Re: Shift point adjustment and other things
Reply #10 –
Oshkosh shipped me the first three hundred cat ORED and it would upshift at the same rpms as the 250hp ones.
Faster if you manually upshifted the coach. Wrong.
Sent the coach to Allison Bob ware at S&J Chevy in Cerritos, ca to raise the upshift points and to set the modulator so at part throttle it would short shift more.
Weeks later I get a call from Indianapolis, Indiana from Allison.
The voice on the phone says "I am not calling you. But why do I have a bill here for warranty adjustments from S&J?"
I explained that the shift points were wrong as was the modulator adjustment.
He said they set them the same as the 250's.
I said that's great but the 300's had 10% more rpms.
Got quiet on the phone. He said Cat at the meetings had not told them that.
He laughed that the local sales manager had had to fix a big companies brand new product.
Said they would raise and adjust.
Next coaches were raised.
The next coaches after that had the shift points raised to 2800. And would hang in gear.
They went overboard. Oh well. Allison Bob fixed them all for me.
Had to reshim play out of the front axle and add additives and thicker rear axle oil to stop the slight gear howl under a load the stock rear axle had.
Truck housing. Not polished gear teeth. At 40k miles you could pull the third member and on a bench reset the gears to eliminate the noise without the special oils.
Quiet coach that shifted correctly without a steering wheel shimmy sold for more money profit wise and had happier owners
Topic: Shift point adjustment and other things