Hey guys, I have a 1999 Mustang GT that I just purchased. Mods include, K&N cold air intake, throttle body spacer, flowmaster exhaust, BBK headers. Mileage is 175,000
I have a few issues that I have searched for, but I can't seem to find a definite answer. I am having to replace the bushing and put another seal in the output tailshaft on the transmission as its leaking and the driveshaft has some play in it but I have that taken care of myself.
My main issue is vibration while driving and on the throttle, off the throttle its nice and smooth. It only happens over 45 mph. I am hoping its just the play in the drive shaft and a new bushing will repair that. The transmission shifts buttery smooth.
Another issue is the RPM's seem to be a bit high at 65 mph. Its around 2500 / 2600 RPM. Even if its got 4.10's in it, that seems to high. Could the Speedo being off by 5 mph ( 70 on speedo, 65 actual ) that I verified through GPS cause the tach to be off?
I have a few issues that I have searched for, but I can't seem to find a definite answer. I am having to replace the bushing and put another seal in the output tailshaft on the transmission as its leaking and the driveshaft has some play in it but I have that taken care of myself.
My main issue is vibration while driving and on the throttle, off the throttle its nice and smooth. It only happens over 45 mph. I am hoping its just the play in the drive shaft and a new bushing will repair that. The transmission shifts buttery smooth.
Another issue is the RPM's seem to be a bit high at 65 mph. Its around 2500 / 2600 RPM. Even if its got 4.10's in it, that seems to high. Could the Speedo being off by 5 mph ( 70 on speedo, 65 actual ) that I verified through GPS cause the tach to be off?