Author Topic: Subframe Connecters  (Read 2432 times)

Zach

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Subframe Connecters
« on: April 05, 2025, 03:55:44 PM »
Going to be my next purchase just want to make sure I get a quality set, opinions on welded vs bolt on. Should I also upgrade to solid bushings, etc, etc. I think I had my eyes on the PTFB ones wondering if anyone has any thoughts. My car had American T Tops put on by the dealer so there is VERY little of my roof left with very little support, should've done this sooner it'll probably solve a few issues I am having. Not hard for me to get the car off the ground or rip the interior out depending on installation choice, just want a quality set that is known to be good. Thanks.
1977 #s W72 400 4 Speed Trans Am
1971 351c 4 Speed Mustang Mach 1

stros

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Re: Subframe Connecters
« Reply #1 on: April 05, 2025, 04:17:05 PM »
I’ve had my PTFB ones for over 10 years now.  Bolted on - not welded.  They’ve been great.  They do hang down a tad low on my lowered T/A.  I did PTFB solid body bushings at the same time.  Tightened the entire car up.  Not sure if it made the ride any harsher as I did shocks and springs at the same time.  My T/A handles great - the ride is a little harsh on bumps but not too bad.  I don’t have t tops though.
Darryl

'77 black TA Hardtop LS3 / 4L70E swap
Build thread:
http://transamcountry.com/community/index.php?topic=61066

Wallington

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Re: Subframe Connecters
« Reply #2 on: April 05, 2025, 05:20:22 PM »
If your ride becomes harsh it simply means your already harsh suspension is not being absorbed and muffled so much! Solid or poly for bolted-in SFCs. PTFB here also, although not driven in 15 years, more solid sitting there.

Zach

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Re: Subframe Connecters
« Reply #3 on: April 05, 2025, 06:40:15 PM »
Sweet thanks seems I will stick with PTFBs. My suspension isn't helping either it needs a refresh. At least the connectors I can set and forget and move on to other ride upgrades.

Are the PTFB key-lock body bushings the ones I want to be looking at by the way? I can only imagine my current ones are shot like everything else.
« Last Edit: April 05, 2025, 06:46:32 PM by Zach »
1977 #s W72 400 4 Speed Trans Am
1971 351c 4 Speed Mustang Mach 1

stros

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Re: Subframe Connecters
« Reply #4 on: April 05, 2025, 11:11:17 PM »
Sweet thanks seems I will stick with PTFBs. My suspension isn't helping either it needs a refresh. At least the connectors I can set and forget and move on to other ride upgrades.

Are the PTFB key-lock body bushings the ones I want to be looking at by the way? I can only imagine my current ones are shot like everything else.

Yes I believe so. 
Darryl

'77 black TA Hardtop LS3 / 4L70E swap
Build thread:
http://transamcountry.com/community/index.php?topic=61066

Re: Subframe Connecters
« Reply #4 on: April 05, 2025, 11:11:17 PM »

N PRGRES

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Re: Subframe Connecters
« Reply #5 on: April 06, 2025, 05:29:37 AM »
I also have the connectors and solid bushings, can handles awesome, I have a BMW that travels the same road as me on my way home, I stayed glued to his bumper, although my 15" rims make that a bit of an experience lol
Dave

81 Trans Am w/73 400.

stros

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Re: Subframe Connecters
« Reply #6 on: April 06, 2025, 10:11:35 AM »
In case you’re interested on improving the rest of the suspension. I did the PTFB GT springs, Viking dual adjustable shocks, PTFB Blade front sway bar with welded mounts, PTFB rear sway bar and SPC upper control arms.  Went with SPC as I preferred their non shim based adjustments but I’m sure the PTFBs are fine as well.

It handles like it’s on rails/ like a go cart. For some reason the Blade bar and the upper control arms really took everything to the next level.  The control arms allow for more caster in the alignment.  It handles much better on the freeway after adding those too.

The only thing that’s not perfect about it is the adjustments on the shocks are hard to get to. I found a setting I liked and haven’t changed them probably for 5 years now.  I have to keep them a bit on the stiffer side as when they were set to softer settings my 285/17 rear tires would sometimes rub on bumps.

Sometimes I think it’s a little too low, as mentioned above I have to be careful on speed bumps as the connectors can hit.
Darryl

'77 black TA Hardtop LS3 / 4L70E swap
Build thread:
http://transamcountry.com/community/index.php?topic=61066

Zach

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Re: Subframe Connecters
« Reply #7 on: April 06, 2025, 11:37:44 AM »
In case you’re interested on improving the rest of the suspension. I did the PTFB GT springs, Viking dual adjustable shocks, PTFB Blade front sway bar with welded mounts, PTFB rear sway bar and SPC upper control arms.  Went with SPC as I preferred their non shim based adjustments but I’m sure the PTFBs are fine as well.

It handles like it’s on rails/ like a go cart. For some reason the Blade bar and the upper control arms really took everything to the next level.  The control arms allow for more caster in the alignment.  It handles much better on the freeway after adding those too.

The only thing that’s not perfect about it is the adjustments on the shocks are hard to get to. I found a setting I liked and haven’t changed them probably for 5 years now.  I have to keep them a bit on the stiffer side as when they were set to softer settings my 285/17 rear tires would sometimes rub on bumps.

Sometimes I think it’s a little too low, as mentioned above I have to be careful on speed bumps as the connectors can hit.

Sweet I will keep this in mind, need to get my moms mustang on the road before I rip apart the TA figured the subframe connectors are an easy bolt on and a necessity. Eventually I will get full suspension.



Thanks again for the responses.
1977 #s W72 400 4 Speed Trans Am
1971 351c 4 Speed Mustang Mach 1

FormTA

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Re: Subframe Connecters
« Reply #8 on: April 07, 2025, 11:27:32 AM »
I too have the PTFB connectors, solid keyed body mounts, GT rear springs. Like everyone else, it was a great upgrade. Handles like it's a slot car. I have stock front A arms but hotchkis 2 lowing springs.

I wish the old post was still around.... Someone had a great write up on installing them. I know a right angle drill or drill attachment really helped me. Depending on the floor condition, you may have a cage nut break free when trying to install the solid body mounts. That really extends the install time.

I did tack weld mine after bolting but it's not necessary.

Maybe make a write up on it when you do it.
79 Trans am low buck LS swapped
79 Formula 301 (Work in progress)
67 RS Camaro (waiting it's turn)
69 Dodge charger on late model charger chassis
49 Ford F1 on a 2003 Chevy ZR2 Chassis (current project)
Names, Luke. If I hear anyone telling me they're my father....

Wallington

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Re: Subframe Connecters
« Reply #9 on: April 07, 2025, 08:48:46 PM »
I posted pics but not sure it was a write-up or just pics for a question  asked. Yes, right angle drill was handy. I think i had to make pilot hole in both sides and drill each side separately to keep square, more to do with length of drill on hand perhaps.
With the PTFB kit I also added inner crush tunes as they used a single bolt through the lot. They have now changed this to separate bolts in each side, not through the lot.
Hardtops are obviously more rigid but their flexing focuses on the top rear corner of the side door opening and hairline cracks are common. T-tops, being a jelly on wheels have so much flex that they occur everywhere, and often no cracks there, so a bonus kinda! I think some still do, proof they were a bridge jump car once!
« Last Edit: April 07, 2025, 08:52:27 PM by Wallington »

Zach

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Re: Subframe Connecters
« Reply #10 on: May 14, 2025, 01:33:39 PM »
500 bucks later pulled the trigger on the PTFB sub frame connectors and solid body bushings. Hopefully install goes well, this car is shockingly rust free on the under side for a Minnesota car.
1977 #s W72 400 4 Speed Trans Am
1971 351c 4 Speed Mustang Mach 1

Zach

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Re: Subframe Connecters
« Reply #11 on: May 31, 2025, 10:28:06 AM »
Well it says they shipped 4 days ago but ups says they don’t have possession of the package, whoever runs PTFB also hasn’t gotten back to me either. Anyone have similar experiences? Wondering if I should be concerned. Placed the order 2 weeks ago.
1977 #s W72 400 4 Speed Trans Am
1971 351c 4 Speed Mustang Mach 1

stros

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Re: Subframe Connecters
« Reply #12 on: May 31, 2025, 10:43:24 AM »
Well it says they shipped 4 days ago but ups says they don’t have possession of the package, whoever runs PTFB also hasn’t gotten back to me either. Anyone have similar experiences? Wondering if I should be concerned. Placed the order 2 weeks ago.

I’d recommend trying to call them directly.  PTFB is a one man shop so it’s possible he’s off on vacation or something.  I’ve had stuff ship slow from them sometimes but I have always gotten what I’ve ordered eventually.  I think they’ve generated a label at times too when the product was still off getting powder coated first. 
Darryl

'77 black TA Hardtop LS3 / 4L70E swap
Build thread:
http://transamcountry.com/community/index.php?topic=61066

Zach

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Re: Subframe Connecters
« Reply #13 on: May 31, 2025, 11:34:43 AM »

I’d recommend trying to call them directly.  PTFB is a one man shop so it’s possible he’s off on vacation or something.  I’ve had stuff ship slow from them sometimes but I have always gotten what I’ve ordered eventually.  I think they’ve generated a label at times too when the product was still off getting powder coated first.

Ok sounds good, haven’t ordered from them before so I wasn’t sure on their process or man power. I will give him a call sometime next week. Thanks.
1977 #s W72 400 4 Speed Trans Am
1971 351c 4 Speed Mustang Mach 1

langss

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Re: Subframe Connecters
« Reply #14 on: May 31, 2025, 11:35:46 PM »
This is not PTFB, but shipping related. Last year I ordered stuff from both BMR and UMI. Because of the Material I chose, and the fact that it was for an older car, it took a long time to get to me. I don't remember which vendor it was, but I wasn't even sure the order went through. When I called, I was told they had to order Material to make the part. One was very responsive, the other not so much. In the end it all arrived, it just took a long time. Those are both Big Business...as mentioned above, PTFB is a one man operation.

Re: Subframe Connecters
« Reply #14 on: May 31, 2025, 11:35:46 PM »

Zach

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Re: Subframe Connecters
« Reply #15 on: June 02, 2025, 01:18:25 PM »
Finally responded, was from Facebook. Waiting on the bushings to be plated. Bit annoying they are marked as shipped but what ever, just gotta wait.
« Last Edit: June 02, 2025, 03:29:59 PM by Zach »
1977 #s W72 400 4 Speed Trans Am
1971 351c 4 Speed Mustang Mach 1

N PRGRES

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Re: Subframe Connecters
« Reply #16 on: June 03, 2025, 07:56:09 AM »
Finally responded, was from Facebook. Waiting on the bushings to be plated. Bit annoying they are marked as shipped but what ever, just gotta wait.
As a small business owner, I will tell you that most shipping software marks it as shipped when the label is created.  He probably got the label ready in advance
Dave

81 Trans Am w/73 400.

Re: Subframe Connecters
« Reply #16 on: June 03, 2025, 07:56:09 AM »
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