AutosTalk Forums  

Transmission Knocking Sound?

4x4 Chevy/GMC Trucks 4x4 Chevy/GMC Trucks Discussions (alt.autos.4x4.chevy-trucks)


Discuss Transmission Knocking Sound? in the 4x4 Chevy/GMC Trucks forum.



Reply
 
Thread Tools Display Modes
  #1  
Old   
Forrest
 
Posts: n/a

Default Transmission Knocking Sound? - 06-30-2003 , 05:33 PM






I recently grabbed an 88 k1500 silverado $500 project. This guys wife
drove it across a parking lot and slammed it into a Dumpster (on
purpose), cuz he was talking with some Hotty's at a Wedding Reception,
she must be the jealous type. Anyway it crunched the front end in a
little. I replaced inner/fenders and radiator bracket, hood , grill
blah, blah blah. oh yeah, hit hard enough i had to straighten the
rightside frame out back about 1 foot. All square now though.

It has the 5.7 and the 700 4spd automatic with +- 120Kmiles on it.
Runs and drives good. Just started after driving on highway for 20 -
40 miles a knocking sound starts up only when in park or neutral. If
i pull her into reverse or a foward gear the sound goes away. Pretty
substancial knock too, I thought maybe a rod at first but since it
subsides when in gear I was thinking Flywheel Bolt? I came off the
highway pulled up to my buddies house, put it in park at idle speed
and all you can hear is , sha-bam sha-bam., sha-bam. Pull it back in
drive and nice and quiet.

Anyone seen or heard this b4?


-Forrest

Reply With Quote
  #2  
Old   
Gary Glaenzer
 
Posts: n/a

Default Re: Transmission Knocking Sound? - 06-30-2003 , 05:47 PM






if he did that much frame damage, I'd guess either:

cracked bell housing
cracked flywheel
loose converter bolts
loose bellhousing bolts

it's possible it has a broken crank, but that's a long shot


"Forrest" <hanginroundthe (AT) mosphere (DOT) com> wrote

Quote:
I recently grabbed an 88 k1500 silverado $500 project. This guys wife
drove it across a parking lot and slammed it into a Dumpster (on
purpose), cuz he was talking with some Hotty's at a Wedding Reception,
she must be the jealous type. Anyway it crunched the front end in a
little. I replaced inner/fenders and radiator bracket, hood , grill
blah, blah blah. oh yeah, hit hard enough i had to straighten the
rightside frame out back about 1 foot. All square now though.

It has the 5.7 and the 700 4spd automatic with +- 120Kmiles on it.
Runs and drives good. Just started after driving on highway for 20 -
40 miles a knocking sound starts up only when in park or neutral. If
i pull her into reverse or a foward gear the sound goes away. Pretty
substancial knock too, I thought maybe a rod at first but since it
subsides when in gear I was thinking Flywheel Bolt? I came off the
highway pulled up to my buddies house, put it in park at idle speed
and all you can hear is , sha-bam sha-bam., sha-bam. Pull it back in
drive and nice and quiet.

Anyone seen or heard this b4?


-Forrest



Reply With Quote
Reply




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off



Powered by vBulletin
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.