Question about 1984 Porsche 911
It can be worn out shifter bushings or worn out trashed' fifth gear syncro.The syncro must be popped out of its alignment and needs replacement as well as re alignment . The syncro pops out in inside dog teeth get worn out.Maybe the 5th synchro ring retaining ring got loose? Opening up the transmission to inspect 5th is the easiest thing you can do on a transmission.--------- Remove the large nut on the R/5th operating hub to remove the 5th gear synchro,For that special tool is required,.You can get this tool from autozone or napa.The tool is to lock the input shaft.Lock up the transmission by selecting two gears at once usually 5th and one other and then remove said nut holding the guide sleeve (sometimes called the spider) on. You will need to do this to get to the synchro hub/synchro ring. Since 5th gear doesn't work you will need to lock using a combination of two other gears besides 5th or use the factory tool (or a substitute) that locks the input shaft. --------- The working procedure is as follows:--- The teeth on the inside of the slider engage the dogteeth (synchro hub) on the gear. For this to happen the synchro ring must collapse (shrink in diameter) to allow the slider to move over it. Inside the synchro ring are brake bands (under the big retaining ring holding the synchro ring onto the dogteeth) which push outward against the inside of the synchro ring keeping it from collapsing until the slider and gear/synchro hub/synchro ring are turning at the same speed. Then the brake bands release, allow the synchro ring to collapse and the slider to move over it and engage the synchro hub or dogteeth. Something may be wrong with the brake bands or the pieces that operate them - the anchor block and energizer block.--------- Also cluck this link for more details.For syncro hub pics and alignment:--- http://technoanswers.blogspot.com/2011/03/1984-porsche-911-will-not-go-in-5th.html ----------------- This should help.Thanks.Helpmech.
Posted on Mar 16, 2011
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Posted on Jan 02, 2017
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