108 troubles
 

Hey Guys,

I can't remember if I had posted on here about my 108 rear end going out or not, so I will try to explain what happened. I was cutting grass in the yard in 1st gear and all of a sudden it felt like I had hit a stump. So I backed up and heard a nice grinding sound and then reverse stopped. I pulled it in the shed, thinking that the ring and pinion had broke. I went out today and started her up to run for a while, shut her off and put her in 2nd gear and she caught, so I tried the rest and 1st and reverse are gone, but 2nd and 3rd will still grab like they will both work. I have NEVER been into a rearend of any type vehicle before nor do I know anything about a transmission. :BlahBlah: please tell me what is wrong, does it point towards the trans or the rear end? thanks!!!! jeff

Sounds like a Transmission problem to me. If the rearend was gone, you would have NOTHING.

I would pull the shifter...the problem will likely be pretty obvious when you take a look inside.

I vote transmission. 1st and reverse are connected together on the top input shaft of the transmission side of the trans axle. I would guess that something happened to the 1st & Reverse shift fork that moves this gear combination, it probably happened when you were mowing in first and it stopped. I've seen this on the pulling track before. You can remove the shifter cover and look inside at the shifter forks and rails without causing any harm. Good luck. :beerchug:

Pull the rear cover off, and if it's like mine you may find a tooth or something else. If not you will likely find something under the shifter.

Its probably the top slider gear for first gear. They can break and fall down into the transmision and get stuck inside other gears. This usualy only happens when putting alot of stress on it from pulling something. It can be the ring giear on the carrier but if it was then it wouldnt move in any gear.

inside the tranny
 

well guys, i took the fender pan off (who would've thunk it that the bolts would be THAT hard to remove on a nearly 40 year old tractor) and the gear shifter and i didn't see anything broke, am i missing something here? and when i get this thing fixed, i think i'm gonna leave the fender pan off and fab up some floor boards and something for the seat to "sit" on because it looks fabulous with out them. jeff

I know you are missing a question that pertains to the funtionality of the shifting of the tranny????

Its true they look better with out the fenders! I agree with you there.:D If you do do it, Id like to see what you come up with because I was kinda thinking the same thing when I took mine off, lol.

What is the tranny doing?

Ok dm17 what did I forget? And Larry, go read my other post "108 troubles". I would tell you but im writing this with my phone since I cant log in on the computer. Jeff

Jeff I merged your two threads so the same info can be seen.

Thank you sir!!!

Ahhh,
Now I know whats going on.Thanks Duke.

Your both welcome!:beer2:

ok DM 17, what am i missing? i was serious when i said i've never been in the trans before. nothing inside looks broke, just the normal wear of a 39 year old tractor. thanks, jeff

Sound like you are missing some teeth...:biggrin2:

You will be able to see what's going on in there by turning the drive shaft by hand after disengaging the clutch pedal.Put the rear up on jack stands and then as you as looking from the rear,the right side shifter fork controls 1st and reverse.Using a wooden dowel push it forward,that is rev.turn the drive shaft and see as the gears move if there are any missing teeth on the 1st and rev sliding gear.Then push it back to neutral then back to first.Again turn the drive shaft and look for missing teeth on the rev idler.It is hard to see in there but you should be able to pinpoint the problem.The repair manual helps a lot to have when doing trans work.Go to the parts look up on the cub cadet site and it shows an exploded view of the gears .

ok, dm 17, i got a good one for you. i did as you said to do. i slid the right side up and back and spun the drive shaft and the back tires looking for missing teeth, none were missing. i slid the left side up and back and looked for missing teeth, none were missing. i don't understand it. if you put it in 2nd or 3rd and try to push it, it catches and won't roll, but if you put it in 1st or rev. it will roll. i don't think it would be in the gear reduction, because if it were then i wouldn't have a 2 or 3, right? :bash2::bash2: what now? i wonder if it's the JD gremlins? thanks, jeff

there are no teeth missing, but looking at the cross section picture i got out of the manual, there looks to be a "gear" missing on the trans mainshaft. you can see where i am pointing the screwdriver tip to. but i do have a gear on the left side (looking at it from the rear). thanks jeff

tranny gremlins
 

i went out tonight messing with the tranny in the 108 AND now i have first gear but not R. :bigthink: i have done NOTHING to it. so i think fairies (or is it elves??) are giving me a helping hand. the only thing i done was slide the "slide" back and then forward and presto, 1st gear!!!! i'm gonna give it a few days then go slide it again and see if my R is gonna work. jeff

Shift fork?

vince, go check out my other post "108 troubles", right now it's on the third page and i have some pics posted of the inside, from the top and see what you think. thanks, jeff

Jeff I merged your two threads so the same info can be seen.