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Im new to the forum but im trying find some answers or ideas maybe someone else has had the same issue. I purchased my excursion a year ago and it appeared that it just had bad front bearings and that is where the journey begun. Since then i have rebuild the entire front end, front bearings are precision, warn manual hubs, the tire rods are ford, balljoints are duralast gold, new bds 6" lift kit with rear leafs, pmf traction bars and rear 1.5" blocks, driver shaft is a tom woods double cardon and have the rear pinion angle set to 0 degrees, just had the transmission built at BTS 2 weeks ago. New wheel and tires from custom offsets.
As of today i still have a sharp vibration that you can feel in the seat and in the steering wheel that it at its worst at from 68-72 then by 75 is less sharp but still there. The only original parts left on the truck are the long block, transfer case and the rear axle
any ideas would be a huge help. thanks!
Im new to the forum but im trying find some answers or ideas maybe someone else has had the same issue. I purchased my excursion a year ago and it appeared that it just had bad front bearings and that is where the journey begun. Since then i have rebuild the entire front end, front bearings are precision, warn manual hubs, the tire rods are ford, balljoints are duralast gold, new bds 6" lift kit with rear leafs, pmf traction bars and rear 1.5" blocks, driver shaft is a tom woods double cardon and have the rear pinion angle set to 0 degrees, just had the transmission built at BTS 2 weeks ago. New wheel and tires from custom offsets.
As of today i still have a sharp vibration that you can feel in the seat and in the steering wheel that it at its worst at from 68-72 then by 75 is less sharp but still there. The only original parts left on the truck are the long block, transfer case and the rear axle
any ideas would be a huge help. thanks!
Did you not ask Bryan what he thought it might be?
If it was me I start with making sure the transmission mount isn't lose and the cross member too. I'd even loosen them up and see if there is any preloading. Then check the drive shaft slip and u-joints. Did they loosen the engine mounts? Look there too. misaligned drive shat angles and body chassis mounts. Having some tertiary experience with finding vibrations on rotating equipment, 95% of vibrations are rotational issues. Every rotating device has what is called criticals. When the rotating equipment has a harmonic imbalance. at certain rotational speeds, you get a vibration. Most of the time it's not noticeable,. as you accelerate through the harmonics. Sometimes it's in a sweet spot at higher speeds and is very noticeable.
With that said... if you didn't have the vibration before the transmission work well then..... . just sayin'
If it was me I start with making sure the transmission mount isn't lose and the cross member too. I'd even loosen them up and see if there is any preloading. Then check the drive shaft slip and u-joints. Did they loosen the engine mounts? Look there too. misaligned drive shat angles and body chassis mounts. Having some tertiary experience with finding vibrations on rotating equipment, 95% of vibrations are rotational issues. Every rotating device has what is called criticals. When the rotating equipment has a harmonic imbalance. at certain rotational speeds, you get a vibration. Most of the time it's not noticeable,. as you accelerate through the harmonics. Sometimes it's in a sweet spot at higher speeds and is very noticeable.
With that said... if you didn't have the vibration before the transmission work well then..... . just sayin'
I am thinking that he implied he has had this issue ever since he bought the truck and has tried all of these repairs, improvements, etc, trying to chase down the vibration.
In my experience, when a vibe is noticeable at a certain speed band (usually in the 60-70 mph), it is due to out of balance tires/wheels. Especially when its felt in the steering wheel. With those (awesome) aggressive tires, might take a few trips to the tire shop to get them balanced correctly. That being said ... Toyo's are usually high quality, but still...
Another possibility that I just went through with 2 weeks ago was a slightly seized caliper that was riding the rotor just enough to cause vibes in the steering wheel only at higher speed.
In my experience, when a vibe is noticeable at a certain speed band (usually in the 60-70 mph), it is due to out of balance tires/wheels. Especially when its felt in the steering wheel. With those (awesome) aggressive tires, might take a few trips to the tire shop to get them balanced correctly. That being said ... Toyo's are usually high quality, but still...
Another possibility that I just went through with 2 weeks ago was a slightly seized caliper that was riding the rotor just enough to cause vibes in the steering wheel only at higher speed.
That's why I use Centramatic Balancers. https://www.centramatic.com/balancers.rhtml I still have the tires balanced, but only once. Actually... I could get by with just a static balance.
I didn't read the whole thread, but I'd jack it up and put it on jack stands, and run it in 2x4 and 4x4 and see if anything stands out that way. Could be a bent axle, but without riding in it, it's hard to communicate exactly what is happening. I'd even go as far as swapping the wheels and tires (looks like you may have some candidates to take from) that are stockish in size and see how that effects the vibration, if at all.
I just fought with that. Ended up being the rear ujoint rear driveshaft. Had it replaced it twice by a driveline shop first time with a new driveshaft they built and second time they replaced it due to bad joint. Vibration got better but never went away completely. Just replaced it again a year later and all smooth again. couldnt tell it was bad while it was in place only when I removed the driveshaft. Good luck!
In my experience, when a vibe is noticeable at a certain speed band (usually in the 60-70 mph), it is due to out of balance tires/wheels. Especially when its felt in the steering wheel. With those (awesome) aggressive tires, might take a few trips to the tire shop to get them balanced correctly. That being said ... Toyo's are usually high quality, but still...
Another possibility that I just went through with 2 weeks ago was a slightly seized caliper that was riding the rotor just enough to cause vibes in the steering wheel only at higher speed.
I just had the tire re balanced and road forced at discount and all the tires are sub 12lb on road force and take less than 2oz of weight the issue has been around for since I bought the truck and it was stock. Only thing I have let changed in the truck is anything on the rear axle 🤦♂️ and the harmonic noise in the cabin is still there
Did you not ask Bryan what he thought it might be?
so the ironic part is it didn’t do it while we just drove slow in the truck and I know it sounds weird but it starts once the driveline warms up which makes me think it’s in the rear axle
If it was me I start with making sure the transmission mount isn't lose and the cross member too. I'd even loosen them up and see if there is any preloading. Then check the drive shaft slip and u-joints. Did they loosen the engine mounts? Look there too. misaligned drive shat angles and body chassis mounts. Having some tertiary experience with finding vibrations on rotating equipment, 95% of vibrations are rotational issues. Every rotating device has what is called criticals. When the rotating equipment has a harmonic imbalance. at certain rotational speeds, you get a vibration. Most of the time it's not noticeable,. as you accelerate through the harmonics. Sometimes it's in a sweet spot at higher speeds and is very noticeable.
With that said... if you didn't have the vibration before the transmission work well then..... . just sayin'
everything is tight and trans mount is new and tight
That's why I use Centramatic Balancers. https://www.centramatic.com/balancers.rhtml I still have the tires balanced, but only once. Actually... I could get by with just a static balance.
Very interesting. Ive never heard of these before. Did you have any vibrations prior to installing these balancers? Im getting me a set either way. Before I start replacing every ball joint, u-joints, check pivots, etc.. Id like to see what changes after i install a set of these. Thanks.
