Gain extra benefits by becoming a Supporting Member Click here find out how!

Classic Performance Products Classic Parts
American Auto Wire Classic Industries
Danchuk Catalog
Hellwig Products IncPerformance Rod & CustomNu-Relics Power Windows



Username Post: Clutch adjustment issue        (Topic#359312)
MikeH 
Senior Member
Posts: 105

Loc: Abington, MA
Reg: 09-24-02
12-31-19 01:33 PM - Post#2783331    

Problem: Not able to get into reverse, or, downshift to first gear when car warms up. Have tried adjusting for high and low release with no change in issue.
Equipment specs: 57 Chevy; 4 year old 350ci/290hp crate motor; cast iron 37290001 (1955 auto) bell housing; Centerforce 12" (Mod CFT361909) clutch; Lakewood adjustable pivot ball; no block saver plate;short throw-out bearing; new rebuild of Muncie M21 tranny.
This system worked on my old 350 engine but cannot for the life of me figure what is going on now.
Anything stupid I am missing? I have not been on the site in a while so I may have missed an earlier post.
Thanks for any ideas,
MikeH





 


YOUNG57 
Frequent Contributor
Posts: 1171

Loc: Tennessee
Reg: 12-06-10
01-01-20 08:11 AM - Post#2783390    
    In response to MikeH

“This system worked on my old 350…”

The fly in the ointment is “new rebuild of Muncie M21 tranny”.




 
bobb 
Super Senior Member
Posts: 5517

Loc: paradise
Reg: 09-05-03
01-01-20 11:15 AM - Post#2783424    
    In response to MikeH

happy new year. how well is your bellhousing aligned? are the front and rear surfaces parallel? is your bellhousing aligned in 3d? i know these are weird questions but think for a bit. if your bellhousing were misaligned by 1/4 inch in any way your clutch disc will not be anything near sitting flat against the flywheel and you will not have enough pedal to overcome it. yes 1/4 inch is next to impossible but it makes it easier to imagine the misalignment issue. your trans input shaft is an extension of the crank centerline and should be dead on balls straight.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
fuzz1957 
Contributor
Posts: 582

Loc: NE IA
Reg: 02-18-08
01-02-20 08:45 PM - Post#2783559    
    In response to bobb

No answer to your question, but: M21 muncie isn’t, IMO, the wise choice for a transmission. Geared wrong for your application. M20 is what you should use.

Fuzz

MAGA




 
MikeH 
Senior Member
Posts: 105

Loc: Abington, MA
Reg: 09-24-02
01-03-20 04:01 AM - Post#2783571    
    In response to fuzz1957

"New" tranni rebuild is 5 years years old, just not very many miles on it. Worked fine with the old motor. Bell alignment is fine. M21 works very well with my 3:08 rear.

Still looking for answers and have another set of eyes coming over tomorrow.

Thanks for the input!



 
bobb 
Super Senior Member
Posts: 5517

Loc: paradise
Reg: 09-05-03
01-04-20 09:39 AM - Post#2783672    
    In response to MikeH

i assume you mean grinding not going into gear and downshifting into 1st while rolling. pilot bushing?

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
MikeH 
Senior Member
Posts: 105

Loc: Abington, MA
Reg: 09-24-02
01-04-20 12:25 PM - Post#2783679    
    In response to bobb

You know I just took the pilot bushing out this morning for a look with an old friend with a lot more experience than I. It is a "short" self centering bearing and the thin flange that is away from the engine looks like it is bent a little. There is also some metal gouging in the area where the fork rests. My friend suggests I try the long bearing but he is not sure it will fit.
The other question we had was what fork do we use in my application?
The Centerforce clutch still looks new and the diaphram fingers show even wear.
The plot thickens!




 
bobb 
Super Senior Member
Posts: 5517

Loc: paradise
Reg: 09-05-03
01-04-20 08:24 PM - Post#2783707    
    In response to MikeH

your losing me here. pics would help. the longest t o bearing you can get in there will probly give you the best clutch fork geometry. i believe mcleod make a nice adjustable t o bearing. i will assume you know that the fork does not clip onto the t o bearing but just fits into the groove. need pics.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 


Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

227 Views
FusionBB
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 0.157 seconds.   Total Queries: 16   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 08:35 PM
Top