I had a mechanic tell me it was hard on the transmission to down shift due to the "pressure buildup". Engine valve damage is a new one to me.
I would like to know also. We have group members who have transmission temperature guages and I would like to know what happens to oil temperature when going down a long grade downshifted.
Several posts have noted that 4th gear (normally overdrive) is a weak gear and won't take the long-term abuse of towing. My TV owners manual says to not tow in 4th but to go directly to 3rd which is what I do with my 3326 king.
All of my life I have used engine breaking. I find it much safer than wheel brakes as it can't fail or fade due to heat and doesn't wear out.
Bob
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