dipstick is 1/4" (6.3MM) above the ledge on the case that the tube inserts into.


John,
Are you referring to the top ledge shown in my attached picture (1-1/4 from pan gasket surface)?




Yes, the full mark is 1/4" above that ledge.

It's important that the VB stay submerged in fluid because there are no gaskets in the VB and when the VB is uncovered it can suck air and aerate the fluid; unlike liquid fluid, aerated fluid can compress.


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Re: 727 OIL LOSS PLEASE HELP! [Re: moparmxz] #659913
04/04/10 03:06 PM
04/04/10 03:06 PM

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Quote:

I,ve experienced the same thing, the level needs to be full or my trans shifts funky.I always just assumed when in use the level goes down from fluid pumping fast and not returning to the pan fast enough.




i have had same situation also.UNDERFILL AT CECIL COUNTY LOST .2 AND 3 MPH, ADDED A QUART AND ran my best ever.you can feel the trans. not pulling right. like a drag.but if you overfill by a 1/2 quart it pukes out the front pump vent hole. this front pump hole needs to be plugged and a top vent needs to be put in on next rebuild.

Re: 727 OIL LOSS PLEASE HELP! #659914
04/04/10 03:40 PM
04/04/10 03:40 PM
Joined: Sep 2008
Posts: 287
united kingdom
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blown360 Offline OP
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We ran it today with the oil level at the top of the pan rail and it shifted fine using the tansbrake. This new motor revs so fast though the drivers shifting late and hitting the limiter. Ran 11.98 @ 123mph today with a fluffed shift. First run was a 10.38 @ 122. We'll get it sorted!

Re: 727 OIL LOSS PLEASE HELP! [Re: Ron Silva] #659915
04/06/10 03:51 PM
04/06/10 03:51 PM
Joined: Jan 2003
Posts: 16,923
NC
440Jim Offline
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NC
Quote:

#2


That and John's words say it all, and explain my experience. I guess that super deep pan and filter extension really only adds fluid capacity (cooling?) and the same pan with a 1" extension would get basically the same benefit, since the level needs to be so high (above the valve body).

And that debunks some other posts in the past that say it is OK to run a torqueflite low on fluid. The exact mark may be debateable, but I believe in the concept; for a race trans anyway.

Re: 727 OIL LOSS PLEASE HELP! [Re: 440Jim] #659916
04/06/10 05:07 PM
04/06/10 05:07 PM
Joined: Apr 2005
Posts: 1,880
USA
Ron Silva Offline
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Ron Silva  Offline
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USA
I just talked to Dave from Pro Trans and he said that the level can NOT be run low, like 1" or near the pan rail. He said you cold run it a little low, like 1/4" just to be safe if you have a habbit of puking oil out the vents, but it needs to be near a stock/normal level. It cannot be run low despite having the deep pan and filter extension.


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Re: 727 OIL LOSS PLEASE HELP! [Re: Ron Silva] #659917
04/06/10 05:44 PM
04/06/10 05:44 PM
Joined: Nov 2003
Posts: 7,348
Mt.Vernon ,Ohio
VernMotor Offline
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Mt.Vernon ,Ohio
That is interesting for sure..I never thought about it sucking air around the valve body..

Re: 727 OIL LOSS PLEASE HELP! [Re: VernMotor] #659918
04/07/10 02:34 PM
04/07/10 02:34 PM
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Posts: 287
united kingdom
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blown360 Offline OP
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We ran it low on oil and turns out the mis-shift we thought we had due to driver error wasnt. The next run the car hit the limiter again when grabbing second and wouldnt shift into second during the burnout. Is it possible this is just due to low oil? It shifts into second when driven gently but wont under load. It shifted faultlessly before we lowered the oil level. Still ran a 10.4 with no second and short shifted to third at 133mph through the lights. Weve gotta pull the engine to fix a slight rear main leak so is it worth getting the trans checked out or should we just top the oil back up?

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