Original transmission "KNOCK"
 

Hello OCC Group,
My CCO has a transmission noise.
It is not really that bad but wanted to know if the thumping noise is normal or am I due for rebuild. Most noticabally in 1st and reverse.

Also my CC 70 has the same noise but just in 2nd gear.
Thump Thump Thump.... :Help:

I would take the shifter off and see if any of the gears are missing a tooth.

Thank you for the reply Matt!
OK I will pull the shifter tomorrow.
If I do not find a bad gear, could it be a bad bearing?
Is there a ring gear like in a car rearend?
Is it possible that the mower sat with moisture"Water" in the trans and rusted a spot on the gear?

Ahh,
Thumping noise,More than likely and more likely, your first and reverse idler gear is missing some teeth.Or you are missing a tooth on the first and reverse gears...or both.

Well that just stinks!!!
OK Darkminion, I will let you guys know what I find.....

Hello Group,
I have not pulled the rear end cover or the shifter to see what is making the noise yet but thought since I was going into town tomorrow I would get replacement oil-fluid for the rear axle so it would be on-hand for when I do.
What gear oil should I buy for the rear axle of my original CC?
Thanks in advance for your reply.
Oh. Is the rear axle cover gasket available at CC dealer?

Hytran. The rear cover gasket can be obtained from CC or from a CaseIH dealer, same for the the Hytran. You can also get Hytran from a Case construction equipment dealer, too.