truck stalling when going into reverse
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Tuned
Joined: Sep 2007
Posts: 346
Likes: 11
From: Austin, TX
truck stalling when going into reverse
This just started happening last week. When I put the truck into reverse, the engine lugs down and dies. It' as if the AT is fully engaging reverse gear with no clutching action. If give the truck a bit of pedal, I can put her in reverse and back up without issue. Going forward into Drive has no issues. Thoughts?
Cargo Master
Joined: Dec 2005
Posts: 2,296
Likes: 11
From: freeland, mi
Speed sensor in rear diff? I had an v-10 excursion that would do this intermittently in reverse. Replaced that and never did it again. Not sure it will be the issue but it's cheap enough to try.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,704
Likes: 2,626
From: SE Florida
The problem is low pressure. Low pressure can be caused by low trans fluid, internal leaks, or a worn pump.
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,704
Likes: 2,626
From: SE Florida
Depending on how low, yes, it can damage the transmission.
If it is low enough that the filter sucks air the trans will lose line pressure. This will allow the clutches to release, and when it gets fluid again, slam back on. It is also not good for the pump to run dry, as the ATF lubes the pump.
If it is low enough that the filter sucks air the trans will lose line pressure. This will allow the clutches to release, and when it gets fluid again, slam back on. It is also not good for the pump to run dry, as the ATF lubes the pump.
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