SBC Clutch Question - Great Lakes 4x4. The largest offroad forum in the Midwest

Go Back   Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > General Tech
GL4x4 Live! GL4x4 Casino

greatlakes4x4.com is the premier Great Lakes 4x4 Forum on the internet. Registered Users do not see the above ads.
Search
Reply
 
Thread Tools Search this Thread
Old February 25th, 2006, 02:13 PM   #1
BigBlkYJ 355
U-Joints Fear Me
 
BigBlkYJ 355's Avatar
 
Join Date: 11-05-05
Location: Clawson
Posts: 3,361
iTrader: (4)
Mentioned: 0 Post(s)
Default SBC Clutch Question

Wasn't sure which forum i should put this in, so i put it here...

Mating a SM465 tranny to small chevy motor. Got everything i needed to bolt the rest up today, however when i bolted everything up, the throwout bearing would not reach the pressure plate?! It was extended almost all the way out, and it would catch maybe the last 1/4" of the stroke on the pressure plate fingers. Its almost like the pressure plate is not far enough out from the flywheel and disc setup. Does anyone know why this could be happening? Im thinking that i have the wrong pressure plate, but i didn't know that there were different ones other than the clutch size difference. I can post pics if you would like.

Thanks,
Chris
BigBlkYJ 355 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old February 25th, 2006, 03:11 PM   #2
Yetti
Buy a Fiat! Save the UAW!
 
Yetti's Avatar
 
Join Date: 11-05-05
Location: 20 minutes south of Hell...
Posts: 14,385
iTrader: (10)
Mentioned: 2 Post(s)
Default

could be a couple of things. if you put the disc in upside down the presure plate may be compressed way to far, and it will NEVER disingauge. secondly is the clutch fork the right one for the trans? if you have the wrong fork then it won't extend far enough.
depending what set up you have I would expect the presure plate fingers should be right up even with the end of the input snout if you can see in the fork whole, if you see more then about 1/2" of spline then something is really wrong.
__________________
Yetti
Yetti is offline   Reply With Quote
Old February 25th, 2006, 03:21 PM   #3
PavementPounder
I am the law.
 
PavementPounder's Avatar
 
Join Date: 11-05-05
Location: Birmingham, Michigan 48009
Posts: 29,824
iTrader: (224)
Mentioned: 2 Post(s)
Default

I would say Chevy Tech.
PavementPounder is offline   Reply With Quote
Old February 26th, 2006, 12:16 AM   #4
BigBlkYJ 355
U-Joints Fear Me
 
BigBlkYJ 355's Avatar
 
Join Date: 11-05-05
Location: Clawson
Posts: 3,361
iTrader: (4)
Mentioned: 0 Post(s)
Default

actually i think a friend of mine may have been on the right track. the throwout bearing he said might have been wrong. yes i have an oe throwout in there, however i think the clutch was made for a "long" version. i picked that up tonight, and am going to try it tomorrow. if that dosn't work i think i will buy an entire new clutch setup.
BigBlkYJ 355 is offline   Reply With Quote
Old February 26th, 2006, 12:29 AM   #5
Yetti
Buy a Fiat! Save the UAW!
 
Yetti's Avatar
 
Join Date: 11-05-05
Location: 20 minutes south of Hell...
Posts: 14,385
iTrader: (10)
Mentioned: 2 Post(s)
Default

now that you mention it there is two different Throw out bearings, one is the standard car one that is about 1 1/2 thick and the other is about 3" thick
__________________
Yetti
Yetti is offline   Reply With Quote
Old February 26th, 2006, 10:39 AM   #6
BigBlkYJ 355
U-Joints Fear Me
 
BigBlkYJ 355's Avatar
 
Join Date: 11-05-05
Location: Clawson
Posts: 3,361
iTrader: (4)
Mentioned: 0 Post(s)
Default

yea i had that standard one and it didn't work. seems gm used that in everything from like 1969 and up to around 89 or so. this new one is from a chevelle i think. i dunno they gave me the book and i picked it out haha. murrays was the only place open and if u dont know EXACTLY what it came out of ur in trouble. :tonka:
BigBlkYJ 355 is offline   Reply With Quote
Old February 26th, 2006, 11:07 AM   #7
Yetti
Buy a Fiat! Save the UAW!
 
Yetti's Avatar
 
Join Date: 11-05-05
Location: 20 minutes south of Hell...
Posts: 14,385
iTrader: (10)
Mentioned: 2 Post(s)
Default

if your set up is so old , do you have the stamped steel clutch fork or the cast steel one that reachs all the way acrossed the inside of the bell housing?
__________________
Yetti
Yetti is offline   Reply With Quote
Old February 26th, 2006, 12:31 PM   #8
BigBlkYJ 355
U-Joints Fear Me
 
BigBlkYJ 355's Avatar
 
Join Date: 11-05-05
Location: Clawson
Posts: 3,361
iTrader: (4)
Mentioned: 0 Post(s)
Default

This is a stamped steel one, its brand new i bought the throwout bearing, slave and fork brand new so that i would not have to deal with stuff like this Anyways i think the new throwout fixed it. It seems to be lined up right now, but i cannot test it until mumblies gets a master cylinder adapter in. So tuesday i should know for sure if its going to work. The only problem i see as of right now is there isn't really any clearance between the fingers and the throwout. i heard there was suppose to be like 1/16" or something like that. The throwout is not applying pressure, so its not holding it in or anything, its just going to spin all the time i think. a return spring wont help either.
BigBlkYJ 355 is offline   Reply With Quote
Old February 26th, 2006, 12:37 PM   #9
Yetti
Buy a Fiat! Save the UAW!
 
Yetti's Avatar
 
Join Date: 11-05-05
Location: 20 minutes south of Hell...
Posts: 14,385
iTrader: (10)
Mentioned: 2 Post(s)
Default

its ok that it touches, almost all hydrolic systems touch, if you had a mechanical one then it would have what we call "toe clearence" that is measured at the pedal. you should have full release within about 3-4 inches of pedal travel, so if its not releasing completely check everything real good.
__________________
Yetti
Yetti is offline   Reply With Quote
Old February 26th, 2006, 01:55 PM   #10
BigBlkYJ 355
U-Joints Fear Me
 
BigBlkYJ 355's Avatar
 
Join Date: 11-05-05
Location: Clawson
Posts: 3,361
iTrader: (4)
Mentioned: 0 Post(s)
Default

awesome, really appreaciate all the help
BigBlkYJ 355 is offline   Reply With Quote
Reply
Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > General Tech

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Forum Jump


All times are GMT -5. The time now is 04:10 PM.


Powered by: vBulletin, Copyright 2000 - 2012, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Page generated in 0.18874 seconds with 50 queries