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Hello! If you notice on the chart, there's a column for "Ford driveshaft code." (Are they stamped on the shaft???)
I have searched but haven't been able to find a translation of these codes. I am having driveshaft issues and want to know exactly what I need to replace it with. My suspicion is the "intermediate shaft," the yoke, or both. I'm pretty sure my rear section is ok. So if anyone could point me to a place where I could access these "codes" I'd very much appreciate it!
Leave it to the driveline shop, that's their specialty. Sometimes you have to pay the piper. I'm nuts and bolts type. Stuff like axels and transmissions I leave to the experts. Luckily, I still have a few.
I concur with the above. The shops all go off of specs. They usually don’t care what it’s even off of. Considering the amount of mileage that thing has likely seen, if one part is worn, the rest aren’t far behind.
Thanks for the replies! My issue is my front (intermediate/coupling) shaft and my slip yoke is "one tooth off" of being in phase. The rear section seems to be okay. (The ends sitt flat on the work bench.) So, I'm trying to diagnose the issue: either the yoke is twisted or there is a problem with the shaft coming off of the tranny. I hear what you're saying about the pros. My problem is I'm from a small town and will have to go to the "big city." for driveline service. If the driveshaft is "unbalanceable" then the driveline shop will have the same problem I'm having??? I'd like to be able to provide them with all the pertinent information. Thanks again!
Was that your discussion from last month?
The same thing came up recently and I thought it was determined that if there wasn’t an actual driving problem, such as vibration or noise, then to just leave it because apparently that’s how they were made.
I can see how with more than two shafts, leaving one slightly out of phase could actually be used to reduce harmonics. Rather than actually being a problem.
But I don’t know that for a fact. Just a WAG.
The twisting aspect you mentioned is a good point, but you’d be able to see that. And it’s also a fairly unusual occurrence in most trucks.
Especially if it’s not enough to visually determine.
Trust me. I'm definitely a "if it ain't broke, don't fix it" kind of guy. I have a whine/howl/vibration at higher speeds (55+) in 4th gear. As far as visual inspection, "one tooth off" because of a twist in the yoke or the shaft that goes into the yoke might be difficult to see. I have no problem deferring to driveshaft pros, but I do like to understand what the problems and solutions are even if they're beyond my abilities to repair myself.
Thanks for the replies! My issue is my front (intermediate/coupling) shaft and my slip yoke is "one tooth off" of being in phase. The rear section seems to be okay. (The ends sitt flat on the work bench.) So, I'm trying to diagnose the issue: either the yoke is twisted or there is a problem with the shaft coming off of the tranny. I hear what you're saying about the pros. My problem is I'm from a small town and will have to go to the "big city." for driveline service. If the driveshaft is "unbalanceable" then the driveline shop will have the same problem I'm having??? I'd like to be able to provide them with all the pertinent information. Thanks again!
Have you tried flipping the yoke +/-180°? It may be that it appears to be a tooth off because it’s installed upside down. Being off could be an indicator that it’s not install correctly. During some past maintenance it may have inadvertently been flipped.
Good question and yes I have done the 180-degree test. It's "one tooth off" regardless. When I got the pickup, it was the driveshaft was 90 degrees out of phase and shook horribly at 20-30 mph. Now I have it as close as I can and only shakes about 60+ mph. Any leads on the driveshaft codes?
I’d sure like to see some reference in print about this. It seems intuitively wrong to have that offset, but if it’s there to reduce harmonics I think it would be mentioned somewhere.
Good question and yes I have done the 180-degree test. It's "one tooth off" regardless. When I got the pickup, it was the driveshaft was 90 degrees out of phase and shook horribly at 20-30 mph. Now I have it as close as I can and only shakes about 60+ mph. Any leads on the driveshaft codes?
So, how snug is the rubber holding the center support bearing and is the bearing smooth in it's operation?
I had a slight issue, my bearing was OK but the rubber was a little soft. A shim made of steel between the retaining strap holding the rubber and the base snugged up the rubber, fixed my issue. I lowered my bearing with mount while shimming it so I could "spin" the bearing to check for smoothness, mine was fine.
At highway speeds of 50-60 mph, the shaft is turning a couple, maybe three thousand rpm depending on gear ratios. At some point, if the rubber is getting old, maybe soft, the loose rubber will let it start swinging in rotation, like a jump rope. The shim I made spans the bolt holes but where the rubber is, it's thicker by 1/8" and the rubber is snugger now. Grab the shaft at the bearing and shake it if you can.
Hanger bearing marked "1992" was replaced earlier this summer. I'm bringing my driveshaft in to be balanced this week. If the "one tooth off" is by factory design, then the 2-piece drive shaft should be "balanceable." If not, I'm hoping the pro's at the driveline shop will be able to tell me exactly what the problem is. Any links to driveshaft codes? Thanks guys. I'll keep you posted.
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