Hi DMLers,
In addition to the conditions below that I mentioned. I found another seperate condition
where the vibration occurs. If the truck is going 50 to 75 or so and you put it in
neutral then the vibration occurs. You put it back in drive and give it gas and the
vibration goes away after a sec or two.
original conditions:
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.
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".
5. ) So basically what we have here is the driveshaft freely spinning at high rpm and no
load.
Does anyone one want to play "guess that problem"?
We have so far: a. transfer case ( i dont have one :-) )
b. U-Joints ( U-Joints were replaced when the tranny was rebuilt )
c. ( put your hunch here )
thanks DMLers.
=====
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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