5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Fourth Gear in the T-5

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Old 06-12-2011, 11:06 PM
  #1  
lsccolt
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Default Fourth Gear in the T-5

I have been driving my dad's original owner 1990 LX 5.0 5 speed. We have been having issues with fourth gear. The car has resided in the garage for ten years and we just got it registered for my last day of high school. At first the tranny shifted fine but now it grinds and is hard to get into fourth gear every time, unless I get the rpm WAY down, then it goes in smoothly, also down shifting into fourth is extremely hard and grinds a ton. I have been driving without fourth, but what is causing this?
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Old 06-13-2011, 10:45 AM
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AdderMk2
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without taking the transmission apart, anything would be mere speculation.

But i'd be willing to bet its a blocker ring issue. 4th gear is the easiest gear to work on, since its the gear that ties the input shaft to the output shaft directly.
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Old 06-14-2011, 05:19 PM
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nitrous_bob
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most likely worn syncros
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Old 06-14-2011, 07:20 PM
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Bubba 95SN
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Remove from vehicle and disassemble transmission. Suspect parts to closely inspect would be blocking ring, clutch sleeve, and 4th gear.
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