Drive shaft spacer question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

danadena1960 · 02-03-2004, 02:18 AM

Has anybody used a 1" drive shaft spacer? What is it used for? How about the 1" transfer case lowering kit? What is it used for?
If anybody has any input on these two subjects, please let me know.
Also, does anybody know if they make a longer peice for the rear drive shaft of a 77 K-20 (1 piece drive shaft, long bed) where the u-joint hooks to the rearend yoke, there is a slined female part (the piece the u-joint is attached to on the drive shaft) that slides up and down a male spline that is attached to the big tube of the drive shaft? Or do I need to just have the drive shaft lengthened?
Thanks,
Dana

**JIMs70GMC** · 02-03-2004, 06:50 AM

The 1" transfer case lowering kit, lowers the transfercase crossmember 1" and easing the rear driveshaft angle good for short wheel based vehicles, did it to my K5 when I installed a 4" lift. The not so good part is it increase the front driveshaft angle slightly by pointing the front TC output up thus increasing the angle, usually not a problem because the front driveshaft is longer than the rear and usually has a cv joint which can stand the angle better. The best thing to do would be to have a new rear driveshaft made with a cv joint at one end vice lowering the TC.
I would not recommend the driveshaft spacer, it changes the rotating mass of the driveshaft, for about $150 you should be able to get your driveshaft lengthen, best way to go.

02-03-2004, 02:18 AM	#1
danadena1960 Registered User Join Date: Aug 2003 Location: Stockbridge, GA (Suburbs of Atlanta) Posts: 126	Drive shaft spacer question Has anybody used a 1" drive shaft spacer? What is it used for? How about the 1" transfer case lowering kit? What is it used for? If anybody has any input on these two subjects, please let me know. Also, does anybody know if they make a longer peice for the rear drive shaft of a 77 K-20 (1 piece drive shaft, long bed) where the u-joint hooks to the rearend yoke, there is a slined female part (the piece the u-joint is attached to on the drive shaft) that slides up and down a male spline that is attached to the big tube of the drive shaft? Or do I need to just have the drive shaft lengthened? Thanks, Dana __________________ Dana 77 K-20 454 73 SS El Camino 454 68 SS Camaro 327 48 Chevy 216 755 John Deere

02-03-2004, 06:50 AM	#2
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	The 1" transfer case lowering kit, lowers the transfercase crossmember 1" and easing the rear driveshaft angle good for short wheel based vehicles, did it to my K5 when I installed a 4" lift. The not so good part is it increase the front driveshaft angle slightly by pointing the front TC output up thus increasing the angle, usually not a problem because the front driveshaft is longer than the rear and usually has a cv joint which can stand the angle better. The best thing to do would be to have a new rear driveshaft made with a cv joint at one end vice lowering the TC. I would not recommend the driveshaft spacer, it changes the rotating mass of the driveshaft, for about $150 you should be able to get your driveshaft lengthen, best way to go. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm



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