1992 argo magnum 8x8 Transmission Question

[mike bar]

Great pics. I'll look closer tomorrow night, tired and going to bed. Thanks Roger, Mike

[mike bar]

In your opinion, what is the most important thing to watch when taking this apart? RD said he ruined a frost plug. What would happen when opening it up to make you have to do that? I know I ask a lot dumb questions but I have to prepare myself for the unknown so I don't SELF DESTRUCT when something doesn't go quite as planned. Again, Thanks for the great pics Roger.

[Roger S]

If you can download that 60 meg file I linked to, it has step by step overhaul instructions and specs.

[mike bar]

yes Mike you have the same problem, over time from going gear to gear selection the ball wears down the slide shaft on the sides of the detents, too much torque on the gear and the spring loded ball pops out of the detent, ill take a pic of a bad one tommorrow to show a bad one

What's the fix for this problem.

[reiddo1]

I have one apart on the bench right now, it had exactly the same symptoms that you describe.
I will replace all bearings and seals. I will also replace the Primary input shaft (It has the drive gears for Hight, Low, and Rev) The gear for High is perfect, the gears for low and reverse are worn (Rounded) Costs about 175 Bucks.
I will also replace the "Double Gear" which is the one that slides side to side and actually shifts you from High to Low, to Rev. Teeth are chewed a bit. Cost.......Not sure, but probably about 100 Bucks. The detents on this shaft, where the steel ball locates the gear seem to be fine.
Also replacing the "Idler Gear" which is part of the reverse Gear train. Costs about 65 Bucks. MIGHT just turn it around instead of replacing it. The teeth on the side that engages are chewed up a bit.
I had to damage one "frost plug" over the end of the shaft that carries the "Double Gear", you might want to have a spare for that. Cost 5 Bucks

Hope this helps a bit.

RD

Similar experience for me; the high low double gear was chewed up; the reverse idler was rounded off but all else was OK. Installed new reverse idler, input shaft seal and double gear and now the transmission works as new.