Driveline Angles

hey what's up guys it's Chris I figured I'd give you a little uh video I wouldn't know if I'd call this tutorial or just instructional or what kind of video I'd call it but I'm going to walk you through some of the steps on doing some drive line angle alignment um I've actually gotten a few questions Lately from some folks on vibrations while they're driving that only occur at certain speeds and up and are usually due to improper angles on the drive shaft so I'm going to try and walk you through at least a setup on a single or a onepiece drive shaft setup uh it's pretty simple and there's some apps out there that can help you guys through the process uh so but I'm going to show you here since I've got C10 CJ sitting at a bare chassis right now I'm going to walk you through that I don't have it at right height you will need to do this at right height but I do have it sitting on the suspension uh so we'll just go ahead and show you there there's just three simple measurements you need to make and then uh you can plug them into a host of available online calculators and get your drive line angles General guidance is the angles that you get calculated should be between. 5° and 2° you don't want any more than 2° that's when you start getting vibration and you don't want any less than 0.5° that's when you start getting brelling on the bearings that are actually in the ujoint cup so stick in that at 0.5 to 2 Dee range and you should be good to go and shouldn't have any vibrations on the driv tram so with that let's get to it okay so the first measurement that we're going to take is going to be the engine transmission angle and we're going to use the crank pulley to do that so you have a nice New pulley or you at least have a straight pulley that doesn't Lobel uh the face of this pulley should be pretty flat and perpendic ular to the crankshaft line so what I've got here is I've just got a standard little angle finder that you can buy from the big box stores on Depot or I bought mine from the local uh Rancher Supply um and then I just got a couple of pieces of angle iron here that I welded together to make this little fixture that comes in pretty handy for doing this type of measurement so all I'm going to do and the reason why this is Handy is because I'm just going to set this on the pulley like this and I'm going to wait for that thing to get a stabilized reading and then jot it down so in this case I've got 3.5 de so we'll just go ahead and write that down and then we'll move on to the next angle all right so the next angle that we measure is the drive shaft itself um you can either just set your angle finder on the drive shaft uh let it stabilize or you can use the the square uh either way it'll work as long as you get it on the drive shaft and it's sitting nice and square and perpendicular to the drive shaft so then we just jot down that angle which in this case is 1.6 de and that'll be our second measurement angle okay so the third angle is the angle of the pinion and there's a couple of different ways to measure this um I've got the drive shaft installed and I've got a nice big fat beefy 1350 U joint so I've got this big old flat surface up here on the top so what I can do is I can measure that if you don't have a nice surface like this you might have to take the drive shaft off and use the face of the yolk to get a good measurement that's where this guy comes in handy cuz then you can just set that up against the the yolk like that and then get a measurement so in this case here I'm just going to set right on there like that make sure that you've got the angle finder still uh in line with the drive line don't have it like this or cockeye or something like that you do want to have the angle finder in line with the drive line uh give that a little bit to stabilize and then we jot down our third measurement which is 2.7 de and then we can plug those into an online calculator and find out what our drive line angles are so let's go ahead and do that all right hey guys so we're now inside and we're we're on the computer and we're using this uh operating angle calculator that Spicer is providing um these guys make U-joints and other Drive Link Parts um they're actually really good U-joints this is what I've got in the truck right now is Spicer 1350 U joint so uh so this calculator is really nice um the links right up here in the adders bar all also include this in the description down below the video here um if you can't remember exactly what everything you need you can come to this web page and click on this little I right here and it's actually going to give you a lot of information on how to take these measurements so and they've they've got guidelines and everything in here as well um so there there's a lot of information right here even though it doesn't look like much it's a lot of pertinent information um so we're just going to go ahead and minimize that and show you the actual calculator this actual calculator is really nice because you can change the number of shafts and so you can go from one Shaft or the other common uh setup that guys run is they run two shafts and you can see that it has a coupling shaft in here now so this would be like first drive shaft and then you'd have coupling bearing between the first drive shaft and the second drive shaft and then finally your your pinion and if you kind of forget what all this stuff means you can click this little show diagrams feature right here and it brings up these diagrams and shows you exactly what you're talking about now one of the deficiencies I found using this thing in Chrome is that when you do that there's no way to scroll this little tool in the window so unfortunately the bottom stuff gets hidden on me I have no way to see it so um I'll just tie those and then I'm going to go back to one shaft so what we measured out in the on the C10 was we measured 3.5 de on the engine and that was down so we're going to click down and then we measured 1.6 on the drive shaft and that was also down and then we measured 2.7 but we called it up but they're referring to a slope here so even though we called it 2.7 on the opinion up uh it's actually down in their calculator so their their down angle if you go back up to the the information here refers to the slope uh from the front of the vehicle to the back of the vehicle so when you look at the pinion the pinion is actually sloping down from the front vehicle to the back vehicle even though we call it pinion up it's actually sloping down so when you do that and calculate results you see that even not at R height I'm still within 2° on the angles that we're calculating um and these are the important angles that matter right here is getting these angles to in that5 to 2° range ideally .5 to 1.5° range um so it's really helpful just to to make sure you got everything inspected because if these numbers are out of spec you're you're probably going to get vibrations in the drivetrain it's going to be a function of the speed so you're not going to notice it it lower speeds and then all of a sudden you'll get to a certain speed like 45 M hour and you'll start getting a vibration and the vibration May persist past 45 M hour or it may only last for a few miles an hour just depends on a lot of things to do with the vehicle and you know if there's stuff in the vehicle that can damp the vibrations out or not so um but the easiest thing to do is just to get these angles uh in Spec and then the other thing to not is this is only the vertical angles you you can also have a compound angle as a result of having hor Al offsets between like the tail shaft and the pinion um there's not much you can do about that so unfortunately you know you you really don't want your engine to be sitting at an angle and if you've offset your pinion that results in that offset angle then you're kind of stuck so the best thing you can do is to get these angles as small as you can so like you know try to shoot for that 05 uh that just helps the com compound angle be as small as it can that's pretty much all you have is the adjustability in the vertical Direction so um but with that I mean it's it's pretty simple you plug the numbers in the calculator you get the calculated angles you see that they're less than two greater than 0.5 and you're good if these are greater than that um you just have to think about it and decide if you if you want to try that or not I mean there's there's nothing set in stone that says you have to do it just you road test the vehicle and see how it drives if you're outside of that recommended range um you probably will get some accelerated ujoint bearing wear if you are significantly above 2° that's one thing to consider uh in addition to vibration but all right so with that we'll uh we'll wrap it up okay and some some brief final thoughts um just keep in mind you do need to have the vehicle level during that whole process and you do want to have it at R height so you can't crawl under the vehicle while it's at R height um you can jack it up but make sure that you keep the vehicle sitting on the suspension don't put jack stands on the frame because then your suspension will droop and you're not going to get the readings that you need to get CU drive shaft spends most of its time at right height so those are the angles that you want to actually measure and the other option is you could use cribbing like you see a lot of guys do uh they'll have the car sitting up on these 2x4 looking stands that's just a a generalized rigging term cribbing that's used to raise heavy objects up so you just stack the car up on those get it high enough to where you can get under it and take the measurements so with that hope that can help you guys out and get your drive line in the right angles and so you have a vibration free driving vehicle cuz otherwise it will not be comfortable all right with that talk to you guys later [Music] [Music] 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Channel: C10CJ

Views: 195,476

Keywords: c10, driveline angles, c10cj, u-joint, driveshaft

Id: 7MEbHcEMaCk

Length: 11min 25sec (685 seconds)

Published: Wed May 17 2017