I bought everything off amazon and am doing a complete rebuild. My lawn mower is about 7 years old but i used to pull a heavy garden trailer and the variators in the transmission stripped out. I didn't want to spend 4 grand on a new mower. I also went to Ace hardware and replaced all my nuts and bolts with stainless. Makes it nicer. Use PTF based anti seize to prevent galvanic corrosion.
Good suggestion by saying not to tight. Those bolts cannot be tightened too much for the aftermarket spindles. I tried to get 30 lb-ft (heard from another channel). 2 out of 4 bolts (not self-tapping) snapped off. Luckily, it was not difficult to remove the left-over bolt stems. I used a screw extractor. Had to buy new bolts. The thread size appeared odd. I had to ask the vendor.
I bought the John Deere Spindle from a local Dealer. 63 Bucks. It did not come with any fasteners at all. So DO NOT discard any nuts or bolts. The 4 Bolts that hold the spindle to the mower deck are self tapping. There are no threads in the spindle housing. I spoke with the dealer about this, I was told to use a 3/8" air impact to install the self tapping bolts.
Excellent video John. I have the same D105 mower and I have to replace my spindles too. Could you give a link where you obtained them? Thank you, I have subscribed.