TAC Tech > Mechanical
New gears hum
Oldsschool79:
Hello everyone, hope everyone enjoyed the holidays!
Looking for some input on rear gears. When I restored my '79, I installed 3.42 Richmond gears. I had a 2series carrier and used the spacer behind the ring gear to avoid replacing the carrier. Everything went well on setup. I have a hum on decel that goes away with accel. Now that the winter months have hit, I tore the diff. down, the pattern looks perfect, back lash just at .010. I took a reading on the pinion depth and it is dead on to the spec. engraved on the pinion at 2.251. Based on everything I see there is nothing not set properly. I have read many articles they are niosy.
Has anyone used the gears and had the same result? Thanks again
wheels78ta:
Do you have any pics of the pattern?
What are the backlash tolerances?
b_hill_86:
When I had a rear rebuilt the builder had a disclaimer that he does his best to avoid any noise but in a nutshell it happens sometimes. I have a tiny bit in mine but livable.
nUcLeArEnVoY:
Mine hums like a Blues singer on decel, too. I've just grown used to it.
Oldsschool79:
The backlash was .010
Thank you all for the replies
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