|
could be the trans
check trans and engine mounts
almost sounds like a bad pinion angle has chewed something up but thats impossible because you kept the oem shaft until now. unless the mounts are bad.
need pictures of the drain plugs. Some metal shavings is quite normal. It can look like a prickly pear and be 'normal' if the pieces are small slivers and not chunks
Redline Gl-4 is good for the trans. I assume that you are using a stock diff though?
if so, diff is cheap, replace with a 'free' other stock diff (even i have a spare sitting in the back yard) to diagnose that
same with trans, dime a dozen, swap it out. Worst case is the trans you take out is good and now you have a spare.
always keep spare parts for these cars.
other things you can try is, rolling the car in gear vs in neutral, different gears, (reverse vs drive noise). When the carrier is loaded in reverse the whole geartrain has to work 'backwards' as the load is applied to opposite faces... or whatever... so if the noise is strong in reverse or when you engine brake in gear it points to the opposite face of the gears (all of them, trans/diff) which could be the gear itself or the backlash/thrust type of settings
And final word of caution about the single piece driveshaft. If it isn't absolutely perfect it will create all manner of issues. I mean, its balance, phase, length, and the angle, have to be spot on.
Since the car uses an IRS the driveshaft pinion angles need to be equal and opposite. So measure front and back using a $5 harbor freight magnetic angle to be sure.
|