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  #1  
Old June 2nd, 2019, 22:44
askites96 askites96 is offline
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Speedo gear and SYE issue

Hi all new to the forum currently on a few others but not getting any good replies to some things. Lurked on here for a long time and found it very useful.

On to the story, I installed a teraflex sye and could not get Speedo back seated correctly in tail housing. Every time I would turn the output shaft I could hear it skipping the plastic teeth. Finally got it to where I could feel the sensor just kind of vibrate in my hand and be silent . Decided to go for a drive and the Speedo either doesnít work or bounces erratically. Came home pulled it out and it was a little rounded on the edges of the plastic teeth but not bad I just cleaned it up with a small file.

Yesterday I had to have had that thing in and out 50 times trying all kinds of angles to get it to work and sit properly after the test drive. Could not fix it. Today I tried again for an hour or so. Finally I decided instead of trying to install the Speedo assembly as you should by lining up tooth count with the bump on t case and the clip to hold it I would just try a totally different number set. My Speedo has a 40 tooth in it and by a miracle after literally hours on end fighting if I align it wrong to match the 32-38 tooth mark the Speedo works perfectly now not chewing the gear up or anything so far.. put it back to the 39-45 and it doesnít work or bounces erratically over 45mph

So In the end my question is has anyone else had to intentionally clock their Speedo gear wrong to get it to work? Maybe this new SYE housing is machined different? Just enough to cause this? Whatís your guys input? Leave it as is or try to figure out whatís wrong...?

Iím at a loss the SYE took me 2.5 hours and the damn Speedo has taken a total of about 5 now.

Any help is appreciated
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  #2  
Old June 3rd, 2019, 10:57
Rob Mayercik's Avatar
Rob Mayercik Rob Mayercik is offline
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Re: Speedo gear and SYE issue

Incorrect machining does sound most likely. You could always reach out to Terafllex and ask them about it, but if it's working I can't imagine any good reason to disturb it unless they want it back for analysis (in which case, I'd expect them to send you a replacement).

This makes me think - I can't read the markings on my tcase or speedo sensor module any more - they're too aged after all these years. I'll have to try and find a pic to reference if I ever have to go changing speedo gears again...
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Old June 3rd, 2019, 12:21
askites96 askites96 is offline
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Re: Speedo gear and SYE issue

I will reach out to them today and post back any info I can get!!
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Old June 4th, 2019, 17:25
askites96 askites96 is offline
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Re: Speedo gear and SYE issue

Called Adams driveshaft who I ordered the kit from they are supposed to get back to me after talking to some technicians hopefully tomorrow .
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Old June 11th, 2019, 17:19
askites96 askites96 is offline
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Re: Speedo gear and SYE issue

Just to keep updated, never got a call back from Adams Driveshaft however I ran it for a week with no issues removed assembly again to swap to a different ratio gear. Teeth looked fine not chewed up al all. New gear tooth size is also off a turn like the old and running fine with no problems thus far... will keep updated
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