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Uneven front spring compression

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Old Jan 12, 2008 | 09:35 AM
  #1  
workingdog's Avatar
workingdog
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Uneven front spring compression

After my Cummins was installed in my '68 F250 Highboy my truck was leaning to the drivers side a lot. A friend and I looked at it yesterday and the drivers side front spring is compressed 1" more than the passenger side. I know I have to get new front springs (and eventually a new front axel) to handle the weight of the Cummins, but to order the springs I really should know the weight difference left to right. I've tried to find a garage with a "four corner scale" like they use for race cars but have had no luck - any ideas on how to tell how much heavier the drivers side is than the passenger?

Peter
 
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Old Jan 12, 2008 | 10:02 AM
  #2  
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Dave Severson
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check with some of your local roundy rounders, most of the good ones will have their own set of scales and for a minimal charge would set your truck on them.... But too be accurate on determining the size of springs required for replacement you should have the old one's removed and have the front end setting on the snubbers..... A good parts store, not the one's with the guy who sez if it isn't in the computer it doesn't exist, will have a spring catalog that will list springs of the same configuration by load rating and/or spring rating..... IMO anything else is just guesswork.
 
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Old Jan 12, 2008 | 10:26 AM
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NumberDummy
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Originally Posted by workingdog
After my Cummins was installed in my '68 F250 Highboy my truck was leaning to the drivers side a lot. A friend and I looked at it yesterday and the drivers side front spring is compressed 1" more than the passenger side. I know I have to get new front springs (and eventually a new front axel) to handle the weight of the Cummins, but to order the springs I really should know the weight difference left to right. I've tried to find a garage with a "four corner scale" like they use for race cars but have had no luck - any ideas on how to tell how much heavier the drivers side is than the passenger?
Peter
The main leaf will have a Ford ID number stamped on it near the eye bolt.

1967/71 F250 4WD

These two are the only front springs listed in the 1964/72 Ford Truck Parts Catalog.

Right & left are the same spring - as original.

Marked: C7TA-5310-E / 5 leaf / D3TZ-5310-J / 1200 lb. load rate.

Marked: C7TA-5310-AR / 6 leaf / D3TZ-5310-H / 1551 lb. load rate.

The original 1967 part numbers were updated by Ford to 1973 part numbers.

1972 F250 4WD's have different load rates left/right, but not 1967/71's.

Have the original springs been changed?

Whatever ID number you find, I can cross it over and find out the part number & the load rate.
 

Last edited by NumberDummy; Jan 12, 2008 at 10:37 AM.
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Old Jan 12, 2008 | 03:06 PM
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Yes, these springs are new from last year, before I decided to to the Cummins. So I'll have some good front springs for sale cheap once this is done.

Roundy rounders? You mean circle track racers? I might know where one of those is.

We talked to Alcan about springs, they said they could supply almost any load rating in the correct configation - they just need to know the weight.

Peter
 
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Old Jan 12, 2008 | 05:23 PM
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cornfedp
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From: DeWitt Ne.
Do you know any DoT officers? I am willing to bet a DoT officer would have the mobil scales that they use to weigh big rigs on the road.
 
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