WSUHottBOI

iTrader: (1)

I have a 98 trans am a4 with a shift kit, longtubes, slp lid, new spark plugs and wires and stock gears. When im going 60mph my rpm is at 2000RPM and a buddy of mines has a 99 ss with the same mods but he has 373 gears and gets the same at 60mph and at 70mph. At 70mph im at 2500RPM.

So my question is, is this normal for my car and is it possible I might have gears done to my car?

dabest09

iTrader: (1)

So what's your question?

usnfenix

iTrader: (11)

not really. with an a4 you can cruise at 60 at a wide variety of rpm.

Ironembraced

Have you been tuned at all?

01ssreda4

iTrader: (96)

2k at 60mph indicates 3.73s are highly likely. Either that or your converter isn't locking on the hwy.

usafws6

iTrader: (10)

jack up the rear spin one a complete revolution and count the number of times the driveshaft turns 3 3/4 turns =3.73. any less and you might have torque converter issues

blk/slvr02ss

iTrader: (21)

Seems to be higher than normal to me ! I had 3:23's in all my ls-1 cars and @70 im @ just under 2000 rpm's !

S8ER95Z

iTrader: (3)

Http://f-body.org/gears


Should help you a little bit.

WSUHottBOI

iTrader: (1)

According to that site I should be at 68mph at 2000RPM with my stock gears...Im jus going to do what USAFWS6 said..Thanks for the help..

S8ER95Z

iTrader: (3)

Yeah if you change the gears and generate a new list you can see what it would be with different gears, 3.73 gave me 2400rpm @ 70mph and 2000rpm @ 60mph. Pretty safe bet that's what you have.

usafws6

iTrader: (10)

no problem its a foolproof old school method.