Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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Is anyone aware of problems resulting from having 6-wheel knee action units installed on a 5-wheel car? I have a friend that recently bought a partially disassembled 1934 5-wheel coupe that will not be back on the road for a while, and he dicovered it has 6-wheel units installed.


Bill Masters
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Bill,
Are you talking about a 6 wheel car as in fender mounted spares vs. 5 wheel car with rear mounted spare? Or 6 bolt wheels vs. 5 bolt wheels?

Mike


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Thanks for the reply Mike. I am referring to a 6-wheel car as one with spares mounted in the front fenders, and 5-wheels as one with the spare mounted on the rear of the car. The engine is out of the car now, and we assume the ride height will be a little higher, but we don't know how much. Would it be so much that we should change the springs and housing covers?

Last edited by Bill Masters; 12/29/10 01:32 AM.

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Until you mentioned this I didn't know there was a difference but the Parts Book states clearly that there were 2 different units in from '34 to '36. If you read a little further in the Book the difference is specified in the section covering the springs, the housing cover and the adjusting plug. The cover for the 5 wheel units is 2 1/16" high and the cover for the 6 wheel unit is 2 23/32" high. Differences to the housings are not specified.
The units are height adjustable (the repair manual specifies the height and how to adjust the plug), so I would suggest that after assembly (full road weight) the ride height be adjusted. Keep in mind that the springs have probably sagged a bit over time so adjustment would be necessary.

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Thank you Coachhill. The housing caps have the double humps, which I believe are the same as the Pontiac's.


Bill Masters
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Good info! Bill do you have any 6-wheel knee's?


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Bruce S. DeFord
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No Bruce, I don't have any 6-wheel knees.


Bill Masters
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Two quick questions.
First, why do you think the engineers would go to all that trouble to specify different knees for 5 wheel and 6 wheel cars? With the knees out in front of the king pins I don't think clearance to the fender wells would be an issue. Besides, the 6 wheel units are taller than the 5 wheel ones. Is weight a possible consideration?
Secondly, those two-hump covers...are they Dromedary or Bactrian units? laugh

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It's the weight of the 2 tire assy plus the hardware needed to support them to the fender which are also heaverier than an unwelled fender.....Joe


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Coachhill, Because they have two humps, they are Bactrian. rolllaugh


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I would think if the adjustment was turned out as far as possible the front end would be lowered enough for the correct ride heigth. The ride may be a tad stiffer due to the stronger springs.


Gene Schneider

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