Well today I install my new custom made dynotech driveshaft, but had to do a little extra to get there. First I had to remove the old shaft from the old pinion yoke, then remove the old pinion yoke which took only a couple minutes. Then I removed the old pinion oil seal. Then I compared the old oil seal to the new oil seal, the new oil seals flange was to wide, so I sent my mother out to pick me up 2 quarts of valvoline durablen 85W140 gear oil and a different seal, the seal she brought back wasn't the correct one either (not her fault, I gave her wrong part number), so then I had to go back to the autostore to return the wrong seal and buy back the seal I had her return, then I took the new seal and used an angle grinder and some hand files to shrink the circumference so the oil slinger on the new pinion yoke wouldn't come in contact with the flange of the oil seal. So then I installed the new oil seal with some permatex RTV black then installed the new pinion yoke, a victory performance forged 1350 pinion yoke made for the chrysler 8 3/4 axle (fits 9 1/4 as well). then got that all installed and torqued down then put the axle on jack stands, took the wheels and drums off, checked preload by feeling by hand. then put wheels and drums back on, lowered vehicle. then removed old driveshaft from the extension housing. then removed the transmission extension housing yoke seal and installed a new one. the old seal was actually only 6 months old but I decided to replace it for the sake of being thorough and because my old slip yoke had a dent in it which might of damaged the seal.
then the fedex man arrived with the new driveshaft, i open the box took the shaft out, looked at the invoice inspected everything took measurements to make sure it fits, then took the dynotech stickers i asked for and put a sticker on my bumped.
then i put the new driveshaft in which is perfect fit, perfect fit. the shaft is 4" X .083" X 60.93" DOM steel 4140 it weighs 26 lbs came complete with forged solid body spicer 1350 u-joints, forged spicer tube yokes, cast spicer slip yoke for the 727 same as the dodge viper yoke, and the driveshaft as an assembly was balanced between 5000-8000 RPM. then installed the drive shaft and tightened the yoke u-bolts down 20 ft-lbs guess by hand. then filled the axle with valvoline gear oil and took it for a test drive down the street. vibrations are all gone and the ride feels so much better.
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