This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
The Forum Parts and Services Unofficial Allis Store Tractor Shows Serial Numbers History
Forum Home Forum Home > Allis Chalmers > Farm Equipment
  New Posts New Posts
  FAQ FAQ  Forum Search   Events   Register Register  Login Login


8550 transmission jumps out of reverse
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
darrel in ND View Drop Down
Orange Level
Orange Level
Avatar

Joined: 22 Nov 2009
Location: Hebron, ND
Points: 8637 		Post Options Post Options   Thanks (0) Thanks(0)   Quote darrel in ND Quote  Post ReplyReply Direct Link To This Post Topic: 8550 transmission jumps out of reverse
    Posted: 13 Apr 2024 at 5:10pm
Should be in the field instead of working on it, but like the subject line says, my 8550 won't stay in reverse. All other gears work fine. Pretty much just went from working fine to this. Just now pulled the cab floor plate off, everything looks in order as far as shifting linkage. Had it shut off, seemed to go imto reverse nicely. Started it up, as I slowly let the clutch out, just as soon as it started to move, it kicked out of gear and made a heck of a gear grinding noise. Does it pay to pull the transmission cover off, or is there quite likely something much deeper
Appreciate any help. Thanks
Darrel
Back to Top
Sponsored Links


Back to Top
8070nc View Drop Down
Orange Level Access
Orange Level Access


Joined: 21 Mar 2019
Location: North Carolina
Points: 506 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 8070nc Quote  Post ReplyReply Direct Link To This Post Posted: 13 Apr 2024 at 6:54pm
Thinking from a distance i think id put it in reverse and put a wrench or pry bar or something on the shifter and make sure the cable is pushing it all the way into reverse. You may have already done that. If it is id say its a worn fork
1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
Back to Top
Leon B MO View Drop Down
Orange Level
Orange Level


Joined: 12 Sep 2009
Location: Old Monroe, Mo
Points: 2112 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Leon B MO Quote  Post ReplyReply Direct Link To This Post Posted: 13 Apr 2024 at 7:22pm
I had a bad cable on a 7060. It ruptured in the middle. Check shift cable end to end just to be sure and be sure cable ends are securely in there brackets. If it happened "just like that", it sounds like it's not internal.
Good luck. 
Leon B MO
Uncle always said "Fill the back of the shovel and the front will take care of itself".
Back to Top
darrel in ND View Drop Down
Orange Level
Orange Level
Avatar

Joined: 22 Nov 2009
Location: Hebron, ND
Points: 8637 		Post Options Post Options   Thanks (0) Thanks(0)   Quote darrel in ND Quote  Post ReplyReply Direct Link To This Post Posted: 14 Apr 2024 at 10:21am
With the cab floor panel removed, I can see that all of the shifting is taking place properly. Right down to the fact that when pulling the tee handle back into reverse, it travels farther then it does when going into the other two gears that are on the rearward position of the tee handle. But, as I was looking down at the top of the transmission, a twenty plus year old memory came back to me, of pulling the transmission cover off of my 7580 back then. Must be old age, but I can't for 100 percent certainty that it was the same issue, but I think maybe it was, but I do remember that whatever the issue was, I was easily able to resolve it by removing the transmission cover and putting a little fix on something. So taking the transmission cover off is definitely my next step. But, if memory serves me correctly, in order to avoid some un-due heart aches, there is a particular gear that the transmission should be in before lifting the tranny cover off. Seems like being in neutral would be logical, but something lurking in my mind says 1st gear????? Could anyone shed some light on that question????
Thanks, Darrel
Back to Top
bigal121892 View Drop Down
Orange Level
Orange Level


Joined: 05 Jan 2010
Location: Nebraska
Points: 803 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bigal121892 Quote  Post ReplyReply Direct Link To This Post Posted: 14 Apr 2024 at 11:10am
It's not neutral, sticks in my mind it was fourth gear.
Back to Top
8070nc View Drop Down
Orange Level Access
Orange Level Access


Joined: 21 Mar 2019
Location: North Carolina
Points: 506 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 8070nc Quote  Post ReplyReply Direct Link To This Post Posted: 14 Apr 2024 at 12:28pm
Let us know what you figure out for future reference please sir
1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
Back to Top
darrel in ND View Drop Down
Orange Level
Orange Level
Avatar

Joined: 22 Nov 2009
Location: Hebron, ND
Points: 8637 		Post Options Post Options   Thanks (0) Thanks(0)   Quote darrel in ND Quote  Post ReplyReply Direct Link To This Post Posted: 15 Apr 2024 at 5:06am
Bump
Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 20567 		Post Options Post Options   Thanks (1) Thanks(1)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 15 Apr 2024 at 6:20am
Transmission linkage to be adjusted (centered) to reach full detent in 2nd gear and reverse. These two gears require the most stroke to reach detent. Trans in neutral for cover removal and installation.
Back to Top
darrel in ND View Drop Down
Orange Level
Orange Level
Avatar

Joined: 22 Nov 2009
Location: Hebron, ND
Points: 8637 		Post Options Post Options   Thanks (0) Thanks(0)   Quote darrel in ND Quote  Post ReplyReply Direct Link To This Post Posted: 15 Apr 2024 at 8:51am
Thank you, Dr.
Back to Top
Unit3 View Drop Down
Orange Level
Orange Level
Avatar

Joined: 17 Oct 2009
Location: NC Iowa
Points: 5539 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Unit3 Quote  Post ReplyReply Direct Link To This Post Posted: 15 Apr 2024 at 11:34am
Best of luck. 
2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C
Back to Top
darrel in ND View Drop Down
Orange Level
Orange Level
Avatar

Joined: 22 Nov 2009
Location: Hebron, ND
Points: 8637 		Post Options Post Options   Thanks (0) Thanks(0)   Quote darrel in ND Quote  Post ReplyReply Direct Link To This Post Posted: 15 Apr 2024 at 1:06pm
Originally posted by Unit3 Unit3 wrote:

Best of luck. 


Thanks
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 11.10
Copyright ©2001-2017 Web Wiz Ltd.

This page was generated in 0.078 seconds.


Help Support the
Unofficial Allis Forum