F150 clunck

[Bezzola]

I borrow the father inlaws 2013 F150 and ask him about the clunck in the rear when starting out from a start he says been there for awhile
I haven’t had a chance to look at it maybe today when empty it cluncks when weight in the box it doesn’t do it. Anyone have this issue

 

[papajake]

low on oil or bad ujoint should be checked soon before something happens at 100klms an hour

 

[drew562]

I borrow the father inlaws 2013 F150 and ask him about the clunck in the rear when starting out from a start he says been there for awhile
I haven’t had a chance to look at it maybe today when empty it cluncks when weight in the box it doesn’t do it. Anyone have this issue

My 09 F150 I drive for Painting does that. If I takeoff fast from the light sometimes clunk. Sounds like it’s missing a transmission or motor mount lol. Cause it’s a work truck. I just keep driving it till she dies. Curious to hear if anyone knows what it is ?

 

[JMCX]

This is a very common issue for 4wd rear leafspring pickups. Pull the driveshaft and grease the yoke slip-spiles.

I describe it as feeling like something is shifting in the bed on accelerating from a stop. When braking the spline extends and binds up lightly. On application of power the spline needs to take up forward rotation of the pinion and it releases with a clunk.

 

[hbar218]

This is a very common issue for 4wd rear leafspring pickups. Pull the driveshaft and grease the yoke slip-spiles.

I describe it as feeling like something is shifting in the bed on accelerating from a stop. When braking the spline extends and binds up lightly. On application of power the spline needs to take up forward rotation of the pinion and it releases with a clunk.

I had this issue and cleaning the splines and re greasing solved it.

 

[ZRrrr]

One of 350's had the spline clunk. Cleaning and lubing fixed it. I even bought the fancy Ford PTFE lube.

 

[Bezzola]

I was under it yesterday and didn’t see a slip joint
It looks to me like ujoint one piece shaft and ijoint

 

[lilduke]

There is some slop in the drive line some where. Probably need to put er up on a lift to find out what exactly it is

 

[Lem Lamb]

Ford junk,,, I own 1...

A clunk of junk it is...

Lol

 

[JMCX]

I was under it yesterday and didn’t see a slip joint
It looks to me like ujoint one piece shaft and ijoint

In your case the yoke at the transmission end is the slip-spline.

 

[hbar218]

I used a file to smooth up the splines a bit, cleaned it and then used a synthetic grease. I had to Jack up back end , put it in neutral and rotate driveshaft to get at all the flange bolts