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SYN3 In Harley Davidson Transmission cause of hot oil ?

I have used syn3 in my 07 roadking from day one In the tranny,and motor.I have not had any problems at all.10.000 miles on it.shifts good.Is it that bad for tranny.
 
Your bike will be much happier with the Redline, it would like the Spectro even better... but nothing wrong with Redline. If you ride in colder weather give the redline a bit of road time at low speeds to warm up it is some thick stuff

Redline SHOCK PROOF HEAVY Rocks!
 
Well I just got back from a 1 hour ride some hill and city riding. and my temp went to 267 deg on the HD LED temp gauge and the McEwan still reads 300 degs. so I guess trans oil had nothing to do with temps being too high. but it shifts nice now.

Right. But what ARE you using in the engine? Up-grade that to a full synthetic 20W50 engine oil. See if that helps.

TQ
 
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