Hello to all,

I have a 96 GMC safari V6, AT, AWD.

The front differential drive shaft (from transfer case) was removed a few
months ago because it was bad,(vibrating at high speeds) and consequently,
it drove fine in 2wd at the time.
Now, above 35 MPH it starts a steady hum in the front end. The pitch
increases with speed and it seems to level out at cruising speed on the
highway.

I have pulled the front diff in an effort to find the problem. Luckily, I
must say that the diff it was real easy to pull.
It seemed that the backlash on one side was a bit excessive -( I don't know
the Specs) and it seems on one side the gears may be rough like they are
catching a bit on the edge of teeth.
Will this be hard to rebuild? I have never rebuilt a diff or AT before;
gearboxes/engines/diesels yes.
Based on description would diff be at fault?? CV's and bearings seem okay,
no play at all.
So now I need info and advice, I can't ID the differential, no tag and the
stamped numbers don't match anything.
Any help appreciated.
Thanks,
tink

Don't have the answer, but feel free to drop by www.astrosafari.com
for a site and message board dedicated to Astro/Safari vans.

Matt
99 V-10 Super Duty, Super Cab 4x4
96 GMC Safari AWD Hi-Top Conversion


On Mon, 18 Aug 2003 16:45:10 GMT, "Tink" <tinkn69123@yah3oo.com>
wrote:

>Hello to all,
>
>I have a 96 GMC safari V6, AT, AWD.
>
>The front differential drive shaft (from transfer case) was removed a few
>months ago because it was bad,(vibrating at high speeds) and consequently,
>it drove fine in 2wd at the time.
>Now, above 35 MPH it starts a steady hum in the front end. The pitch
>increases with speed and it seems to level out at cruising speed on the
>highway.
>
>I have pulled the front diff in an effort to find the problem. Luckily, I
>must say that the diff it was real easy to pull.
>It seemed that the backlash on one side was a bit excessive -( I don't know
>the Specs) and it seems on one side the gears may be rough like they are
>catching a bit on the edge of teeth.
>Will this be hard to rebuild? I have never rebuilt a diff or AT before;
>gearboxes/engines/diesels yes.
>Based on description would diff be at fault?? CV's and bearings seem okay,
>no play at all.
>So now I need info and advice, I can't ID the differential, no tag and the
>stamped numbers don't match anything.
>Any help appreciated.
>Thanks,
>tink
>
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