She's started grinding... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Luvlegs · 10-16-2008, 02:46 PM

72 I6 3OTT - last fall replaced the throwout bearing - all good - I've put less than 200 miles on it this past year - slowly redoing everything from the ground up. Original transmission (I'd say about 120k on it).
I have NOT yet changed the tranny fluid - that's next. A new "heavy duty" clutch was put in just prior to me taking ownership. The truck has always shifted nicely although the linkage appears sloppy... I posted about the "cup" on the column that the shifter arm mounts to/in with almost no replies (seems loose and shift arm bounces/shakes).

Over the past 3 months, I've always felt I wasn't getting off the clutch smoothly going from 1st to 2nd as there was always a little "chatter/grab" for a split second. The faster I get off the clutch, the smoother the shift and no noise.
Lately, it has progressed to the point of not wanting to come out of gear at any speed or shift up or down at any speed.
At rest, no noise with clutch in or out or moving through the gears - I BELIEVE I have the clutch linkage adjusted properly from all I've read).
I almost have to slam the shift arm to get it to shift into 3rd and it will not go back into 2nd until almost not moving... it will but it takes effort and grinds.

I have read the FAQ on adjusting the linkage/column but not so sure that's where my problem is. I am not too familiar with synchro's and there function but hear the term thrown around alot.
The tranny will be getting swapped out with a T400 I have but I'm not ready to do it yet. I parked the truck as I'm working on it and it's not used daily (or even weekly as of late).
Any suggestions as to where to start and what to look for? (Short of opening the case up). Thanks all.

PanelDeland · 10-16-2008, 02:52 PM

Luv,sounds like the tranny has lost it's syncros to me.I hate to say it but they just don't last forever.Does it make noise in gear?

We may have to do a JY crawl and find you a TOT to get you thru to the powertrain swap.

Luvlegs · 10-16-2008, 02:59 PM

UGH! It doesn't make any noise in gear and will run like mad - it's just during the shifting.
I guess it might be a good idea to get the T400 in so I can put in my tilt...
And then since I have all that in, I'll convince the holder of the purse strings to let loose a bit so I can finish the 454 and get it hooked up... hmmm maybe not such an unfortunate circumstance after all.... unless she says "no"!

cdowns · 10-16-2008, 04:04 PM

have you ever checked the fluid level in the tranny?

BLACK AND BLUE 67-72 · 10-16-2008, 04:08 PM

Sounds like the syncros are bad...

Luvlegs · 10-16-2008, 04:41 PM

Quote:

Originally Posted by BLACK AND BLUE 67-72

Sounds like the syncros are bad...

The more I'm reading, the more it sounds like that is the case. Oh well... I needed the push to get the other stuff done anyhow.

gcburdic · 10-17-2008, 09:23 AM

Quote:

Originally Posted by Luvlegs

I guess it might be a good idea to get the T400 in so I can put in my tilt...
And then since I have all that in, I'll convince the holder of the purse strings to let loose a bit so I can finish the 454 and get it hooked up... hmmm maybe not such an unfortunate circumstance after all.... unless she says "no"!

D,

I'll write you a note if that's what you need to have the almighty purse string holder release funding to get that engine, tranny and tilt in!!!

Luvlegs · 10-17-2008, 10:08 AM

it might be easier if you just gave me the money

When the time is right...
when the time is right.

lesseeee.. about 1k to finish the engine, 6 c notes to rebuild the tranny and 4000 hours of my time... I should tackle the money part first - I don't think I'll ever get the time! hahahah

PanelDeland · 10-17-2008, 01:25 PM

Luv,Keep in mind that it's much easier to beg forgiveness than to recieve permission.So just do it and I'll almost garauntee you will be sleeping indoors by the end of next summer.

10-16-2008, 02:46 PM	#1
Luvlegs Registered User Join Date: Sep 2005 Location: Smith Mountain Lake Virginia Posts: 1,537	She's started grinding... 72 I6 3OTT - last fall replaced the throwout bearing - all good - I've put less than 200 miles on it this past year - slowly redoing everything from the ground up. Original transmission (I'd say about 120k on it). I have NOT yet changed the tranny fluid - that's next. A new "heavy duty" clutch was put in just prior to me taking ownership. The truck has always shifted nicely although the linkage appears sloppy... I posted about the "cup" on the column that the shifter arm mounts to/in with almost no replies (seems loose and shift arm bounces/shakes). Over the past 3 months, I've always felt I wasn't getting off the clutch smoothly going from 1st to 2nd as there was always a little "chatter/grab" for a split second. The faster I get off the clutch, the smoother the shift and no noise. Lately, it has progressed to the point of not wanting to come out of gear at any speed or shift up or down at any speed. At rest, no noise with clutch in or out or moving through the gears - I BELIEVE I have the clutch linkage adjusted properly from all I've read). I almost have to slam the shift arm to get it to shift into 3rd and it will not go back into 2nd until almost not moving... it will but it takes effort and grinds. I have read the FAQ on adjusting the linkage/column but not so sure that's where my problem is. I am not too familiar with synchro's and there function but hear the term thrown around alot. The tranny will be getting swapped out with a T400 I have but I'm not ready to do it yet. I parked the truck as I'm working on it and it's not used daily (or even weekly as of late). Any suggestions as to where to start and what to look for? (Short of opening the case up). Thanks all. __________________ "A cat will almost always blink when hit between the eyes with a ball peen hammer" (you don't always have to state the obvious) Wear your PPE! You can eat with false teeth but you can't see with a false eye. 1959 Studebaker Silverhawk 350/400 1972 C10 L6 3OTT 2005 F350 - Built - whew! Last edited by Luvlegs; 10-16-2008 at 02:51 PM.

10-16-2008, 02:52 PM	#2
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: She's started grinding... Luv,sounds like the tranny has lost it's syncros to me.I hate to say it but they just don't last forever.Does it make noise in gear? We may have to do a JY crawl and find you a TOT to get you thru to the powertrain swap. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

10-16-2008, 02:59 PM	#3
Luvlegs Registered User Join Date: Sep 2005 Location: Smith Mountain Lake Virginia Posts: 1,537	Re: She's started grinding... UGH! It doesn't make any noise in gear and will run like mad - it's just during the shifting. I guess it might be a good idea to get the T400 in so I can put in my tilt... And then since I have all that in, I'll convince the holder of the purse strings to let loose a bit so I can finish the 454 and get it hooked up... hmmm maybe not such an unfortunate circumstance after all.... unless she says "no"! __________________ "A cat will almost always blink when hit between the eyes with a ball peen hammer" (you don't always have to state the obvious) Wear your PPE! You can eat with false teeth but you can't see with a false eye. 1959 Studebaker Silverhawk 350/400 1972 C10 L6 3OTT 2005 F350 - Built - whew!

10-16-2008, 04:04 PM	#4
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: She's started grinding... have you ever checked the fluid level in the tranny? __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

10-16-2008, 04:08 PM	#5
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Re: She's started grinding... Sounds like the syncros are bad... __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA

10-17-2008, 10:08 AM	#8
Luvlegs Registered User Join Date: Sep 2005 Location: Smith Mountain Lake Virginia Posts: 1,537	Re: She's started grinding... it might be easier if you just gave me the money When the time is right... when the time is right. lesseeee.. about 1k to finish the engine, 6 c notes to rebuild the tranny and 4000 hours of my time... I should tackle the money part first - I don't think I'll ever get the time! hahahah __________________ "A cat will almost always blink when hit between the eyes with a ball peen hammer" (you don't always have to state the obvious) Wear your PPE! You can eat with false teeth but you can't see with a false eye. 1959 Studebaker Silverhawk 350/400 1972 C10 L6 3OTT 2005 F350 - Built - whew!

10-17-2008, 01:25 PM	#9
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: She's started grinding... Luv,Keep in mind that it's much easier to beg forgiveness than to recieve permission.So just do it and I'll almost garauntee you will be sleeping indoors by the end of next summer. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"



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