Need Advice Kingpin? or Other Problem
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Joined: Mar 2009
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Need Advice Kingpin? or Other Problem
I am novice mechanic, i guess really a wannabe.. I have an 81 F150 4X4, w/ 4" body lift and big tires (maybe 33's). When I put truck in reverse the front wheels tilt in at the top severely. I was told it was the king pins and they needed to be replaced. So I have taken the front suspension apart, Shocks, Coils Springs, Disk Calipers, etc... (i still cant get the wheel bearing out but thats another post). I am looking throught the haynes manual and the diagrams on the LMC trucks website for the king pins. I see them on the two wheel drive but I do not see any king pins on the 4 wheel drive models. Also there is a lot of "play" "sway" in the suspension when i drive the truck.
So my questions are:
Are there any king pins on the 4wheel drive model? if so where are they located?
If not what would cause the wheels to severly tilt inwards at the top when the truck is in reverse.
I can send pictures if need be...
So my questions are:
Are there any king pins on the 4wheel drive model? if so where are they located?
If not what would cause the wheels to severly tilt inwards at the top when the truck is in reverse.
I can send pictures if need be...
Moderator
Joined: Jan 2001
Posts: 56,984
Likes: 2,738
From: Virginia
4wd does not have king pins, they have balljoints. There have been several posts on here recently about this problem, and some of them found their frames cracked. An alignment problem or loose tie rod could cause it too.
Check around the large front crossmember, and also the brackets where the center of the axle is attached for cracks.
4" inch body lift doesn't sound too safe either.
Check around the large front crossmember, and also the brackets where the center of the axle is attached for cracks.
4" inch body lift doesn't sound too safe either.
Cargo Master
Joined: Oct 2005
Posts: 2,298
Likes: 26
From: NJ
Probably ball joints. Put front in the air and grab top and bottom of tire, rocking it up and down. If bad ball joints you will feel play and can watch the ball joint move. Repeat side to side to check tie rods. Also could be wheel bearings, if you watch each part when moving you will see what parts are bad. Could also be axle pivot arm bushings or your radius arm bushings.
Best solution is to get rid of the body lift, do a suspension lift and bolt in a '78-'79 Dana 44. No more TTB problems. When the Dana 50 TTB on my F-250 started wearing out parts I just built a Dana 60 and swapped that in. My thought on the matter is there's no sense wasting time and money on a TTB, they were a poor design right from the start, not very strong and prone to wear, particularly ball joints. Not to mention a royal pain to align, especilaly when lifted.
Best solution is to get rid of the body lift, do a suspension lift and bolt in a '78-'79 Dana 44. No more TTB problems. When the Dana 50 TTB on my F-250 started wearing out parts I just built a Dana 60 and swapped that in. My thought on the matter is there's no sense wasting time and money on a TTB, they were a poor design right from the start, not very strong and prone to wear, particularly ball joints. Not to mention a royal pain to align, especilaly when lifted.
