Two immediate possibilities.

1) Loose CV bolts
2) Bad CV's

Get it up on a rack and check those bolts. I've had this problems 3-4
times over the years. It will cause a knocking noise that makes yu think
for all the world a CV is going to separate.

If torque OK, test run it again. If the sound is still there, it is in
all probability the CV's and only pulling them will give you the clear
insight you need.

Regards,

John Rodgers
88 GL Driver

ScotiaWesty wrote:

>Hi All:
>
>  We've just got back from a trip into the mountains and our '86 has started
>a new sound for us to enjoy. It is an odd steady knocking that starts off
>quietly and can get disturbingly loud quickly.  It has the following
>characteristics:
>
>  - it only appears on slow, long and steep uphill climbs (5%+ grade).
>Doesn't show up if you gathered momentum and get over the hill at a good
>speed.  .
>  - quiets immediately upon release of the accelerator (no good when trying
>to get over the hill)
>  - sounds similar to a pump
>  - always has a  steady rhythm
>
>  It has appeared since we relocated to Colorado.  Altitude?
>
>  If, whatever it is breaks, I fear being stranded.  Clues from the
>educated?
>
>  Dan
>
>
>
>