TH400 not holding in park - Off-Road Forums & Discussion Groups
Jeepster-American Jeepster Club Please also visit our club web site for more information at http://www.americanjeepsterclub.org/

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 08-13-2002, 09:59 AM Thread Starter
Journeyman
 
Join Date: May 2002
Location: Ca. Bay Area
Posts: 148
Thanks: 0
Thanked 0 Times in 0 Posts
 
TH400 not holding in park

Still working out some of the bugs on my jeepster, one problem is that the tranny doesn't hold in park. It shifts fine. I haven't gotten underneath and checked the linkage yet, but barring that, what kind of a job am I looking at? Also if it is an internal problem what's it cost to remove/rebuild/replace a TH400? (gonna break it to the wife slowly)
Phytoplankton is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 08-13-2002, 02:31 PM
Veteran
 
thomjpster's Avatar
 
Join Date: Jun 2001
Location: Greeley CO
Posts: 886
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: TH400 not holding in park

If memory serves me correctly, the park "paw" is in the back of the tranny under everything, but not inside the rear housing/adapter. I think you can see some of it from the bottom when the pan is removed.
Double check the linkage. It should move fully to park position with some extra force.
When parked, there is a lever that moves over a grabs a cog type gear on the output shaft, thus locking the shaft to the case.
it is moved by a rod connected to the shifting shaft. This rod is spring loaded to the lock lever. That way if you hit park while still moving, you hear grinding before the lever grabs a tooth.
thomjpster is offline  
post #3 of (permalink) Old 08-13-2002, 08:55 PM
Enthusiast
 
kingcarnut's Avatar
 
Join Date: Feb 2002
Location: Latrobe, Pa
Posts: 375
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: TH400 not holding in park

Has the tranny ben worked on lately? When I had my th400 rebuilt, the shop put the park linkage plate in backwards and it wouldn't stay in park on hills. You need to drain the trans, remove pan and filter. Find the metal cover over the parking gear plunger, it has two bolts through it and can be bolted in either way, common mistake to put it in backward.
Look for a th400 rebuild book at B&N or Borders and look up parking linkage and it discusses this in detail.
Just my .02
kingcarnut is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 08-14-2002, 09:19 AM Thread Starter
Journeyman
 
Join Date: May 2002
Location: Ca. Bay Area
Posts: 148
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: TH400 not holding in park

Hasn't been worked on to my knowledge, I just bought it back in June, and it's basically been sitting my garage while I rebuild the doors and get a hard top ready to put on it. The tranny didn't hold in park when I bought it. I contacted a website for trannies at http://www.quality-trans.com They have a question/answer guy. Chances are it's just a loose linkage, I have to disconnect the linkage and see if I can manually put it in park. If that doesn't work he said the parking pawl can be replaced without dropping the tranny, just remove the pan, probably the pawl return spring. WOW good news for once!
Phytoplankton is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome