Clanking sound

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vgrn

Junior Member
Joined
Sep 17, 2021
Posts
5
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5
Location
NYC
First Name
vlad
Truck Year
1977
Truck Model
gmc k15
Engine Size
small block 350
Every time I put the shifter into reverse there is a pound clanking sound. Also while rolling at around 5mph and giving it some gas it sounds like the transmission or transfer case gets kicked back with a loud metal clanking sound. Any in-site as to what’s going on with the truck would be a great help
 

Snoots

Full Access Member
Joined
Jan 23, 2013
Posts
8,179
Reaction score
16,009
Location
Georgia
First Name
Roger
Truck Year
1973
Truck Model
Jimmy Sierra
Engine Size
350
Ring and pinion are toast, or you have a shot U-Joint.
 

73c20jim

Full Access Member
Joined
Jun 11, 2018
Posts
2,282
Reaction score
2,924
Location
Tombstone, AZ
First Name
Jim
Truck Year
1973, 1973
Truck Model
C20 2WD Custom Deluxe. C10 2WD Base Model
Engine Size
350 CID 195/260 HP Goodwrench crate, 400 CID 2bbl
Mine clanked in reverse also. Rebuilt transmission cured it.
 

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