need help picking gears!!!!

**440 rwhp trans am** · 05-04-2007, 09:59 AM

hey guys havent been on here for a while but need your help. im ordering the yank 3200 stall today and i wanted to know what gears i should get??? i want to order them today.

**BIG D's SS** · 05-04-2007, 10:04 AM

I would go with 3.73's with an auto. That seems to be the most popular gear ratio.

**SteveC** · 05-04-2007, 10:18 AM

If you have an A4 I would also recommend 3.73's, when I did my calculations, the problem I found with 4.10 (coupled to an A4), is at highway speeds (70MPH +) when agressively hitting the throttle, if the PCM drops the transmission into 2nd gear (vice 3rd), you will be way over red lining the vehicle.

3.73's will spool up the rpm's nicely also, it will be almost like not dropping any RPM on WOT.

SteveC

**Allen Wood** · 05-04-2007, 10:24 AM

3000 Yank and 3:73 in my 99 Z-28

**440 rwhp trans am** · 05-04-2007, 10:28 AM

Originally Posted by Allen Wood

3000 Yank and 3:73 in my 99 Z-28

yeah im going to go with the 3000 instead of the 3200 with the richman 373 gears. was that a night and day deferance for you? yes im an a4 with a stage 3 shift kit and better internals.

**SSpdDmon** · 05-04-2007, 10:36 AM

If you have 3.23's already, I'd consider 3.73's or 3.90's (I think Motive offers those now).

Those who have 2.73's might consider 3.90's, 3.73's, or 3.42's because the move to either one is significant enough to justify the investment.

In the end though, it's more about what you want to do with the car and what kind of tire you will be running. If it's a street car/highway racer, I'd say 3.73s or 3.42s. If it's more of a track car, I'd say 3.90s or 3.73s (or maybe even 4.10s). Just know, 4.10s in an auto can't be tuned for completely. The PCM's limitations won't accept the numbers and as a result, your odometer and speedometer will be off slightly.

**440 rwhp trans am** · 05-04-2007, 10:45 AM

Originally Posted by SSpdDmon

If you have 3.23's already, I'd consider 3.73's or 3.90's (I think Motive offers those now).

Those who have 2.73's might consider 3.90's, 3.73's, or 3.42's because the move to either one is significant enough to justify the investment.

In the end though, it's more about what you want to do with the car and what kind of tire you will be running. If it's a street car/highway racer, I'd say 3.73s or 3.42s. If it's more of a track car, I'd say 3.90s or 3.73s (or maybe even 4.10s). Just know, 4.10s in an auto can't be tuned for completely. The PCM's limitations won't accept the numbers and as a result, your odometer and speedometer will be off slightly.

cool yeah i have 315 g-force on there but i can still spin those for a while if im not on concrete. it will only get worse but the traction is good. for now. any brand you would recomend????

**SSpdDmon** · 05-04-2007, 11:29 AM

Hmmm - recommendations....AAM...I think it stands for American Axle Manufacturers. They are an OEM supplier for GM. There's a guy here in the D who I can hook you up with if you want some more detail. Shoot me a PM if you want his number.

**SteveC** · 05-04-2007, 03:40 PM

Originally Posted by 440 rwhp trans am

yeah im going to go with the 3000 instead of the 3200 with the richman 373 gears. was that a night and day deferance for you? yes im an a4 with a stage 3 shift kit and better internals.

I have a Y3000 with 3.73's too, and if I had to do it all over, I would go with a 3600 stall.

You ALWAYS want more stall after the fact, make it a one time shot, do it right and get a 3600 with 3.73's, you won't be sorry.

If you are putting out as much horsepower as your handle says, you may want to replace the stock flex plate with a TCI SF29 unit, both Jeg's and Summit sells them.

SteveC

**LS1_TA_2002** · 05-05-2007, 10:46 PM

Had 3.23's not enough went to 3.73's perfect just a littles less on the highway MPG, but then again it's F-Body whaddya expect

**LS2Tuner** · 05-06-2007, 12:21 AM

I would go with 3.91s. And if you are looking for the BEST hooking drag radial out there it is the M&H by far. But they also are the softest so they wear quicker. If you go with a pair of Mickey Thompsons they will hook much better than the BFG's.
The your stock flex plate should be just fine if your all motor. We have MANY out there running low 12's high 11's with stock flex plates with NO issues.

**440 rwhp trans am** · 05-06-2007, 11:40 AM

Originally Posted by LS2Tuner

I would go with 3.91s. And if you are looking for the BEST hooking drag radial out there it is the M&H by far. But they also are the softest so they wear quicker. If you go with a pair of Mickey Thompsons they will hook much better than the BFG's.
The your stock flex plate should be just fine if your all motor. We have MANY out there running low 12's high 11's with stock flex plates with NO issues.

how much do the flex plates cost? i plan on running in the 11's hopefully lower 11's i have a few tricks up my sleve. i have worked on my car alot since the 440.

**LS2Tuner** · 05-06-2007, 01:37 PM

Originally Posted by 440 rwhp trans am

how much do the flex plates cost? i plan on running in the 11's hopefully lower 11's i have a few tricks up my sleve. i have worked on my car alot since the 440.

They are $200-260 depending on whos you buy. I've used TCI's and one from Coan that was a very nice.
Pioneer is suposed to come out with one or actually it might be out now if so it will be around $80-100 and yes it will be SFI certified.

**SteveC** · 05-06-2007, 06:11 PM

Originally Posted by 440 rwhp trans am

how much do the flex plates cost? i plan on running in the 11's hopefully lower 11's i have a few tricks up my sleve. i have worked on my car alot since the 440.

I paid $199 for mine. Keep in mind you will need slightly longer bolts to mount the converter due to the thickness of the plate. The TCI units NOW come with the bolts. It is cheap insurance, especially with the HP you will be producing. You need to remove 3 of the six bolts anyway to remove the TC.

SteveC

**Allen Wood** · 05-07-2007, 06:34 AM

Originally Posted by 440 rwhp trans am

yeah im going to go with the 3000 instead of the 3200 with the richman 373 gears. was that a night and day deferance for you? yes im an a4 with a stage 3 shift kit and better internals.

There was a good bit difference going from 3:23 to3:73. Small drop in fuel milage.The car will still get 22 - 23 on the road.

**Hawk241** · 05-07-2007, 07:12 AM

Hey you guys running 3.73's, What are you running at 60mph on the tach?

**SteveC** · 05-07-2007, 07:58 AM

Originally Posted by Allen Wood

There was a good bit difference going from 3:23 to3:73. Small drop in fuel milage.The car will still get 22 - 23 on the road.

Not necessarily true, maybe with the stock converter. You have to take into account the inefficiency of the performance converter.

My Y3000 2.0 STR has a high effeciency rating of 98%, and I am getting 19 mpg. on the highway. Performance converters generally unlock when the brake is applied, and whenever you are out of lockup (i.e. below 43mph, stock tune) you WILL be burning more gasoline due to the slippage. The higher the stall, the more slippage, however the pros out weigh the cons.

SteveC

**440 rwhp trans am** · 05-07-2007, 10:01 AM

Originally Posted by Allen Wood

There was a good bit difference going from 3:23 to3:73. Small drop in fuel milage.The car will still get 22 - 23 on the road.

i would shit mt pants if i got 22-23 on the road. i get more toward the 10-15 but i hardly get on the freeway anymore. when i went with the 30lb injectors i lost all hope of good gas mileage.

**SteveC** · 05-07-2007, 10:15 AM

Originally Posted by Hawk241

Hey you guys running 3.73's, What are you running at 60mph on the tach?

Here is a sight that you can do the calculations:

http://www.f-body.org/gears/

SteveC

**SSpdDmon** · 05-07-2007, 12:05 PM

Originally Posted by 440 rwhp trans am

i would shit mt pants if i got 22-23 on the road. i get more toward the 10-15 but i hardly get on the freeway anymore. when i went with the 30lb injectors i lost all hope of good gas mileage.

I run 30lb SVO injectors and I got 23~24 out of my M6 on my 1300-mile round trip to Delaware.