when dynoing an auto use overdrive. Have been around the mobile dyno in town for a while and every truck that hits the rollers makes more power in od than in drive. you just run it up to about 65 and get on it, it will not downshift and give best numbers. At the norcal rally last year you get 3 pulls and everyone would say they were going to dyno in drive because it will make better power so they did first pull in drive 2nd in od and 3rd in od as it works. even the manual guys with a 5spd make more in 5th than 4th and 6spd guys make more in 6th than 5th

 

that depends on the type of the dyno, if its an inertia dyno(most mobile ones are) then yeah, OD or 5/6 gear will yield better numbers because of the way the dyno works., an inertia dyno works by taking topspeed that you hit on the run and dividing it by how long it takes the truck to get to top speed and then it converts it to HP and TQ,

a load dyno however, you want to be in direct drive, especially for accuracy. load dynos tend to be the most expensive to own and operate and are pretty much the best type of chassis dynos out there. a load dyno puts a load on motor and works by seeing how fast the truck accelerates with said load(usually the load rate is similar to what the truck would see on the street).

to put this in perspective, at DHRA in indy last june, they had a inertia dyno, in 5th gear my truck showed almost 580 hp, which i know is waaaaaaayyyyyy high considering im on the stock hx 35! now on the 4 load dynos that ive been on since in which i ran in 4th gear, they all show right around 450 hp and 1100 ft lbs. in 5th gear, i lost power ratings each time on a load dyno.

 

Hey now! Mines got 190,000 miles on it. Changed it at 42k
Now got 230,000. But I am now seeing bad mileage. And a small loss of power!
Can't seem to want to change it out too! Wanna see how long it will last!

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Did you check the apps yet! Check the voltage on it! I did this on mine a whike back and it made a big diffrence
Just a thought good luck!

Hope this work my blackberry is acting funny again. Check the voltage on itReset

 

haha..yeah i think im gonnas run mine til it fails too...unless i can get a bargain on one

 

do you lose power above 2200 rpm and it feels gutless? thats what my original vp did a long long time ago ran like crap too. good down low then blam no power id say see if you can tryu a different vp for a first time job it will take like 2 hours to change so a weekend is best and try to use a garge and arnt you in florida shoot it cant be below 50 there

 

yep...thatll be soon...but the rear end broke yesterday so now im f'd on the vp job...man ill tell ya im gettin tired of werkin onthis truk

 

howd the hell did you break the rearend?

 

long story realated to a gear swap....broke the spider gear and it went thru and just turned everything inside the diff hsg into a bunch of gray ball brgs....

it aint pretty and findin a good rear guy is impossible anymore