Hi guys, Getting back to the '49 F-47 build after a crazy summer. I finally have found all the components to complete the driveshaft and am ready to weld the spring perches but I want to confirm I have everything dialed in correctly before I fire up the welder. The truck has an AOD from an '87 F-150 2WD, finally found the correct slip yoke, and an '88 Explorer rear end and the driveshaft from a '96 F-350. All components use standard 1330 U-joints and I didn't have to adjust the driveshaft length, I think it is perfect. Would appreciate hearing that I have the correct distance from the slip yoke to the tail housing and reasonable angles. Angles are 3* UP on the trans, 2* UP on the DS and 3* UP on the diff. The Explorer has the horizontal offset pinion as well. Thanks!
If you are 3 degrees up on the trans, you should be 3 degrees down on the diff. You want the center lines of the engine crankshaft / transmission to be parallel with the pinion centerline of the diff. You want the slip yoke to be 3/4" to 1" pulled out from bottoming out in the transmission.
You need the trans pointing down and the diff pointing up. equal degrees is best 2* - 3* is pretty standard you want the drive shaft in almost a straight line from trans to diff with no excessive angles
My '53 Studebaker has your "Absolutely Not" Set up and has been vibration free for over 10,000 miles. And, a straight line is reputed to not allow proper U-joint lubrication.
Hi Guys, Thanks for the help. I think I must have misstated what I meant, I was following the terminology used on the Spicer web site. I do have the tranny and pinion angles the same, ie parallel, like in image 2 above. The tranny is pointing down 3* towards the rear end, and the diff is pointing up 3* towards the tranny, the DS sits at 2* which gives me a 1* angle on the U-joints, not counting the horizontal pinion offset. The slip yoke will bottom out about .25" away from the flange hitting the tail housing, which means I have about 1.125" to a hard stop and about 3/4" before it hits the dust shield. I had a neighbor jump up and down on the rear of the truck and it moves very little, maybe 1/4", if that, I think I am safe. Let me know if I have it right pls and thx, I'm planning to weld the perches tomorrow and move on to the next 1 of 245 things to do. Thanks guys! Cheers
I have read a tutorial on drive lines components that stated the centerlines need to be parallel but offset to ensure equal ware in the cup needle bearings.