VAI bull gears

I sold the bull gears out of a vai to a guy wanting to increase road speed on his VAC. How does this work without also changing the gears driving the bull gears.
 

There are 3 optional bull gears listed and they all take their respective sidegears with teeth differences to match.

Any attempt on moving the differential center distance would move the ring away from or closer to the pinion front to back and the mesh on those cannot be altered. The mesh pattern is built into them from factory. Ant one who has ever done ring and pinion work knows what proper mesh polish patterns are on the gear tooth faces after proper shimming as dye is used to show the mesh location and compared to a book example.

He will probably be back for the side gears as well if he wants to change ratio and one tooth either way would probably not be great.
 
You are right Mel on the speed change. If a person wants to change transmission speed much you need to go closer to the input of the transmission. I wish someone would of made a Sherman style transmission for the VAC in the torque tube or triple range. That would of been the answer to the speed problem!
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top