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Old 05-07-2009, 09:38 PM   #29
Vintage Kin
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Corpus Christi , Texas
Join Date: Nov 2006
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Plus Andy's site at Inland RV had an article on how to check axles.

The other item not mentioned (and helped me tremendously on interior evidence of rough ride) was balancing new tires on a HUNTER GSP-9700 Roadforce; plus CENTRAMATIC Wheel Balancers on my solid axle Silver Streak trailer.

On the TV I changed over to BILSTEIN shocks. I need, still, to add an aftermarket rear anti-roll bar.

The final piece of the equation on my truck is replacing the factory receiver with a TORKLIFT heavy-duty piece as I believe that the wimpy factory piece did not resist "twist" from my similar size/weight trailer as yours.

This is the form I use to check out numbers:

Get all the numbers, and try NickCrowhursts Calculator

Crowhurst Calc: Excel spreadsheet

1. TT Length, Hitch Ball Center to TT Rear Bumper:

2. TT Tongue Weight:

3. TT Hitch Center to Rear Axle Center:

4. TV wheelbase:

5. TV Rear Spring Capacity:

6. TV Rear Overhang (axle center to hitch center):

7. Length of bars:

A. TV Steer Axle, Solo:
[1] TV Steer Axle, Loaded:

B. TV Drive Axle, Solo:
[1] TV Steer Axle, Loaded:

C. TV Weight Bias, FF/RR, Solo:
[1] Loaded:

D. TV Weight, Solo, Gross:

E. TV Weight, Loaded, Gross:

F. TT, Tongue Weight:

G. TT, Axle Weight (all axles):

H. TT, Axle Weight (front):

I. TT, Axle Weight (rear):

J. [TT, Axle Weight (center):]

I. TV, FF, height, solo:

II. TV, FF, height, loaded:

III. TV, RR, height, solo:

IV. TV, RR, height, loaded:

V. TT, height (fenderwell), solo:

VI. TT, height (fenderwell), loaded:

The two dozen numbers can be useful for further tuning or understanding. On my truck I was ready to try modifying the rear suspension by removing the huge single overload spring, one spacer; and add TIMBREN overload replacements in a custom height. Not that you should. The point is, IMO, to keep searching out solutions as you are doing.

Keep checking. Keep posting.

1990 35' Silver Streak Sterling; 9k GVWR.
2004 DODGE Cummins 305/555; 6-manual; 9k GVWR.
Hensley Arrow. 10-cpm solo, 18-cpm towing
Sold: Silver Streak Model 3411
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