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2020

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Rear Spring deflection normal '49 3100? #1332804 Wed Nov 06 2019 11:40 PM
Joined: Nov 2018
Posts: 58
J
Joe S. Offline OP
Wrench Fetcher
Dear friends,

I put 400 pounds in my recently restored 3100's bed and was amazed at how much the springs deflected given their robust appearance. If i loaded it with 1000 pounds the deflection it might have would be extreme, with the rear of the truck really sagging. The load was wood heating pellets. With my GM SUV rated at 1/2 ton, with a thousand pounds it barely is noticeable! See the pictures. one with no load and the other with 400 pounds.

Best regards,

Joe

Attached Files
IMG_2935[1].JPG (262.94 KB, 79 downloads)
IMG_2936[1].JPG (283.39 KB, 74 downloads)
no load

'49 3100 "Sweet Caroline" because the truck has fabulous curves .... like Caroline!
Re: Rear Spring deflection normal '49 3100? [Re: Joe S.] #1332825 Thu Nov 07 2019 02:45 AM
Joined: Mar 2010
Posts: 8,785
5
52Carl Offline
Master Gabster
Looking at the severe angle of your spring shackles with no load, I am guessing that you have a set of tires springs. They should be closer to perpendicular to the ground without a load in the bed. I bet it rides smoother with those tired springs. I know mine does.

Re: Rear Spring deflection normal '49 3100? [Re: Joe S.] #1332830 Thu Nov 07 2019 03:06 AM
Joined: Feb 2019
Posts: 542
P
Phak1 Offline
Jack of all Trades, Master of None
It could be an illusion but your main spring by the u-bolts looks strange. It should follow the same arch going thru the u-bolts and yours seem to have some strange bends. My bet is you got a cracked spring or two in the spring assembly.

Attached Files

Phil

1952 Chevrolet 3104
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Rear Spring deflection normal '49 3100? [Re: Joe S.] #1332854 Thu Nov 07 2019 01:13 PM
Joined: Feb 2019
Posts: 542
P
Phak1 Offline
Jack of all Trades, Master of None
I just took my front springs apart due to worn eyes and found one cracked spring and an extra spring on one side. Nine on the drivers side and eight on the passengers side. I surmise they added a spring because the spring assembly was sagging and didn’t notice the cracked spring.

I ended up buying new main springs from Classic Parts and reassembled the spring pack with liners. I was able to cut the additional spring to the size of the cracked spring so now all is good.

It was allot of work and if It wasn’t that I wanted to install liners, I should have just bought new springs.

Attached Files
Last edited by Phak1; Thu Nov 07 2019 01:18 PM.

Phil

1952 Chevrolet 3104
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator

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