Suspension TECH Including Brakes, Wheels and tires

          
Reply
 
Thread Tools Display Modes
  #1  
Old 06-07-2025, 11:32 PM
Stripes's Avatar
Stripes Stripes is offline
Senior Chief
 
Join Date: Sep 2017
Location: DFW area, Texas
Posts: 405
Question Upper control arm removal issue 74 Trans Am

On my 74 Trans Am, I am trying to remove the upper control arm on the passenger side. I removed the lower arm, spindle, shock, and the 2 nuts on the two splined bolts that go thru the upper control arm.

The issue is I cant push the top of the control arm in far (toward the engine) enough to clear the frame bolts that hold the upper control on. I literally have interference against the engine trying to get the cross shaft to clear the bolts. Its close, but metal to metal. What am I missing here? I've done second gens before without an issue. It's like the upper bolts are extra long! Should I try to pry the bolts out?

  #2  
Old 06-08-2025, 12:58 PM
ZeGermanHam's Avatar
ZeGermanHam ZeGermanHam is offline
Ultimate Warrior
 
Join Date: Nov 2016
Location: Seattle, WA
Posts: 2,041
Default

Are the control arm bolts are oriented so that the bolt head is on the inboard side (in engine bay) and the nut is on the outboard side? If so, they are backwards and were likely installed when the engine or manifolds/headers were not in the car. If you don't have the clearance, I'd probably just cut them and install new bolts in the correct orientation.

If they are not in backwards, do you have enough room to tap the bolts out of the frame? Maybe get creative with a pry bar if no room for a hammer?

__________________

1966 Pontiac GTO (restoration thread)
1998 BMW 328is (track rat)
2023 Subaru Crosstrek Limited (daily)
View my photos: Caught in the Wild
  #3  
Old 06-08-2025, 01:49 PM
78w72 78w72 is offline
Suspended
 
Join Date: Nov 2007
Location: iowa
Posts: 5,598
Default

Should be able to tap the bolts out without much force, they are serrated & just a light press fit into the fame tower, might be a little rusty but should come out with a few taps of a hammer.

I have seen these bolts be a lot longer than they need to be, if you have enough bolt length for the alignment shims, you can cut the bolts to be a little shorter.

  #4  
Old 06-08-2025, 09:08 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 21,706
Default

As he said tap them out some past the knurling.

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
  #5  
Old 06-09-2025, 08:22 AM
scott70's Avatar
scott70 scott70 is offline
Ultimate Warrior
 
Join Date: May 2002
Location: maine
Posts: 2,732
Default

I recently had that problem on the driver side on my gto. Passenger side was close but I was able to get control arm off before running into the engine. Driver side wouldn’t quite clear. I took a sawzall and trimmed a small amount off the end of the bolts so I could sneak the control arm out. I couldn’t see any way of tapping the bolts out with the engine in the way. Trimming worked just fine. I think I only removed maybe 1/8th inch.

__________________
72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007
(cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD
1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.45 @ 88.1 mph on slippery street tires.Bad 2.19 60ft.Owned since 86'
  #6  
Old 06-09-2025, 01:42 PM
tooski tooski is offline
Chief Ponti-yacker
 
Join Date: Oct 2010
Location: Thunder Bay, Ontario
Posts: 717
Default

I just did this on both sides of my 75. I ran the nuts to the end of the bolts and tapped the the nuts with a 3 lb sledge turned side ways. Not much of a swing, but enough to knock out the bolts relatively easily.

__________________
Frank M.
75 Firebird
68 Firebird 400 RAIII
66 Chevy II 461 Pontiac in AZ
The Following 2 Users Say Thank You to tooski For This Useful Post:
  #7  
Old 06-09-2025, 03:44 PM
Sirrotica's Avatar
Sirrotica Sirrotica is online now
Ultimate Warrior
 
Join Date: Jan 2005
Location: Catawba Ohio
Posts: 7,554
Default

Or, you can remove the motor mount bolts, raise the engine up and have plenty of room to remove the upper A arms. More than one way to get a job done.

Knocking the bolts out of the serrations may get you into a situation that the bolts will only stay in place by tack welding them back into the frame mounts. Having run a front end alignment rack you really don't want the bolts spinning in the mounts if you're trying to tighten them back down.

__________________
Brad Yost
1973 T/A (SOLD)
2005 GTO
1984 Grand Prix

100% Pontiacs in my driveway!!! What's in your driveway?

If you don't take some of the RACETRACK home with you, Ya got cheated

  #8  
Old 06-09-2025, 06:33 PM
Stripes's Avatar
Stripes Stripes is offline
Senior Chief
 
Join Date: Sep 2017
Location: DFW area, Texas
Posts: 405
Default

Thanks all, I was able to get a long pry bar in from underneath and pry the bolt back past the knurling. Thanks for all the ideas!

The Following User Says Thank You to Stripes For This Useful Post:
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:35 PM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017