Ram Cummins/Aisin Failures
Been hearing and reading about Cummins, Emission and Aisin failures on the 5th gen Ram trucks. Cummins Failure
Forum Discussion
blt2ski wrote:i am pretty sure there can be no hard and fastfst formula on this.most tvs have leaf springs in the rear which are naturally progressive, and some have overload springs which make them even more so.
Even the formula spouted by one person for ball mounts, was like a clock, but only correct once in a range of 1-1500 lbs of HW.
Reason, a pickup starts tail high! so you pull less weight off of the front initially. BUT, as you go with more weight, the tail drops, and you pull more weight off the front as your hitch weight increases! To a point you might be pulling 1-2 lbs off the front, for every lb or 100 lbs of weight you add.
My Navistar for instance, only has 60-100 lbs off the front, with 1500 lbs added to the rear. His formula said some 300-400 lbs. 1500 on a 16500 RA that takes some 5-6000 lbs before the springs even think about compressing.
Meanwhile my 96 CC, when I had the stock 6400 lbs springs, I took about 400 lbs off the front. When I installed 8400 lbs springs, it dropped to 250-300 lbs. Same as my 8500 lb rear spring 05 DW CC GM.
The percentage amount 12V is talking about, or the formula used for ball mounts, works to a point. BUT< one needs to remember that many other factors need to be included as to what is or may be the final number if you are going to depend on math alone!
But, either formula, you need to take into account, spring capacity, softness, wheel base, where the pin/hitch weight is centered vs RA. When you can add a factor to the formula for these issues, you can come closer with math.
Marty
