For those of you reading this that don't know, I have 4.10's in my car...much more fun than the stock 3.08's....but man, where did my gas mileage go? (not that bad still getting 380 miles to a tank on trips where I'm not in the loud pedal constantly)
Ok, so this weekend I went to Earlville, IA (about 20 minutes west of Dubuque) for the Iowa GTP club vs. Iowa SC club clash. On the way there we descided to have some fun (on the way back too, but the trip there is what got me concerend). On the way down since there was little to no traffic we descided to see what the cars had in them. At about 100, I start to hear reverberation from the gears...110 there is a fairly constant drone, but I can still hear my exhaust....120 it's no longer reverberation but a constant wir, can still hear exhaust...by 130 you can't even hear the exhaust anymore from inside the car and when I blew past the Thunderbird that was following me down (He made a blast past me first so I had a little catching up to do }( ) he said he wasn't sure if the gears or the exhaust was louder....this has me slightly concerned, but maybe it's normal for such a steep gear ratio? Could this be due to the poly diff mounts and a shot rear diff isolator (the nifty ruber mount on the back of the case)? I have plans to upgrade that rather soon thank goodness.
Not that I'd usually condone this type of activity, but I like to find problems in my car before I start doing things to make it go faster....and I just want to make sure this isn't going to cause any future problems. I probably would have run it up higher, but the noise did concern me.
Ok, so this weekend I went to Earlville, IA (about 20 minutes west of Dubuque) for the Iowa GTP club vs. Iowa SC club clash. On the way there we descided to have some fun (on the way back too, but the trip there is what got me concerend). On the way down since there was little to no traffic we descided to see what the cars had in them. At about 100, I start to hear reverberation from the gears...110 there is a fairly constant drone, but I can still hear my exhaust....120 it's no longer reverberation but a constant wir, can still hear exhaust...by 130 you can't even hear the exhaust anymore from inside the car and when I blew past the Thunderbird that was following me down (He made a blast past me first so I had a little catching up to do }( ) he said he wasn't sure if the gears or the exhaust was louder....this has me slightly concerned, but maybe it's normal for such a steep gear ratio? Could this be due to the poly diff mounts and a shot rear diff isolator (the nifty ruber mount on the back of the case)? I have plans to upgrade that rather soon thank goodness.
Not that I'd usually condone this type of activity, but I like to find problems in my car before I start doing things to make it go faster....and I just want to make sure this isn't going to cause any future problems. I probably would have run it up higher, but the noise did concern me.
