I had a similar driveline vibration, dealer repeatedly blamed the tires,
which I had rebalanced & were perfect. Dealer again gave the truck a
clean bill of health. Not buying it, on the way back to the dealer to
trade the truck on a Ram, the transfer case grenaded, dropping the
driveshaft on the freeway etc.
> I have a drivetrain vibration that shows up under very
> specific conditions.
>
> all of the following conditions must be met for problem to appear:
>
> 1. ) Cruising at any speeds between 50 and 80 mph.
>
> 2. ) Ease up on the gas so that the drivetrain and engine
> are NOT loading each other.
> ( in other words, torque is *not* being transmitted
> to the wheels and the wheels
> are not sending torque to the back to the engine )
>
> 3. ) The gas is not reduced to the point that we are
> coasting. Because thats torque
> right. Its the vehicle being "braked" the the engine resistance.
>
>
> 4. ) Seems to happen with shifter in "Drive" position and
> not so much in "2" or "1".
>
>
> So basically what we have here is the driveshaft freely
> spinning at high rpm but with no
> load. ( no torque is being transmitted from one end of shaft
> to the other. In either
> direction engine-to-wheels or wheels-to-engine )
>
>
> Any ideas?
>
> -dan kramarsky
>
> =====
> Dan K.
> '92 Grey Dak CC, 318, 4x2, 46RH, 3.92 rear, 235/75R15, PS,
> PW, PB, PL, AC.
>
> Mods: Trans-Go, APS Precision's 2400 stall, cool air
> induction, K&N filter, Autolite 3924s, & re-located IAT sensor.
>
> Future: 180* stat, MP PCM, Stage 1 T.B., HER1418AL Cam, 3"
> Gibson exhaust, March pullies, electric fan, and head porting.
>
>
>
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>
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