89 aw4 np231 8.25 d30 2" lift
Ok, Ive had grinding noise with light throttle at speed ive been tracking down for, oh.. 5months or so. It happens at 35+ mostly. My pinion angles are within 1* and I have no vibration. New u joints, swapped d35 to 8.25, used the d35 shaft so I have plenty of slip yoke engagement, with a YJ yoke. Tcase overhauled with 6pinion planetary, shift fork, tail shaft bushing. New motor and trans mount.
I thought its been driveline issue all a long, but now im thinking something else like flexplate.
I don't have any terrible noise at idle, start up, dropping into gear etc. I have the grinding noise while driving and I can kind of get it to do it if I get up to speed, shift to neutral and hover the throttle up a bit. Also, if im cruising and I snap the throttle and let off quickly I get a very audible clacking noise from mid vehicle. Its nasty.
The other day I wheeled around cline butte for a while, once I got back on the highway it wasn't as bad as it has been, almost not there. I didn't try to get it to make the clacking noise tho. The next day the grinding was back.
Im thinking flexplate. The TC bolts where ok but I think ill drop the inspection plate pull the TC bolts out and pry the Flexplate to see if the bolts at the crank are loose, missing, or anything..
Anybody have some info for me?
thanksHasta
Ok, Ive had grinding noise with light throttle at speed ive been tracking down for, oh.. 5months or so. It happens at 35+ mostly. My pinion angles are within 1* and I have no vibration. New u joints, swapped d35 to 8.25, used the d35 shaft so I have plenty of slip yoke engagement, with a YJ yoke. Tcase overhauled with 6pinion planetary, shift fork, tail shaft bushing. New motor and trans mount.
I thought its been driveline issue all a long, but now im thinking something else like flexplate.
I don't have any terrible noise at idle, start up, dropping into gear etc. I have the grinding noise while driving and I can kind of get it to do it if I get up to speed, shift to neutral and hover the throttle up a bit. Also, if im cruising and I snap the throttle and let off quickly I get a very audible clacking noise from mid vehicle. Its nasty.
The other day I wheeled around cline butte for a while, once I got back on the highway it wasn't as bad as it has been, almost not there. I didn't try to get it to make the clacking noise tho. The next day the grinding was back.
Im thinking flexplate. The TC bolts where ok but I think ill drop the inspection plate pull the TC bolts out and pry the Flexplate to see if the bolts at the crank are loose, missing, or anything..
Anybody have some info for me?
thanksHasta