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04-20-2011, 08:54 PM
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Registered User
Join Date: Mar 2007
Location: San Pedro River, SE Arizona
Posts: 735
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4wd front drive shaft - need help
1972 K5 Blazer, 350, 4 speed, NP205 TC. Started hearing a steady "bump" sound at slow speeds when in 4wd with hubs engaged. Seems like it is the front drive shaft because, although the two universals are tight, there is play at the joint in the driveshaft and it gives a slight clunk when I move the shaft up/down at the joint - the two parts are not mated firmly.
Never before noticed that the shaft is two-piece and, of course, never seen inside the joint. The shop manual does not show or describe the drive shaft. So, before I start taking things apart, need some wisdom from you experienced guys. Is that joint splined, and how is the connection made tight and without play? Is there a bearing in there, or? Does anybody have a pic of the inside setup or a parts blow-up showing what is going on inside there? All help will be appreciated. Thanks for reading.
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CCCC 67 Sting Ray Coupe 327 4sp; 68 K10 Suburban 327 4sp; 69 K20 Lifted 383 4sp; 69 C80 Fire Truck 478 V6 5sp/2sp; 69 C20 Longhorn 327 4sp; 70 C30 Wrecker 350 4sp; 70 C30 Flat Bed 350 4sp; 71 C20 LWB 350 4sp; 72 K5 Blazer 350 4sp; 72 C30 Flat Bed Gooseneck Hauler with sleeper 350/TH400; 72 C20 Longhorn 402 4sp; 52 Mack LTL Supercharged Cummins 5sp x 3sp; 01 Dodge 5.9 HO Cummins 6spd; 02 Safari Trek 2430 8.1 Vortec on Workhorse Chassis; 03 Silverado 2500 HD 4wd Duramax/Allison Moved but still in the family 70 C20 Custom Camper 350/TH350; 72 K5 Blazer CST Highlander 350/TH350 Recently sent to new homes 72 C30 MoHome 402 4sp; 72 K5 Blazer Conv 350 4sp; 75 GMC 6000 Aerial 350 w Allison; 72 GMC 3500 Utility 350 4sp; 70 GMC 3500, 350 4sp Last edited by CCCC; 04-23-2011 at 10:30 AM. |
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