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05-19-2008, 12:10 AM | #1 | |
FarmBoy.
Join Date: Feb 2005
Location: Rhinelander, WI
Posts: 1,103
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Bad shifting noises...
Hey all.
My ol' 3 speed has been acting up lately. When I downshift from 3rd to 2nd, there is an odd grinding sound. I figured it was the clutch not being adjusted right. so, adjusted the clutch, it's still there. If i take my time shifting, and let it spin some, it seems to slide right on home. We're kind of thinking it's a pilot or throw out bearing, and when it's allowed to spin between shifting, it centers itself. Sloppy input shaft, or bad detents also were considered. any comments, advice, previous experience, 2 cents would be great on this. thanks in advance all! -Sam.
__________________
1969 GMC C1500. long fleet. 307. 3 on the tree. 3.07 gears. Oliver green. Bent and bruised. Daily Driver. Quote:
http://67-72chevytrucks.com/vboard/s...d.php?t=242993 |
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05-19-2008, 12:26 AM | #2 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,228
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Re: Bad shifting noises...
The syncronizers are bad. 2nd & 3 rd gears have syncros. that adjust the speed of the shaft before it engauges.
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05-19-2008, 12:46 AM | #3 | |
FarmBoy.
Join Date: Feb 2005
Location: Rhinelander, WI
Posts: 1,103
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Re: Bad shifting noises...
thank you!
I thought it might be that, but was leaning towards something more clutch related. alright. I have a spare 3 speed in a parts truck I'll pull soon. Also, please forgive my amateurness, but, will driving it be an issue? heh. as in, is this sucker gonna grenade on me? or, if i drive nice (double clutch maybe?) it'll last for a little bit. thanks again! -Sam.
__________________
1969 GMC C1500. long fleet. 307. 3 on the tree. 3.07 gears. Oliver green. Bent and bruised. Daily Driver. Quote:
http://67-72chevytrucks.com/vboard/s...d.php?t=242993 |
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05-19-2008, 12:50 AM | #4 |
Senior Member
Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,883
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Re: Bad shifting noises...
You can still drive it like that as long as you match speeds before shifting,ie,when downshifting rev it a bit,and when up-shifting,let it fall to where it will be after the shift.
__________________
'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. |
05-19-2008, 12:52 AM | #5 | |
FarmBoy.
Join Date: Feb 2005
Location: Rhinelander, WI
Posts: 1,103
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Re: Bad shifting noises...
alright, thanks so much guys.
It's always easier to solve a problem when it's more than just my dad and I thinkin' on it. That eases my mind on the driving as well, because thats usually how i drive when i'm not pretending my truck is faster than it really is, heh. -Sam.
__________________
1969 GMC C1500. long fleet. 307. 3 on the tree. 3.07 gears. Oliver green. Bent and bruised. Daily Driver. Quote:
http://67-72chevytrucks.com/vboard/s...d.php?t=242993 |
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05-19-2008, 02:25 AM | #6 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Bad shifting noises...
I agree, the syncros are probably getting worn... but, did you check the oil level?
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05-19-2008, 06:28 AM | #7 | |
FarmBoy.
Join Date: Feb 2005
Location: Rhinelander, WI
Posts: 1,103
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Re: Bad shifting noises...
I will be sure to check it tomorrow. I honestly can't remember if I filled it all the way up when I did the clutch or not. I know I filled it, but all the way...I'm uncertain. Will do!
Thanks for tips guys. any more ideas are always welcome, just in case I don't have to do a tranny swap. hah. -Sam.
__________________
1969 GMC C1500. long fleet. 307. 3 on the tree. 3.07 gears. Oliver green. Bent and bruised. Daily Driver. Quote:
http://67-72chevytrucks.com/vboard/s...d.php?t=242993 |
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05-20-2008, 04:05 AM | #8 | |
FarmBoy.
Join Date: Feb 2005
Location: Rhinelander, WI
Posts: 1,103
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Re: Bad shifting noises...
well. pulled the spare 3 speed. and that sucker is about half the length of the one in the truck. sooo. this could be a bit of an issue. Unless I take the driveshaft out of the truck as well, which would require a new carrier bearing, etc. a general freshening. Plus, I don't even know if that tranny is any good..let alone what kind it is, hah.
The plan for right now is to take it realllly easy, and hope she lasts for a while. cross your fingers guys...this could get interesting. -Sam.
__________________
1969 GMC C1500. long fleet. 307. 3 on the tree. 3.07 gears. Oliver green. Bent and bruised. Daily Driver. Quote:
http://67-72chevytrucks.com/vboard/s...d.php?t=242993 |
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