UMI rear control arm brace dosen't fit - Chevelle Tech
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post #1 of 62 (permalink) Old Oct 2nd, 19, 6:34 PM Thread Starter
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Troy
 
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UMI rear control arm brace dosen't fit

Anyone else have this issue. They simply don't fit properly.

I sent an email to their tech line and they said this was common and I should just "get them started and tighten them into place".

I'm not a bigger hammer kind of guy, so I'll cut them and reweld back in place at the proper angle.



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post #2 of 62 (permalink) Old Oct 2nd, 19, 6:48 PM
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Re: UMI rear control arm brace dosen't fit

Troy -

Is there not enough flex in the bushing to allow you to push it on to the bolt? Doesn't look like you're too far off.

jim
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post #3 of 62 (permalink) Old Oct 2nd, 19, 7:02 PM Thread Starter
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Re: UMI rear control arm brace dosen't fit

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Originally Posted by Jim's69Ragtop View Post
Troy -



Is there not enough flex in the bushing to allow you to push it on to the bolt? Doesn't look like you're too far off.



jim
It's off by two inches.

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post #4 of 62 (permalink) Old Oct 2nd, 19, 7:47 PM
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Re: UMI rear control arm brace dosen't fit

Quote:
Originally Posted by senna View Post
Anyone else have this issue. They simply don't fit properly.

I sent an email to their tech line and they said this was common and I should just "get them started and tighten them into place".

I'm not a bigger hammer kind of guy, so I'll cut them and reweld back in place at the proper angle.

Sent from my SM-G965U using Tapatalk
Before you do that - I just installed those exact braces on my rear end. They fit exactly like you had them shown there, and I fussed and fussed over it.

I put them on and off about 20 different times, and rotated them this way and that, and then suddenly, they lined up. I don't know how or why but getting it at just the right angle caused them to go on.

From the picture you are showing, I can't see where the angle/bend is that runs along the floor (because you are looking straight down.)

I actually put mine on the upper LCA bolt first, then fussed with the lower bolt until it suddenly *poof* lined up.
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post #5 of 62 (permalink) Old Oct 2nd, 19, 7:55 PM
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Re: UMI rear control arm brace dosen't fit

Quote:
Originally Posted by Jim's69Ragtop View Post
Troy -

Is there not enough flex in the bushing to allow you to push it on to the bolt? Doesn't look like you're too far off.

jim
It really has nothing to do with the bushing as the bolt that goes through the frame, rigid spacer in the bushing and forward lower control arm bracket is in a fixed orientation.
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post #6 of 62 (permalink) Old Oct 2nd, 19, 8:49 PM Thread Starter
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Re: UMI rear control arm brace dosen't fit

After messing with them a bit more, I got them to where I could possibly use a mallet and get them on and just tighten them up.

But, I can't live with that. I should be able to install the the upper bolt and have lower boss line up and the bolt should just slide through. No forcing or influencing should be needed.

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post #7 of 62 (permalink) Old Oct 2nd, 19, 8:54 PM
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Re: UMI rear control arm brace dosen't fit

Agreed. I put the top on with the bolt loose, then had to lengthen the brace, it and it caused the lower to come into alignment with the lower hole, then slid the bolt through. They were off about 1/8" still but I just tightened them down.

Quote:
Originally Posted by senna View Post
After messing with them a bit more, I got them to where I could possibly use a mallet and get them on and just tighten them up.

But, I can't live with that. I should be able to install the the upper bolt and have lower boss line up and the bolt should just slide through. No forcing or influencing should be needed.

1972 Chevelle, 454, 200-4r non-lockup, 12 bolt 3.73
1981 Camaro Z28, 355, TH350, 3.73
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post #8 of 62 (permalink) Old Oct 2nd, 19, 8:57 PM
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Re: UMI rear control arm brace dosen't fit

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Originally Posted by David Bates View Post
It really has nothing to do with the bushing as the bolt that goes through the frame, rigid spacer in the bushing and forward lower control arm bracket is in a fixed orientation.
Dave -

You're correct - after taking a second look, the forward brackets no going to allow any movement.

I've had good success with UMI so I'm surprised it's not lining up. Any chance it's a left vs. right difference? I would talk to UMI before cutting and re-welding.

jim
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post #9 of 62 (permalink) Old Oct 2nd, 19, 9:06 PM Thread Starter
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Re: UMI rear control arm brace dosen't fit

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Originally Posted by lucifershammer View Post
Agreed. I put the top on with the bolt loose, then had to lengthen the brace, it and it caused the lower to come into alignment with the lower hole, then slid the bolt through. They were off about 1/8" still but I just tightened them down.
The amount these are off (2") just isn't going to work. I could knock the bolts in with a hammer and tighten those 1/2" bolts down and they would be solid. but the could also be introducing some bind in the control arm movement. Not the way I do things.

Thanks for sharing you experience.

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post #10 of 62 (permalink) Old Oct 2nd, 19, 9:08 PM
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Re: UMI rear control arm brace dosen't fit

I used Detriot Speed braces, made in the USA. Slide on fit. Put hammer and welder away. I would send them back. See the link.

https://www.summitracing.com/parts/d...BoCRzIQAvD_BwE
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post #11 of 62 (permalink) Old Oct 2nd, 19, 9:10 PM Thread Starter
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Re: UMI rear control arm brace dosen't fit

Quote:
Originally Posted by Jim's69Ragtop View Post
Dave -



I've had good success with UMI so I'm surprised it's not lining up. Any chance it's a left vs. right difference? I would talk to UMI before cutting and re-welding.

jim
These are symmetrical. I did talk ti UMI via email, wasn't happy with their response. Basically just force it.

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post #12 of 62 (permalink) Old Oct 2nd, 19, 9:15 PM Thread Starter
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Question Re: UMI rear control arm brace dosen't fit

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Originally Posted by lookback View Post
I used Detriot Speed braces, made in the USA. Slide on fit. Put hammer and welder away. I would send them back. See the link.

https://www.summitracing.com/parts/d...BoCRzIQAvD_BwE
Thanks for the heads up on Detroit speed products.

Unfortunately I bought these some time ago and returning them is not an option, unless UMI steps up.

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post #13 of 62 (permalink) Old Oct 2nd, 19, 9:19 PM
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Re: UMI rear control arm brace dosen't fit

Mine weren't symmetrical. One fit one side one fit the other as they were curved around the floor boards. If your's are straight and not slightly curved, I think you maybe have the wrong braces.

Quote:
Originally Posted by senna View Post
These are symmetrical. I did talk ti UMI via email, wasn't happy with their response. Basically just force it.

1972 Chevelle, 454, 200-4r non-lockup, 12 bolt 3.73
1981 Camaro Z28, 355, TH350, 3.73
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post #14 of 62 (permalink) Old Oct 2nd, 19, 9:24 PM Thread Starter
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Re: UMI rear control arm brace dosen't fit

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Originally Posted by lucifershammer View Post
Mine weren't symmetrical. One fit one side one fit the other as they were curved around the floor boards. If your's are straight and not slightly curved, I think you maybe have the wrong braces.
This photo is both braces stacked on top of each other.



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post #15 of 62 (permalink) Old Oct 2nd, 19, 9:32 PM
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Re: UMI rear control arm brace dosen't fit

Are they perfectly straight? Do you have the part number? Mine have slight curves in each brace to follow the floor just like in the pics on the UMI website.

Maybe I should have asked - what year are you working on? Mine is a '72. They have different parts for the 64-67 and the 68-72.

(Edit - nevermind, just saw it in your signature. The ones from UMI's site for the 64-67 are straight whereas the ones from the 68-72 are angled. Sorry, my experience was from my '72 which has the angled braces.)
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