High-Low Range

I just realized the transmission on this tractor i'm planning to use has a high and low range meaning I might not be able to weld it locked... Any ideas?

Don't matter. Weld the spider gears in the diff. Make sure they are clean, and lots of heat/weld.

I wouldnt attempt to open that if it works - its literally full of gears and shims .

Yeah these transmissions are quite complex, pretty much like a standard car transmission. I believe these use a different type of spider gear, judging the parts diagram. Looks like they are mounted externally to the ring gear and rotate around internal gears. Should be lockable. If you open it be careful it has to be opened on its side and on a certain side otherwise everything will fall out. I stuck a diagram up, not the same year or model as yours but they didn't change much over the years.

This is the actual diagram... help? please? Model #91725520

Only way to lock it is to go inside. If your not comfotable pulling it apart, maybe you could find someone who is?

Oh - they also use 10w30 motor oil BTW - due to the tight spaces inside, a thicker oil wouldnt 'move around' as well - i herd that from a GT tractor site when i asked what type of gear oil to use in my GT II's trans ( same thing) .

Howdy yalll
Long time builder and new to the forum.
This is a wonderful site with many good ideas.
Thank you for the opportunity to participate.

Its not the same as a locked diff but an alternative is to put Steering brakes on it.
Tire slips pull that brake!

^^^
Cutting brakes would be a good alternative for this transaxle. 1" keyed shafts are easy to find hubs for... also the housing & differential are strong enough to handle the stress.

Good idea, and welcome aboard Hillbilly Homer