What gears do I have?"

[Lawnman]

I have a 98 WS6 with the 17 in . rims . The car is also an a4. At 70 mph my tach reads roughly 2650 rpm's. What gears do I have? Thanks.

[2001NBMZ28]

Stock was either 2.73 (GU2) or 3.23 (GU5) on the drivers side door. Rim size doesn't matter - it's the overall rim/tire diameter that counts...for example no overall diameter difference in 16 or 17 inch rims for stock tires. Assuming the speedo was recalibrated and the speed/RPM are correct sounds like 4.10's to me? Visit www.f-body.org/gears/ and play with the calculator.

[Firebug]

Car in neutral. Jack up one wheel, mark your tail shaft and tyre. Turn tyre exactly one full revolution and count how many times your tailshaft turns.

[Lawnman]

The car has been reprogammed with a hypertech reprogrammer. I do not know if that will make a difference or not.

[sdavis2702]

if you dont know if the car is stock or not just do this...

jack the rear of the car up to where both rear wheels are off of the ground. use GOOD jackstands to hold the car up. make sure the car is in neutral. have one person get UNDER the car and another sit at one of the back wheels. take a piece of chalk or something and mark the driveshaft clearly. have the person at the read wheel spin the wheel ONE FULL ROTATION... so they may wanna mark the tire also to be sure its on ONE FULL TURN. as the wheel turns... count the number of times the driveshaft spins using the chalk mark as a reference. if it spins 2 full times and almost a third... you have 2.73s. if it spins 3 times and starts a 4th... you have 3.23s. and so on...

but if you KNOW the car is stock... use the RPO codes. and this link http://s-series.org/component/option...per/Itemid,41/

the gears begin with GU like 2001NBMZ28 said


EDIT.... holycrap... i just realized Firebug already said that lol... my bad man

[2001NBMZ28]

Or get someone next to you on the highway at 70 MPH, note your RPMs then compare them to the chart. HPP3 will change the MPH, but not the RPMs.

[M6HUGGERSS]

just a guess ....


4:10

[2001NBMZ28]

That's what I'm thinking too - 69MPH = 2600, 72 MPH - 2700. Just can't remember if my old HPP3 would correct for 4.10's, worked great for my 2.73 to 3.42 swap.

[Firebug]

EDIT.... holycrap... i just realized Firebug already said that lol... my bad man

I just gave the summarised version...

[sdavis2702]

I just gave the summarised version...

haha yea i read yours and i was like "wtf? i really need to cut some words out of mine" lol

[Lawnman]

The codes for the car says it is a 3.42. I will jack up the car and check it out this week.

[2001NBMZ28]

3.42 (GU6) on an LS1 A4?

[Lawnman]

Yes , but I will check again to make sure.
The reason that I asked what gears I had was I thought they had been changed.

[Lawnman]

The code says GU5.

[Lawnman]

The codes for the car says it is a 3.42. I will jack up the car and check it out this week.

I meant to type 3.23 not 3.42.

[TheSilverSurfer]

I have 3.23's and I think 65-70 is about 2000 RPM (A4)

[The Scientist]

I'm thinking 3.73. I have 3.42 in an A4 and push just over ~2500 at 75mph and ~3000 at 90mph. Just my 2 cents.