Yank Tranny Trouble.
TECH Apprentice
Joined: Nov 2001
Posts: 319
Likes: 0
From: Las Vegas
Re: Yank Tranny Trouble. </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Chris ARE 360:
<strong>My experience has been with the 4L70 and it has been less than stellar. (Needed to be totally rebuilt) It is holding up pretty well so far though.
However their converters rock! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Cheers,
Chris</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I am in the same boat as Chris.
<strong>My experience has been with the 4L70 and it has been less than stellar. (Needed to be totally rebuilt) It is holding up pretty well so far though.
However their converters rock! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Cheers,
Chris</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I am in the same boat as Chris.
Joined: Nov 2001
Posts: 34,627
Likes: 2,543
From: Schiller Park, ILL Member: #317
Re: Yank Tranny Trouble. </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by rom3:
<strong>Does this tranny still use the PCM to determine line pressure or is there a mechanical "TV" cable doing this? If the later and the cable is not adjusted/installed properly, that would cause damage quickly. Just a thought...</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">He said that it was vacuum modulated, just like my Speed Inc trany and the FLP Level IV. The line pressure is determined by vacuum and not the PCM. There is no cable.
<strong>Does this tranny still use the PCM to determine line pressure or is there a mechanical "TV" cable doing this? If the later and the cable is not adjusted/installed properly, that would cause damage quickly. Just a thought...</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">He said that it was vacuum modulated, just like my Speed Inc trany and the FLP Level IV. The line pressure is determined by vacuum and not the PCM. There is no cable.
Re: Yank Tranny Trouble. did Ed Wright raise the line pressure when he did your PCM? He often does that automatically if you don't tell him not to do it. Increased line pressure is bad for a built tranny.
Thread Starter
Teching In
Joined: May 2002
Posts: 5
Likes: 0
From: Houston, TX
Re: Yank Tranny Trouble. Yes PSJ I have a 85mm SLP descreened MAF and the car's tuned for that.
Ragtop Ed increased the line pressure, but not maximum and Mike at Yank said to tell him to put it at 100% as firm as it goes for WOT.
Ragtop Ed increased the line pressure, but not maximum and Mike at Yank said to tell him to put it at 100% as firm as it goes for WOT.
On The Tree
Joined: Nov 2001
Posts: 156
Likes: 0
From: Chicagoland
Re: Yank Tranny Trouble. Does this tranny still use the PCM to determine line pressure or is there a mechanical "TV" cable doing this? If the later and the cable is not adjusted/installed properly, that would cause damage quickly. Just a thought...
Staging Lane
Joined: Jan 2002
Posts: 64
Likes: 0
From: Brighton, Mi
Re: Yank Tranny Trouble. I was running a 4L60E in my LS1 powered 4X4 S10. I have burnt the 3rd gear clutch pack out 3 times. I use a TCI controller for the trans and run the pressure high to try and prevent slippage of the clutch. I had different people build it, and it worked great for a while after each build. My truck is heavy, 4200 pounds, and I run it hard. I am in the process of installing a 4L80E. I am tired of changing the trans every year.
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Banned
Joined: Feb 2002
Posts: 338
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From: Dallas, Texas
Re: Yank Tranny Trouble. If you are running a descreened MAF then the line pressure will be adjusted down by the computer. Why don't you get another tranny and have the car re-programmed with the stock MAF ends by Ed? With the amount of power you are running I would think that this ** could ** be your problem.