Transmission "Thud" after taking off from a stop.

[bs46488]

Hi guys:

I just bought a used explorer, so I've been using the forums to clean up my X a little. This is my 3rd Explorer.

Anyway, this one is a 1997 V8 AWD with an Auto (49k). I was told it was a AOD transmission, but I haven't confirmed yet. When I come to a complete stop, after I take my foot off the brake a get a big "Thud" sound from the driveline. Is this the drive shaft? How do I fix it?

Also, I get a lot of whine from the transfer case. Will changing the fluid make the noise go down a little? It's usually only between rpms of 1500 - 2500ish.

Thanks

 

[spindlecone]

Most likly U-joints

 

[toy720]

Actually you have the 4r70w Close to the aod but not the same.

 

[punkska52]

Probably the Transfer Case...I'm having the same "thud". Ireplaced the CV axles and joints ...still no fix. Let me know what you find.

THanks

 

[Turdle]

Is it 1 single thud, right under your feet(driver) when starting from stop, or from reverse to forward?
Like someone hit under floor with a hammer?

 

[BrooklynBay]

Check your mounts if it's not the U joints.

 

[SmSgt]

Did you find it yet?
When I worked for GM we had the same problem and what the "fix" was .. was to remove the drive shaft and put a little greese on the output shaft of the trans where it went into the drive shaft. it sounded nuts but it did work.

 

[BrooklynBay]

SmSgt, I remember another thread that said the same thing you just mentioned. IZWack was the one in that thread that suggested greasing the slip yoke.

 

[joshuaj0214]

guys i was told at the dealer that the noise was normal. they said its the driveshaft "winding up" after being stoped. sounded like bs to me but i didnt know it was a common problem.I have checked my u-joints trans with no luck.

 

[Kadahaf]

the slip yoke.

puill your drive shaft off and lube the hell out of the tranny end with white lithium and it'll go away