73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 1979C20 on February 22, 2012, 11:07:26 am
-
My clutch is starting to get low. I'm trying to decide if I need to buy a clutch kit, or If I can just buy the clutch disk and get on with my life. The issue is, The cheapest clutch kit I can find locally is 150. I can get just the disk for 51 and a throwout bearing for 17. So, 68 sounds a lot better than 150. Would you advice against not replacing the pressure plate? Or is it not that big of a deal to use my old pressure plate?
-
I've always replaced everything with new while I was in there. I never use re manufactured either. That's too much hassle to not do everything with good quality parts.
Be patient and save up for the good stuff you will not regret it.
-
Well, I was really considering replacing just my throwout bearing until I looked uo the price for just the clutch disk. Would it hurt anything if I didnt replace the pressure plate?
-
Would it hurt anything if I didnt replace the pressure plate?
If yours is in good working condition...no. It is good practice though.
Taking out a sm465 is not something most people want to do very often so everything usually gets replaced while it is out.
I have mixed and matched clutch components before with varied results.
-
Whats wrong with removing the SM465? I find it quite easy. Unscrew the shifter boot, remove the shifter handle, pull the carpet up, unbolt the bolts in the dog house, jack under the tranny, unbolt the cross member from the frame and tranny, drop cross member, unbolt driveshaft, unbolt 4 bolts from tranny to bell housing, lower and slide back the tranny, unbolt bell housing from engine. Not too hard. Probably take me 45 minutes to remove it.
-
When I was 16 I had an 80 stepside with 6 cyl and 3spd on the tree. I didn't have much money so I would go to the salvage yard and get a used clutch disk and put it in. I never had a problem. I just got really good and quick at replacing it. LOL. I know its best to replace all that you can but when your in a bind it works.
-
Whats wrong with removing the SM465? I find it quite easy. Unscrew the shifter boot, remove the shifter handle, pull the carpet up, unbolt the bolts in the dog house, jack under the tranny, unbolt the cross member from the frame and tranny, drop cross member, unbolt driveshaft, unbolt 4 bolts from tranny to bell housing, lower and slide back the tranny, unbolt bell housing from engine. Not too hard. Probably take me 45 minutes to remove it.
I think you have answered your question. My questions to you is does the clutch let out just off the floor or all the way at the top? If just off the floor your pressure plate is weak. Do you have any chatter or vibration as you let the clutch out? If you do you have hot spots and you should have the flywheel ground.
Personally I would do it right the first time with everything new. I am dreading it on my 85. I am pretty sure my center hump is not bolted in, it is part of the floor. Having to remove anything interior wise except the shifter and boot makes the job a little easier however I may have to loosen the original exhaust system because the trans just can't go straight back as it will hit the floor. That SM465 is a heavy dude...
-
The clutch is all the way at the top of the pedal, about 1/2-3/4 inch of clutch on the pedal. No shaking or vibration etc. I never rode the clutch or anything dumb. Its just the disk is getting low and the throwout bearing is yelling at me. If i push the pedal all the way to the floor and move my foot off to the side of it it pops right back up.
-
Check to see if the throw out bearing has worn the clutch fingers that it rides on. If not just replace what you are wanting. For the $82 difference though why take the chance unless you really like to wrestle that trans in and out when the pressure plate goes... My $.02
-
SOunds to me like $150 is pretty cheap for piece of mind. I wouldn't do just half of it just on principal.
If the disk is worn, and you never rode it then the plate is probably weak, and has let it slip. Every clutch I have replaced over the years in a vehicle that wasn't abused the main problem is the plate, and the bearing. The disk useually still has wear left on it even when the clutch isn't holding good.
-
If it was me I would replace the assembly and I would also pull the flywheel and have it surfaced.
-
I am with everyone else on replacing everything. But when money is tight and you just don't have it and need to get it fixed, replace the 2 items you mentioned.
But make darn sure you inspect the pressure plate and flywheel very thoroughly, if not and they are damaged your new parts in a very short amount of time will be bad just like the other componets.
-
Alright, thanks for the help guys. I'll see how much money I can pull together and I'll try and get the whole kit. Where can I get my flywheel surfaced?
-
You may have to call around some but any machine shop that has been in business for a while should be able to resurface it.
-
Can it be surfaced on a brake lathe?
-
Never actually seen it done however the ones I have had done hasn't looked like they were done like that, the finish was not like a rotor.
-
I'm not sure what is normally done but it could be done on a surface grinder or engine lathe in no time flat. Any machine shop, even one that doesn't do engine work, should be able to surface it.
-
I talked to a guy at checker and he said they send them out to be surfaced, and its costs 40 bucks.
-
If you do deceide to use the old pressure plate, mark it as to where it came off of the flywheel so you can put it back in the original location.
If using a reman cover with a resurfaced flywheel, then marking it is not necessary.
My advice is to never mix a new/reman pressure plate without machining the flywheel. Likewise, putting a unresurfaced pressure plate on a resurfaced flywheel is asking for trouble as well.
-
If you do deceide to use the old pressure plate, mark it as to where it came off of the flywheel so you can put it back in the original location.
If using a reman cover with a resurfaced flywheel, then marking it is not necessary.
My advice is to never mix a new/reman pressure plate without machining the flywheel. Likewise, putting a unresurfaced pressure plate on a resurfaced flywheel is asking for trouble as well.
Took the words right out of my mouth.
-
Any machine shop with a blanchard grinder, or a surface grinder can do it. A buddy of mine has done a couple of mine on a bridgeport. Everyone told me that it wouldn't work, that it would chatter. the guy that owns the bridgeport said, eh they are full of crap. he was right. they worked perfectly. I have also seen them done on a brake lathe, that also worked just fine.