6066 (1960-1966) GMC Truck Club Bitcoin now accepted here! 
Pay Dues
Pay Dues or become a Site Supporter
 



Go Back   6066 (1960-1966) GMC Truck Club > 6066 GMC Truck Club Forum > General Discussion


General Discussion Sit down and chat with fellow members! Any topics that don't fit other categories goes here.

Reply
 
Thread Tools
  #1  
Old December 22nd, 2023, 02:22 PM
Troyport Troyport is offline
Member
 
Join Date: Jan 2023
Location: Hiram Ohio
Truck: 68 2500
Posts: 33
Rep Power: 20
Troyport is on a distinguished road
Default Clutch pivot arm

Hi all, doing a clutch on my 68 GMC 351 V6 with the NP435. Had the clutch and pressure plate rebuilt to assure correct parts. Bought a new clutch fork and it is identical to the worn out one that I removed. Welded and hand ground the pivot ball, because I couldn't find a new one, conforms to the socket perfectly, snaps in nice. New throwout bearing, same as old one. Ready for tranny install. However, I can see that the throwout bearing will not be centered on the fork. That is, the ears of the fork will not sit at 12 o'clock and 6 o'clock. Looks like the fork is short. I am looking at it through the bell housing where the transmission will bolt up, I have the truck high enough that I can sit on the ground and look perfectly level at the pressure plate, so I can hold the throwout bearing by hand perfectly centered on the pressure plate, and the fork ears are about 11:30 and 6:30, and will get more off center when the clutch pedal is depressed. Is this okay? Or do I have the wrong clutch pivot fork? (that is, the new one and therefore the old one, are wrong.

Last edited by Troyport; December 22nd, 2023 at 02:32 PM.
Reply With Quote
  #2  
Old December 22nd, 2023, 06:59 PM
AZKen's Avatar
AZKen AZKen is offline
Senior Member
 
Join Date: Jul 2014
Location: AZ
Truck: 6066GMC
Posts: 1,605
Rep Power: 514
AZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really nice
Default Re: Clutch pivot arm

6:30 and 11:30 is sure not that far off. Don't understand why same parts as removed would not work. Especially if new parts said used in GMC V6. It is quite common for folks to put the throwout bearing on backwards, but don't know if that creates what you see.
Try to search internet to examine pics of a GMC clutch install.

You didn't say if it functions, you just say it doesn't "look" right?
I just answered because I saw you had no responses. This will bring more.
Reply With Quote
  #3  
Old December 23rd, 2023, 02:31 AM
Troyport Troyport is offline
Member
 
Join Date: Jan 2023
Location: Hiram Ohio
Truck: 68 2500
Posts: 33
Rep Power: 20
Troyport is on a distinguished road
Default Re: Clutch pivot arm

I don't know if it works, just didn't think it looked right. The throwout bearing is correct. I just figured perfectly centered is better, and was on my 68 c10 L6, so was hoping someone could say "yes, that's the way they look in our trucks" or "No, something is wrong"
Reply With Quote
  #4  
Old December 23rd, 2023, 05:33 PM
Jim A Jim A is offline
Senior Member
 
Join Date: Jan 2013
Location: Potter Valley, CA
Truck: 1960 3/4, 4 spd, stepside
Posts: 138
Rep Power: 109
Jim A is on a distinguished road
Default Re: Clutch pivot arm

It is a terrible PITA to put it all back together and find it doesn't work.
It does seem that if you are using identical replacements, the fact that they seem off may be OK and the way they are supposed to be.
I did the whole routine recently with a '60 4 speed Muncie with good results; it may not be similar enough to of help,
Reply With Quote
  #5  
Old December 23rd, 2023, 10:07 PM
Prowbar Prowbar is offline
Senior Member
 
Join Date: Dec 2020
Location: Friesland, the Netherlands
Truck: 1965 GMC 1500, 478 V6, SM420
Posts: 386
Rep Power: 183
Prowbar is a jewel in the roughProwbar is a jewel in the roughProwbar is a jewel in the roughProwbar is a jewel in the roughProwbar is a jewel in the roughProwbar is a jewel in the rough
Default Re: Clutch pivot arm

A (good and well-taken) picture is worth a thousand words...
Reply With Quote
  #6  
Old December 25th, 2023, 01:23 AM
Troyport Troyport is offline
Member
 
Join Date: Jan 2023
Location: Hiram Ohio
Truck: 68 2500
Posts: 33
Rep Power: 20
Troyport is on a distinguished road
Default Re: Clutch pivot arm

I have read that the aftermarket pivot forks are junk, so I found a nice used OEM fork. I will put that one in and see how it looks, and report back..
Reply With Quote
  #7  
Old December 25th, 2023, 01:45 AM
lizziemeister'sV6 lizziemeister'sV6 is offline
-= Dues Paid =-
 
Join Date: Aug 2013
Location: Strawberry Point, Iowa
Truck: 1965 Suburban Series 1000 - 351M with mechancal tachometer - PS & PB & 2 speed Pow-R-Flow automatic
Age: 70
Posts: 227
Rep Power: 135
lizziemeister'sV6 will become famous soon enoughlizziemeister'sV6 will become famous soon enough
Default Re: Clutch pivot arm

It's a shame that aftermarket manufacturers are allowed to PRODUCE and SELL POS to rebuilders/restorers that put their trust in them to receive an item that is equal to or better than the OEM. The main issue is that most if not all the items are from overseas companies who give a rats *** in workmanship and engineering - the really sad part is that these so called REPRO parts suppliers was once legit United States of America owned and operated. I have no time for foreign crap and will search for OEM either NOS or used parts when needed.
Reply With Quote
  #8  
Old December 25th, 2023, 01:49 PM
George Bongert George Bongert is offline
Senior Member
 
Join Date: Jan 2013
Location: Oshkosh Wisconsin
Truck: Former owner Repowered by GMC 305 V-6, 1963 Chevy 30 Series SM420 Long Bed (9') Step/Fenderside
Posts: 210
Rep Power: 141
George Bongert will become famous soon enoughGeorge Bongert will become famous soon enoughGeorge Bongert will become famous soon enough
Default Re: Clutch pivot arm

Quote:
Originally Posted by lizziemeister'sV6 View Post
It's a shame that aftermarket manufacturers are allowed to PRODUCE and SELL POS to rebuilders/restorers that put their trust in them to receive an item that is equal to or better than the OEM. The main issue is that most if not all the items are from overseas companies who give a rats *** in workmanship and engineering - the really sad part is that these so called REPRO parts suppliers was once legit United States of America owned and operated. I have no time for foreign crap and will search for OEM either NOS or used parts when needed.
Most of the aftermarket parts for our trucks (and other vehicle restorations) come from CHINA where they really don't give a d*mn about quality or the correctness of the part being reproduced!! It's time that we cut all ties with foreign manufacturers (ESPECIALLY CHINA) of REPRO parts for our vehicles whether they are antique or late model!! The USA MUST COME FIRST and bring those manufacturers who left the USA for "greener pastures" back home where they belong!!
Reply With Quote
  #9  
Old December 25th, 2023, 02:28 PM
Troyport Troyport is offline
Member
 
Join Date: Jan 2023
Location: Hiram Ohio
Truck: 68 2500
Posts: 33
Rep Power: 20
Troyport is on a distinguished road
Default Re: Clutch pivot arm

Roger that!
Reply With Quote
  #10  
Old December 25th, 2023, 06:51 PM
Troyport Troyport is offline
Member
 
Join Date: Jan 2023
Location: Hiram Ohio
Truck: 68 2500
Posts: 33
Rep Power: 20
Troyport is on a distinguished road
Default Re: Clutch pivot arm

Attached is a picture with the aftermarket fork. Linkage is temporarily installed and adjusted snug to hold the bearing for the purpose of this picture. Thoughts? Thanks.
Attached Images
File Type: jpg 20231225_133111.jpg (3.08 MB, Multiple views, 18 clicks)
Reply With Quote
Reply

Bookmarks

Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Re: 1966 Stepside Pickup Wiper Transmission Pivot/Wiper Arm Engagement Question Archiver Previous Forum Posts 0 October 23rd, 2009 01:57 AM
Re: 1966 Stepside Pickup Wiper Transmission Pivot/Wiper Arm Engagement Question Archiver Previous Forum Posts 0 October 23rd, 2009 01:55 AM
1966 Stepside Pickup Wiper Transmission Pivot/Wiper Arm Engagement Question Archiver Previous Forum Posts 0 October 23rd, 2009 01:06 AM
Re: [6066 GMC] 1966 Stepside Pickup Wiper Transmission Pivot/Wiper Arm Engagement Question Archiver Previous Forum Posts 0 October 23rd, 2009 01:04 AM
Idler Arm and Pitman Arm Numbers Archiver Previous Forum Posts 0 February 9th, 2005 12:57 AM


All times are GMT +1. The time now is 05:55 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd 491713751242|1712638508|0