MiddleAgePhart

Hello to all and I hope that someone can help me with my problem.

I have a '95 F150 standard cab, 2WD, inline 6cyl engine, 4 speed tranny (3+OD) with some weird vibration problems and need help to diagnose:

Only happens in 3rd and OD gear.
Only happens when accellerating.
Sounds like I'm driving over 'rumble' strips.
I can feel the vibration through the steering wheel, dash board, arm rest, ect...
Is intermittent, sometime it happens sometimes not although it is happening more as time goes by.
Experiencing a 'loss of power' during this.
No codes, no check engine light, no check transmission light on gear shifter (I was told that if the tranny had problems, that the OD light will flash on the gear shifter).
When I release the accelerator and depress the accelerator again, the vibration and sound goes away 'most' of the time.

I do believe it is a drivetrain problem. Not the u-joints, diff, axels, or tires.

Any suggestions?

TIA

jwko

I'd definitely get that checked out.

r60793

maybe misfire?

MiddleAgePhart

Solved.

I replaced the tranny filter and that seems to have resolved the problem. All I can figure is that it was suffering from fluid starvation due to the filter being dirty and not allowing sufficient fluid to be passed to the pump and thus the torque converter which resulted in the vibration.

Bad filter. The tranny fluid was fine and the magnet had a very small amount of crud from the normal wear of the clutche plates. No metal flakes.

Will continue to keep an eye on it.