Front Drive Shaft Universal Joint exploded (pics) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mpierce9 · 05-28-2014, 08:15 PM

I believe this is an NP203 transfer case. It's in a 1975 Blazer with full time 4x4 and auto locking hubs. Gear shifter only allows:

4 Low Loc
4 Low
Neutral
4 High
4 High Loc

I'm trying to figure out what I need to purchase to repair this. The rear section of my front drive shaft, what i believe is called the Double Cardan joint had one of the universal joints pretty much just get ripped to shreds recently. I removed the driveshaft as well as the double careen joint in order to make the truck drivable without anything beating around.

Outside of some surface abrasions the drive shaft appears to be in good condition. The front universal joint and linkage also appear to be in good condition. I believe (I may get these part names wrong) the ball stud yoke and one of the universal joints is in need of being replaced as well as possibly the Carden joint yoke. I want to make sure I get the right parts the first time. I'm hopeful my driveshaft does not need replacing.

Please feel free to correct any of my assumptions and provide any guidance. I have zero experience doing any of this. I also realize that I need to replace my auto hubs with manual locking hubs at some point in the future.

Double Carden joint still attached to the transfer case with the driveshaft removed. Easily seen in this and the next image is where the universal joint previously sat. The fragments still remain.

Close up of the Double Carden joint specifically the front facing portion of the ball stud yoke.

One last really close up of the ball stud yoke portion of the Double Cardan joint.

A wider shot of the Double Cardan joint not focusing on the yoke. You can see on the right end the universal joint which seems in good condition.

The remains of the universal joint that got beat to death.

Rear end of the driveshaft that connected to the Double Cardan joint and the destroyed universal joint.

Same thing, just a wider shot.

An overall picture of the entire mess of items.

05-28-2014, 08:15 PM	#1
mpierce9 Registered User Join Date: Nov 2013 Location: ATLANTA Posts: 223	Front Drive Shaft Universal Joint exploded (pics) I believe this is an NP203 transfer case. It's in a 1975 Blazer with full time 4x4 and auto locking hubs. Gear shifter only allows: 4 Low Loc 4 Low Neutral 4 High 4 High Loc I'm trying to figure out what I need to purchase to repair this. The rear section of my front drive shaft, what i believe is called the Double Cardan joint had one of the universal joints pretty much just get ripped to shreds recently. I removed the driveshaft as well as the double careen joint in order to make the truck drivable without anything beating around. Outside of some surface abrasions the drive shaft appears to be in good condition. The front universal joint and linkage also appear to be in good condition. I believe (I may get these part names wrong) the ball stud yoke and one of the universal joints is in need of being replaced as well as possibly the Carden joint yoke. I want to make sure I get the right parts the first time. I'm hopeful my driveshaft does not need replacing. Please feel free to correct any of my assumptions and provide any guidance. I have zero experience doing any of this. I also realize that I need to replace my auto hubs with manual locking hubs at some point in the future. Double Carden joint still attached to the transfer case with the driveshaft removed. Easily seen in this and the next image is where the universal joint previously sat. The fragments still remain. Close up of the Double Carden joint specifically the front facing portion of the ball stud yoke. One last really close up of the ball stud yoke portion of the Double Cardan joint. A wider shot of the Double Cardan joint not focusing on the yoke. You can see on the right end the universal joint which seems in good condition. The remains of the universal joint that got beat to death. Rear end of the driveshaft that connected to the Double Cardan joint and the destroyed universal joint. Same thing, just a wider shot. An overall picture of the entire mess of items.



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