noticed a strange noise while driving on the highway yesterday...
had the windows down and was passing someone at WOT in 6th... heard a banging/knocking/ticking sound that I thought was coming from the right side, but that might have just been the sound reflecting off the car I was passing...
was able to replicate the sound a few more times... thought maybe exhaust was hitting/banging under the truck? 5" downpipe is kinda tight
pulled over, didn't see anything odd... I had been playing with the wastegate arm earlier in the day thought maybe the wastegate lever was chattering open and closed? or maybe the pop-off valves were bouncing open/shut?
so then I tried to replicate it again with the windows up and it really sounded like it was coming from the tranny area... hmm...
I also noticed that the noise was occuring when I railed on it from 1900 or so and it would rattle around 2000-2100ish and up... and then it would go away...
if I hit it at 2500rpm, it wouldn't do it...
and if I had it happening in the low 2k RPM zone and backed off the throttle a hair, it would go away.
so now I'm thinking it's clutch/driveline related and that it's a torque issue... higher RPM = less torque, no noise... if I'm not at WOT, no noise... less torque...
I'm planning on putting a dual disk in the truck. it currently has an OFE in it... the clutch isn't slipping... wondering if I'm bottoming out the springs in the hub and they're "bouncing" or something?
DDP4's, rips twins w/ a PDR35-12 on top, rack cap is the fuel stop on the 215 pump
already left a message w/ Peter
your thoughts?