The Green Industry's Resource Center

Old 10-18-2000, 12:23 AM
velzey velzey is offline
LawnSite Member
Join Date: Oct 2000
Posts: 6
Hello greeting's from the Pacific Northwest ,Ive got a 77 GMC Camper Special : I have a loud klunk when i shift into any gear . It has a turbo 350 in it and i took the front driveline off thinking it was a worn U-joint . But no . Ive checked the rear ring and pinion and there is very little play there !! So , this is where im stumped . Does the belt in the NP 203 strech ?? making this loud noise???
I can also hear it when im driving . let off the gas a little and it klunks , give it gas again and the same ...
Will it break if it is the belt and take out the whole transfer case ???

Well any input will be appriciated ....
Thanks , Tim
Reply With Quote
Old 10-18-2000, 01:25 AM
LawnSite Senior Member
Join Date: Aug 2000
Location: Columbus Ga
Posts: 519
automatic . i had the tourqe converter bolts work lose and made a u joint or r&p slack sound
Reply With Quote
Old 10-18-2000, 11:23 PM
velzey velzey is offline
LawnSite Member
Join Date: Oct 2000
Posts: 6
Well i checked the torque converter bolts and they are all tight !!!! Im going to put it on the rack this weekend and do some searchin...Thanks
Reply With Quote
Old 10-19-2000, 12:18 AM
bandit_36 bandit_36 is offline
LawnSite Member
Join Date: Oct 2000
Posts: 49
klunk noise

it's more than likely that it is play in your transfer case or loose splines on the rear drive shaft. You may want to pull the rear differential cover off while you have it up & check the teeth onthe ring gear & pinion.
Reply With Quote
Old 11-07-2000, 10:07 PM
mike reeh mike reeh is offline
LawnSite Member
Join Date: Oct 2000
Location: san diego
Posts: 229
no no no!!! Id bet money that its the front-axle ujoints.. put it in neutral, lock the hubs if you have em then turn the front driveshaft back and forth by hand and watch the axle ujoints very carefully..

My last truck was a '77 np203 truck and it did exactly what you described, very badly, and that was it.. luckily my current '77 np203 had the part time conversion installed in the t-case and the whole driveline is *tight*

good luck and keep us posted

mike reeh
Reply With Quote
Old 11-08-2000, 11:13 AM
LawnSite Senior Member
Join Date: Dec 1999
Location: northeast ,ohio
Posts: 555
another possibility is a cracked flywheel , they will usually make noise when torque is applied

i replaced one last year
Reply With Quote

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

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

Forum Jump

Layout Style:

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Grand View Media
All times are GMT -4. The time now is 12:14 AM.

Page generated in 0.08489 seconds with 9 queries