triumphs
[Top] [All Lists]

re; setting tranny rail release loads

To: triumphs@autox.team.net
Subject: re; setting tranny rail release loads
From: CarlSereda@aol.com
Date: Thu, 24 Feb 2005 03:39:33 EST
On TR4 transmissions the reverse shift rail gets a blunted (flat tip) plunger 
set up to release at 27lbs. After CT9898 the 3rd-4th rail gets a pointed 
plunger and spring (superceding the ball bearing and spring) and set to release 
at 
27lbs. The 1st-2nd rail gets a ball bearing and spring tensioned to release 
at 33lbs. 
I could not raise my release load to 33lbs on my 1st-2nd rail using the ball 
bearing/spring combo but was able to using a plunger and spring.
I agree with Randall that ball bearings effects a smoother, easier shift, so 
I'm not sure I did the right thing installing a plunger but at least I was 
able to reach factory specs.
ps; I did slip in some odd little washers in with the springs to zero in on 
the exact factory  'release loads' because those fat factory 'distance pieces' 
left me either under or over.
Carl
'63 TR4 since '74

--------------
Have had apart and back together the top cover containing the shift lever 
rails.
Now to fit into the detents in the rails there are there are ball bearings, 
plungers, and springs. I have three different assemblies for the three 
different rails and neither Haynes nor Bentley shows my particular collection:
1. Plunger with pointy tip, spring, and distance piece.
2. Plunger with blunt tip (not from wear), spring, and distance piece
3. Ball bearing with heavier spring and no distance piece.
Now the reverse rail has a much wider detent than the 1/2 or the 3/4 rails, 
whose detents appear the same as each other. The books, in two different 
drawings, indicate one plunger and two ball bearing setups, with the 
plunger for the reverse rail. To me it appears the wider detent in the 
reverse rail should accept the ball bearing.
How can I figure this out, anybody?




<Prev in Thread] Current Thread [Next in Thread>
  • re; setting tranny rail release loads, CarlSereda <=