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 > Transmissions and Rear Ends


Transmissions and Rear Ends Three on the tree or four in the floor? Shift it all here.

Reply
 
Thread Tools
  #31  
Old September 14th, 2013, 02:10 AM
BarryGMC BarryGMC is offline
Banned
 
Join Date: Jan 2013
Location: Banned City
Truck: None. Sold them all and became a hermit.
Posts: 591
Rep Power: 0
BarryGMC is on a distinguished road
Default Re: Sm318 Transmission Plugs and Transfer case plugs

Still wondering what was squealing?
Reply With Quote
  #32  
Old September 14th, 2013, 02:24 AM
FetchMeAPepsi's Avatar
FetchMeAPepsi FetchMeAPepsi is offline
-= Dues Paid =-
 
Join Date: Jan 2013
Location: Edmond, Ks
Truck: 1962 4x4 GMC CECILIA
Posts: 1,724
Rep Power: 545
FetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of light
Default Re: Sm318 Transmission Plugs and Transfer case plugs

yes, Im thinking it was the throwout bearing because of the shiny spots on the three fingers of the pressure plate? IDK if that's what its called. Here's a pic







If that was it then this clutch kit will fix the problem. Is there something I should check inside the transmission?

And is it supposed to leak fluid out of the tail piece a little or is that a bad seal?
__________________
Step by steps:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Some people are like slinkys. Not worth much but funny as heck when pushed down stairs.
__________________
If the women don't find you handsome, they should at least find you handy.
Reply With Quote
  #33  
Old September 14th, 2013, 04:27 AM
BarryGMC BarryGMC is offline
Banned
 
Join Date: Jan 2013
Location: Banned City
Truck: None. Sold them all and became a hermit.
Posts: 591
Rep Power: 0
BarryGMC is on a distinguished road
Default Re: Sm318 Transmission Plugs and Transfer case plugs

Dang a whole post written then splat. Dead like a bug. The clutch spins at say 2000 rpm and the bearing is at 0 when the two touch there is some slippage. This is normal and causes the polishing you see. The noise you described sounds more like a cluster gear problem. These little 3 speeds are not to robust and when they get a bit low on oil things can go haywire. Now you need to visualize the load in, float ,and deceleration load. Each makes a distinct sound. So do the problems. It's like a loose rod bearing in an engine makes most noise in the float. It rattles. Not so much under load in and out. Now this is why you always look at the oil when you drain it. A bright light is helpfull. Does it look really dark? Or is it metallic looking? And if so brassy or silver? These things tell you a lot. You need to investigate these things. Maybe look at a drawing of your trans to help visualize what is going on in there. And no this thing should not leak. If it was mine I would open her up and at least check it out.
Reply With Quote
  #34  
Old September 14th, 2013, 02:37 PM
FetchMeAPepsi's Avatar
FetchMeAPepsi FetchMeAPepsi is offline
-= Dues Paid =-
 
Join Date: Jan 2013
Location: Edmond, Ks
Truck: 1962 4x4 GMC CECILIA
Posts: 1,724
Rep Power: 545
FetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of light
Default Re: Sm318 Transmission Plugs and Transfer case plugs

It was dark, VERY dark. There were some silver bits down around the bottom, but just a little dusting. Enough to cover your finger tip with a light coating. I've seen more in a modern oil drain plug so I wasn't concerned.

To open it up I just pop off the bolts on the front and the ones on the side? I'm worried about a bunch of springs and gears flying out at me
__________________
Step by steps:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Some people are like slinkys. Not worth much but funny as heck when pushed down stairs.
__________________
If the women don't find you handsome, they should at least find you handy.
Reply With Quote
  #35  
Old September 14th, 2013, 10:31 PM
FetchMeAPepsi's Avatar
FetchMeAPepsi FetchMeAPepsi is offline
-= Dues Paid =-
 
Join Date: Jan 2013
Location: Edmond, Ks
Truck: 1962 4x4 GMC CECILIA
Posts: 1,724
Rep Power: 545
FetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of light
Default Re: Sm318 Transmission Plugs and Transfer case plugs

I jumped the gun and opened both front portions. Nothing seemed weird to me








The pilot bearing was discolored from heat. Do you think that's the issue? There wasn't much (if any) grease in the pocket. It took 12 fingertip fulls to fill it up during my tries to remove it.

__________________
Step by steps:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Some people are like slinkys. Not worth much but funny as heck when pushed down stairs.
__________________
If the women don't find you handsome, they should at least find you handy.
Reply With Quote
  #36  
Old September 15th, 2013, 05:20 AM
BarryGMC BarryGMC is offline
Banned
 
Join Date: Jan 2013
Location: Banned City
Truck: None. Sold them all and became a hermit.
Posts: 591
Rep Power: 0
BarryGMC is on a distinguished road
Default Re: Sm318 Transmission Plugs and Transfer case plugs

Input shaft bearing looks bad
Reply With Quote
  #37  
Old September 15th, 2013, 06:26 AM
BarryGMC BarryGMC is offline
Banned
 
Join Date: Jan 2013
Location: Banned City
Truck: None. Sold them all and became a hermit.
Posts: 591
Rep Power: 0
BarryGMC is on a distinguished road
Default Re: Sm318 Transmission Plugs and Transfer case plugs

the bearing should look like this
Attached Images
File Type: jpg 034.JPG (3.18 MB, Multiple views, 1 clicks)
Reply With Quote
  #38  
Old September 15th, 2013, 06:49 AM
BarryGMC BarryGMC is offline
Banned
 
Join Date: Jan 2013
Location: Banned City
Truck: None. Sold them all and became a hermit.
Posts: 591
Rep Power: 0
BarryGMC is on a distinguished road
Default Re: Sm318 Transmission Plugs and Transfer case plugs

the input shaft gear or clutch gear or whatever you want to call it. Its the gear in the front of the trans behind the input shaft bearing. looks to be to far forward. Its been a while since I have worked on a 318 so I will tell you what I recall. Biggest problem. Input shaft bearing fails from lack of lubrication and high loading. cluster gear thrust bearings fail from high torque load. v8 and 4x4 mostly. 2nd gear problems always seem prevalent. mainshaft needle bearings cook because of no lubrication. You know what the gears usually dont look to bad. So I already see 2 problems from your pics. This is why I dont work on these any more. its easier to put a 420 in its place. Barry
Reply With Quote
  #39  
Old September 15th, 2013, 02:24 PM
FetchMeAPepsi's Avatar
FetchMeAPepsi FetchMeAPepsi is offline
-= Dues Paid =-
 
Join Date: Jan 2013
Location: Edmond, Ks
Truck: 1962 4x4 GMC CECILIA
Posts: 1,724
Rep Power: 545
FetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of lightFetchMeAPepsi is a glorious beacon of light
Default Re: Sm318 Transmission Plugs and Transfer case plugs

I'll take some better pics today. I can't buy a new trans ($400-600?!?!) so I'm kinda stuck with what I have for now. Maybe I can pick up a cheap replacement trans and replace the input shaft? After I take new pics see if you still think it's bad. The rebuild kit includes front bearings if that makes a difference.

I tried to pull the flywheel too and couldn't figure out how to get to the bolts in it without removing the bellhousing (assuming the center threads I see from the back are the bolts that need removing). is there a trick to it?
__________________
Step by steps:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Some people are like slinkys. Not worth much but funny as heck when pushed down stairs.
__________________
If the women don't find you handsome, they should at least find you handy.
Reply With Quote
  #40  
Old September 15th, 2013, 02:37 PM
tommyduncan tommyduncan is offline
Senior Member
 
Join Date: Jul 2013
Location: Boulder City NV
Truck: 62 3/4ton 305 Hydramatic
Posts: 189
Rep Power: 114
tommyduncan is on a distinguished road
Default Re: Sm318 Transmission Plugs and Transfer case plugs

I can't help you with the tranny but the flywheel is held on by the center bolts right in the middle of where the clutch was. They are all facing the trans so shouldn't be a problem. Turning the engine with a big socket might give you better access to them as you go.
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: NP 205 transfer case Archiver Previous Forum Posts 0 April 17th, 2009 01:02 AM
NP 205 transfer case Archiver Previous Forum Posts 0 April 16th, 2009 01:10 AM
Re: 64 GMC transfer case Archiver Previous Forum Posts 0 April 15th, 2009 01:25 AM
64 GMC transfer case Archiver Previous Forum Posts 0 April 14th, 2009 05:52 AM
4x4 transfer case Archiver Previous Forum Posts 0 November 18th, 2005 12:57 AM


All times are GMT +1. The time now is 09:46 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd 681711554703|1710449172|0