1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Pilot bearing seal question

Thread Tools
 
Search this Thread
 
Old Apr 10, 2021 | 03:18 PM
  #1  
mwpayne's Avatar
Thread Starter
Admitted 'rexaholic'
Tenured Member: 20 Years
Liked
 
Joined: May 2002
Posts: 2,235
Likes: 19
From: Seymour, TN
Pilot bearing seal question

Just got a pilot bearing and seal for my 12a. Not sure how to orient the seal?
This car was an auto, I’m installing a 5 speed so no old ones to go by.
Seal go in first with rubber side facing rear or toward bearing?
Thanks
Reply
Old Apr 10, 2021 | 04:26 PM
  #2  
LongDuck's Avatar
84SE-EGI helpy-helperton
Tenured Member: 20 Years
Liked
Loved
Community Favorite
 
Joined: Oct 2002
Posts: 3,584
Likes: 542
From: Phoenix, AZ
The bearing goes in the hole first, you lube the bearing LIGHTLY, then the seal goes on top of the bearing with the tapered portion facing the trans input shaft. This way, the shaft is guided by the seal into the bearing. If you overdo the lube on the bearing and seal, you'll get hydrostatic lock when you try to insert the transmission input shaft, which makes it impossible to mate the trans to the engine.

Also, don't hammer the bearing into place. Tap it lightly. It's delicate, and should go in smoothly so you don't damage the race.
Reply
Old Apr 10, 2021 | 05:46 PM
  #3  
mwpayne's Avatar
Thread Starter
Admitted 'rexaholic'
Tenured Member: 20 Years
Liked
 
Joined: May 2002
Posts: 2,235
Likes: 19
From: Seymour, TN
Seal orientation

Just so I’m clear, this side toward trans?
Reply
Old Apr 10, 2021 | 06:01 PM
  #4  
LongDuck's Avatar
84SE-EGI helpy-helperton
Tenured Member: 20 Years
Liked
Loved
Community Favorite
 
Joined: Oct 2002
Posts: 3,584
Likes: 542
From: Phoenix, AZ
You want the tapered portion serving as an inlet for the trans input shaft. Think of it like providing a rubber "ramp" to help the trans input shaft to center up to the Pilot Bearing. In truth, it probably doesn't matter which way it goes in, as long as you have one in place. When the bearing grenades, the seal disintegrates, anyway. Here's my attempt at an ascii picture;

Transmission input shaft, Pilot Bearing Seal, and Pilot Bearing: □》□
Reply
Old Apr 10, 2021 | 06:11 PM
  #5  
t_g_farrell's Avatar
Waffles - hmmm good
Tenured Member: 20 Years
Community Favorite
iTrader: (1)
 
Joined: Jul 2004
Posts: 9,250
Likes: 464
From: Lake Wylie, N.C.
Rubber toward the bearing (just like the ones on the brake rotors or the main seal on the back of the engine.
Reply
Old Apr 10, 2021 | 06:23 PM
  #6  
mwpayne's Avatar
Thread Starter
Admitted 'rexaholic'
Tenured Member: 20 Years
Liked
 
Joined: May 2002
Posts: 2,235
Likes: 19
From: Seymour, TN
Thanks guys!
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
whitetiger
3rd Generation Specific (1993-2002)
3
Oct 5, 2019 06:13 AM
Ex-Eg-Driver
2nd Generation Specific (1986-1992)
2
Sep 5, 2008 07:24 AM
kanuk93gt
2nd Generation Specific (1986-1992)
2
Apr 7, 2007 02:20 AM
books
3rd Generation Specific (1993-2002)
5
Jun 10, 2006 05:58 PM
broken93
3rd Generation Specific (1993-2002)
2
Aug 19, 2004 01:54 PM




All times are GMT -5. The time now is 06:48 PM.