IH PARTS AMERICA
Click Here!

Go Back   IH PARTS AMERICA > Tech Forums > Transmission Tech
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read Photo Gallery IH Store Home

Reply
 
Thread Tools Display Modes
Old 03-20-2014, 06:20 PM   #1
eightOsix
Member
 
eightOsix's Avatar
 
Join Date: Aug 2009
Member Number: 1225
Location: Fraser, CO, at 9000 feet
Posts: 62
Default T-18 slips out of 4th gear

I recently had my transmission out for repair of the front bearing retainer. I replaced the clutch as well as the throwout bearing and the pilot. The flywheel was resurfaced.

Now the transmission slips out of 4th gear when coasting. I don't remember it doing this before the job, at least not as consistently.

What could be the cause?
Thanks in advance.
__________________
Greg Foley
Fraser, CO

1966 Scout 800 "Black Dog"-152, Holley 1904, Pertronix,T18, D20, Dana 44/4:88 rear, Dana 27/4:88 front.
1965 D1100 4X4 - 345, T98, NP202, Dana 44s/4:09.
eightOsix is offline   Reply With Quote
Old 03-21-2014, 06:18 AM   #2
ihpartsjeff
Administrator & Owner
 
ihpartsjeff's Avatar
 
Join Date: Jan 2007
Member Number: 1
Location: Grass Valley, CA
Age: 44
Posts: 4,181
Default Re: T-18 slips out of 4th gear

Worn trans output bearing or the synchro engaging teeth on the main gear(no that's not the exact name for it but it is slipping my mind right now) is worn/worn out. Other possibility and easiest to fix is the poppet spring in the cover May have collapsed or broke. Either way that trans will probably need to come out again for a proper repair.
__________________

Jeff Ismail
IH Parts America - Owner
IH Sierra Fall Rallye Event Coordinator
Binder Books
CPT - Crawler Proven Technology
(530)274-1795
ihpartsjeff is offline   Reply With Quote
Old 05-07-2017, 05:56 PM   #3
eightOsix
Member
 
eightOsix's Avatar
 
Join Date: Aug 2009
Member Number: 1225
Location: Fraser, CO, at 9000 feet
Posts: 62
Default Re: T-18 slips out of 4th gear

To put this thread to bed upon pulling this transmission I found that the input shaft endplay was .024", twice the recommended maximum.
My theory is that since there were loose/missing bell to engine bolts, missing dowel pins and a broken retainer nose that the transmission input shaft got torqued and damaged over time.
I am replacing the transmission with a donor that has the recommended endplay.
__________________
Greg Foley
Fraser, CO

1966 Scout 800 "Black Dog"-152, Holley 1904, Pertronix,T18, D20, Dana 44/4:88 rear, Dana 27/4:88 front.
1965 D1100 4X4 - 345, T98, NP202, Dana 44s/4:09.
eightOsix is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 05:30 AM.