70 trailing arm question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1970 C10 MJW · 03-15-2013, 06:43 PM

i have a lot of rust inbetween the two portions of my trailing arms how can I remove that rust, because they are expanding can they be separated cleaned and then bolted together then welded? or do i need to replace?

Sammy · 03-15-2013, 06:50 PM

Quickest is to just replace them. But if your up to it they can be split apart blasted n painted. Some even weld a plate on the top where they "T" together. But cleaning in between them is almost impossible without splitting them..

Sammy · 03-15-2013, 06:58 PM

I have seen them so badly rusted they had holes rusted through the sides the size of quarters. Forty plus years of salt n grime. Someone actually had a pic of a 67 or 68 truck where the arms give way after loading the truck full of wood.

STPrider · 03-16-2013, 08:46 AM

Both of mine snapped right by the ubolts after getting some wheel hop. Its a big headache to fix them after they break, so I would recommend replacing them if you're worried about them at all! The porterbuilt arms are awesome!

1970 C10 MJW · 03-18-2013, 11:32 AM

there is no way im spending that kind of money... so i spent several hours sat and sun... i have some pics of what i cut out and my repairs.. this is the worse side... the pass side arm isnt nearly as bad.. but as you can see they had huge holes...just took my time... and practiced my welding lol

rocknss · 03-19-2013, 03:42 PM

If you do need to replace the trailing arms GMCPauls Truck Parts sells them individuality.

1970 C10 MJW · 03-20-2013, 10:07 AM

well i think I have saved them... but I will not be buying replacements any time soon... they are way out of the budget..

03-15-2013, 06:43 PM	#1
1970 C10 MJW Registered User Join Date: Aug 2012 Location: Indiana Posts: 470	70 trailing arm question i have a lot of rust inbetween the two portions of my trailing arms how can I remove that rust, because they are expanding can they be separated cleaned and then bolted together then welded? or do i need to replace? __________________ 70 C10 working on a LSx swap 4.8L MS3 edelbrock pro flo intake, pacesetter long tubes, 4l60e 2500 stall hoping the tranny holds up lol

03-15-2013, 06:50 PM	#2
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: 70 trailing arm question Quickest is to just replace them. But if your up to it they can be split apart blasted n painted. Some even weld a plate on the top where they "T" together. But cleaning in between them is almost impossible without splitting them.. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"

03-15-2013, 06:58 PM	#3
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: 70 trailing arm question I have seen them so badly rusted they had holes rusted through the sides the size of quarters. Forty plus years of salt n grime. Someone actually had a pic of a 67 or 68 truck where the arms give way after loading the truck full of wood. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"

03-16-2013, 08:46 AM	#4
STPrider Registered User Join Date: Oct 2009 Location: chilliwack, BC Posts: 136	Re: 70 trailing arm question Both of mine snapped right by the ubolts after getting some wheel hop. Its a big headache to fix them after they break, so I would recommend replacing them if you're worried about them at all! The porterbuilt arms are awesome! __________________ '71 GMC pickup; "Ashley,"

03-18-2013, 11:32 AM	#5
1970 C10 MJW Registered User Join Date: Aug 2012 Location: Indiana Posts: 470	Re: 70 trailing arm question there is no way im spending that kind of money... so i spent several hours sat and sun... i have some pics of what i cut out and my repairs.. this is the worse side... the pass side arm isnt nearly as bad.. but as you can see they had huge holes...just took my time... and practiced my welding lol Attached Images __________________ 70 C10 working on a LSx swap 4.8L MS3 edelbrock pro flo intake, pacesetter long tubes, 4l60e 2500 stall hoping the tranny holds up lol

03-19-2013, 03:42 PM	#6
rocknss Registered User Join Date: Oct 2004 Location: Milwaukee, WI Posts: 403	Re: 70 trailing arm question If you do need to replace the trailing arms GMCPauls Truck Parts sells them individuality.

03-20-2013, 10:07 AM	#7
1970 C10 MJW Registered User Join Date: Aug 2012 Location: Indiana Posts: 470	Re: 70 trailing arm question well i think I have saved them... but I will not be buying replacements any time soon... they are way out of the budget.. __________________ 70 C10 working on a LSx swap 4.8L MS3 edelbrock pro flo intake, pacesetter long tubes, 4l60e 2500 stall hoping the tranny holds up lol

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