So after some research on the old version of the rear and the new one it seems the part I am having trouble with was a common replacement which lead to the development of the new design. Considering the cost of a new rear, or to replace all the guts with the new style parts, I think I am going to try and tinker with what I have. There is a washer behind the forward gear and I beleive that by replaceing it with a slightly thicker washer I could delay the inevitable solution of full replacement. Also If I can get the collar off I'd like to grind down the studs a bit and weld a washer on the end to reprofile them. That is if the bushing and thicker washer doesnt resolve it first.
I cannot seem to find anything listed as a bushing though. Are you referring to these?
https://www.amazon.com/MTD-941-0336-Flange-Bearing/dp/B005UAXWQ4
Also what grease would I use to replace what is in the rear?
Yep,
Thems look like the animals.
First one I pulled down it was suggested I replace both and I sent the new parts back cause they were the same size & the mower clearly has a thinner flange on the drive side .
One of those Duh moments.
Just be careful there was a person doing a similar box a while back & they found the new bushes were too thick and caused the shaft to bind when bolted up.
I use tractor gearbox 00 lithium grease in all of these transaxels.
If it is good enough for a bull gear on a 10 ton field tractor it is good enough for a 1/10 ton lawn tractor.
Being thinner it flows better inside the casings and takes a lot longer to cake up.
Most of the ones I take apart, the grease is dry, so the shafts are dry & badly worn.
The thinner grease not cushion the dogs as much as the heavy grease, but if you remember to stop before you change and to take your foot off the brake as you do so the dogs have some wiggle space it should not make any difference .
Down side is it does tend to leak a little through the axels but most can live with that till they invent white grass.