'75 rear end loose when accel/decelerate
Thread Starter
Cruising
Joined: Feb 2006
Posts: 11
Likes: 0
From: jax fl
'75 rear end loose when accel/decelerate
my rear end seems to pull very hard to the right when decelerating and same thing to the left when accelerating. almost undrivable over 60 mph. everything looks fine (not broken) under the entire car. can anybody give me an idea of what it could be?
Pro
Joined: Aug 2003
Posts: 530
Likes: 0
From: Victoria Texas
I worked on a car for a guy that did the same thing, I found the front T-arm bushings gone, there was only the bolt and outer shells left, no rubber at all.I thought it was going to turn in a circle the first time I drove it to see what he was talking about.
I replaced the bushings and it took care of the problem.
Mark G
I replaced the bushings and it took care of the problem.
Mark G
Instructor
Joined: Jan 2003
Posts: 237
Likes: 0
From: TAMPA FL
Originally Posted by RHD '68 L89
Check the shims in the trailing arms. Might be loose or missing. That would cause problems like yours.
dennis
Pro
Joined: Sep 2002
Posts: 620
Likes: 2
From: San Antonio TX
If the bushings are gone, you will get that "rear steer" feeling. They need to be replaced.
There are disagreements over poly vs. rubber, but I think most go for the poly. You can do the poly bushings in your garage in an evening if everything goes right.
(they usually don't), and then take it to a competent alignment shop the next day. (or, you can do it yourself if you feel up to it)
The rear bushings are not that horribly hard to replace, as long as you don't have a bunch of rusted parts back there. If your trailing arms have never been replaced, and you have rust issues, it can turn into a major PITA to get the trailing arm bolts and shock mounts out. There are lots of articles in the archives dealing with this.
If you are going to do this, it might be a good time to just go ahead and do the rest of your trailing arm rebuild "while you are at it".
There are disagreements over poly vs. rubber, but I think most go for the poly. You can do the poly bushings in your garage in an evening if everything goes right.
(they usually don't), and then take it to a competent alignment shop the next day. (or, you can do it yourself if you feel up to it)The rear bushings are not that horribly hard to replace, as long as you don't have a bunch of rusted parts back there. If your trailing arms have never been replaced, and you have rust issues, it can turn into a major PITA to get the trailing arm bolts and shock mounts out. There are lots of articles in the archives dealing with this.
If you are going to do this, it might be a good time to just go ahead and do the rest of your trailing arm rebuild "while you are at it".
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Melting Slicks
Joined: Dec 2000
Posts: 2,130
Likes: 1
From: mesa,az
you know what , i didn't see the other two post about this. I did see this one and learned something. so I'm glad he didn't search. i would not have gained anything from his questions, now i did. I really don't understand why the whole search thing bugs some people so much.
Melting Slicks
Joined: Nov 2003
Posts: 2,362
Likes: 1
From: San Antonio TX
Originally Posted by panchop
you know what , i didn't see the other two post about this. I did see this one and learned something. so I'm glad he didn't search. i would not have gained anything from his questions, now i did. I really don't understand why the whole search thing bugs some people so much.
.
Racer
Joined: Feb 2005
Posts: 301
Likes: 0
From: Little Italy MI
Originally Posted by SHAKERATTLEROLL
The search option is nice and will give some info. But sometimes when even the same question is asked there maybe even more and better information given on the same subject. Along with many new people and some old forum members that missed the older posts. So to me it is all Good .
.ditto
Safety Car
Joined: Feb 2006
Posts: 4,367
Likes: 59
From: FL
Originally Posted by panchop
you know what , i didn't see the other two post about this. I did see this one and learned something. so I'm glad he didn't search. i would not have gained anything from his questions, now i did. I really don't understand why the whole search thing bugs some people so much.
I know that there were two other threads on this same topic just a few days ago, both running at the same time. So it isn't like it was a month or so ago.
Still, many times the search can't find what you need, because the title is something strange or whatever. Like "rear gets loose" won't find "back end all over the place".
Glad you found this one and hope you can find the other ones for additional information.
Common things that can cause this problem:
1. Toe-in shims at front of trailing arms
2. Trailing arm bushings
3. Camber bracket bolts loose/missing
4. Camber rod bushings bad
5. Tire belts all scrambled (pull tire off car and check for out of round)
When you can repeat it in one direction like this, 1, 2, and 4 are most likely.
