Bump at stop and acceleration?

[alcohenusa]

Interesting theory.

I have the same bump on stopping start, but like others here mine is more pronounced the warmer it is. Under 50-60 degrees F and the bump is usually gone. Hot summer days of 90-100 degrees have the bump the most pronounced. I don't understand how your suspension theory plays into the heat or cold affecting it? That's why I think it is the spline joint, with some expansion or contraction due to ambient temperature. I guess it's possible the same with this suspension, with regards to temperature?

I've had 250 or more pounds in the bed and it doesn't matter. In my case that's a rack, rooftop tent, cooler and a couple plastic bins of camping equipment. It didn't make a difference.

One thing that will be interesting for me, and I will post my observations here, is when I start towing in the warmer weather. So far my towing has all been in winter, near freezing temperatures. When I start towing at 60-70° and above this spring, it'll be interesting to see if I have the bump or not with the trailer.

If it is the leaf springs, I wonder if upgrading them to either the Tremor pack, or other aftermarket options, would fix things?

I believe this issue is the slip joint needing better lubrication. See this thread.

https://www.ranger5g.com/forum/threads/how-to-lubricate-your-driveshaft-slip-joint.16648/

Mine does this and it disappears in cooler weather as well. When the temps get higher I will be taking it back to the dealer as I am not going to do it myself. They blew me off the first time, but that was when the truck was new. I was hoping it would improve over time.

Sponsored

 

[JoeyG60]

Interesting theory.

I have the same bump on stopping start, but like others here mine is more pronounced the warmer it is. Under 50-60 degrees F and the bump is usually gone. Hot summer days of 90-100 degrees have the bump the most pronounced. I don't understand how your suspension theory plays into the heat or cold affecting it? That's why I think it is the spline joint, with some expansion or contraction due to ambient temperature. I guess it's possible the same with this suspension, with regards to temperature?

I've had 250 or more pounds in the bed and it doesn't matter. In my case that's a rack, rooftop tent, cooler and a couple plastic bins of camping equipment. It didn't make a difference.

One thing that will be interesting for me, and I will post my observations here, is when I start towing in the warmer weather. So far my towing has all been in winter, near freezing temperatures. When I start towing at 60-70° and above this spring, it'll be interesting to see if I have the bump or not with the trailer.

If it is the leaf springs, I wonder if upgrading them to either the Tremor pack, or other aftermarket options, would fix things?

Thanks

 

[JTDay]

This thread title should be prefaced by the word, SOLVED. If describing the issue accurately, this is the slip joint on the driveshaft lacking proper lubrication. You'll find many posts on the forums about lubing the splines. Try that since it's very easy to accomplish. I still have a new one-time-use tube of the Ford Teflon grease if anyone wants it. Free to a good home.

 

[Fitzmotor]

This thread title should be prefaced by the word, SOLVED. If describing the issue accurately, this is the slip joint on the driveshaft lacking proper lubrication. You'll find many posts on the forums about lubing the splines. Try that since it's very easy to accomplish. I still have a new one-time-use tube of the Ford Teflon grease if anyone wants it. Free to a good home.

Ha, I also have a only used once tube of the Teflon grease, it's from when I had my F150, so many Ford trucks have had this problem. I worked at Ford dealers from 82-01 it used to be easy to fix, then Ford stopped putting a zirk on the slip yoke, after that it was pull the shaft and lube it ONLY with the Motorcraft PTFE teflon grease, there was always a truck in for that, especially in the 90's.
My Ranger does it as well, so I have to eventually do something about it.

 

[alcohenusa]

Ha, I also have a only used once tube of the Teflon grease, it's from when I had my F150, so many Ford trucks have had this problem. I worked at Ford dealers from 82-01 it used to be easy to fix, then Ford stopped putting a zirk on the slip yoke, after that it was pull the shaft and lube it ONLY with the Motorcraft PTFE teflon grease, there was always a truck in for that, especially in the 90's.
My Ranger does it as well, so I have to eventually do something about it.

Finally got my Ranger in for oil change and a second attempt with the dealer to address this issue. This time they acknowledged it but had to order the boot kit. Of course, backordered for 2-3 weeks.

 

[navsnipe]

Amazing they have to order the boot kit. I did the slip yoke on my own and used two heavy duty zip ties to secure the boot. Works great. Dealer told me "couldn't replicate described problem". I would have been done with this truck but it seems like all the brands have the same crap service.

 

[Fitzmotor]

I think a lot of why the dealer tech's don't try harder to find warranty problems is warranty just does not pay well, in the 90's when Jack was running Ford he promised the stockholders a certain return, he achieved it by cutting the warranty times. (amongst other things)
A great example was trans overhaul on a 4x4 diesel, it went from 19-20 hours down to like 11-12, the tech's were crying, we were always doing a repair review with Ford to improve the times, most of the time it did get increased, but that process was a pain.
I know that was a really long time ago, but I doubt it's changed much, I had the tires balanced under warranty last week and it only paid .5 of an hour, the tech had to be losing money on that, find the truck in the lot, rack the truck, pull all 4 wheels, knock out the center caps, spin up, strip the old weights, clean to attach new weights, re-spin, adjust if needed and remount wheels, park it back in the lot and go flag it, he must have made minimum wage on the job.

 

[alcohenusa]

Finally got my Ranger in for oil change and a second attempt with the dealer to address this issue. This time they acknowledged it but had to order the boot kit. Of course, backordered for 2-3 weeks.

Boot kit arrived and was able to get the Ranger back to the dealer for this job. All good now!

 

[JoeyG60]

I know it has been a long time since I followed up here. Have you found a fix? Sadly, I have not tried the leaf/helper spring test.

 

[MountainGoat]

I get this lately, a bump/shift when I come to a complete stop. I already had the driveshaft bearing replaced and honestly I'm just leaving it because I'm tired of having to work on a truck I bought new with 28k on it.

 

[EJH]

Lubing the spline joint with CS Moly did the trick for me. I have been good for 7 months now.

The Ford white lube (comes in a single use package with the boot) did not work as well, or last long, for me.

It also helped to get all the old grease out of the joint. Someone here used brake cleaner. I used alcohol and a rag and q-tips to clean both ends of the spline first. Then used a very liberal amount of CS Moly.

My dealer would not fix this. They said it was fine and blamed the suspension hitting the bump stops.

 

[silverflash]

i have this issue as well as the vibes on acceleration. truck is getting a new driveshaft under warranty at dealer. there is a tsb that addresses the vibe from a stop and states for 4x4's, replace driveshaft. for rwd, add shims. i've already added shims a couple years ago at another dealer and i have a 4x4, so i am wondering how those shims will affect things once they replace the shaft. will they need to remove the shims?

 

[Muffin1]

I am having the same issue as others have mentioned here, with currently 22,000 miles on the odo.
I'm going to do the re lube process on the splines and see if that works before I go the dealer route.

 

[silverflash]

I am having the same issue as others have mentioned here, with currently 22,000 miles on the odo.
I'm going to do the re lube process on the splines and see if that works before I go the dealer route.

driveshaft is backordered. no idea when they will get the part and dealer is holding the truck stating if it is driven, it can cause catostrophic damage. they have had it 3 weeks so far.

 

[ccasanova22]

Mine does it only when you have to suddenly stop like you’re getting cut off by an idiot that ran a stop sign. It does it so infrequently I’ve decided to not worry about it for now.

Driveshaft may be the culprit but I almost feel like it’s something to do with the brakes.

Sponsored