hpgt

Hey i have a Stock Auto GT i am looking to put on a CAI some new pulleys and gears along with a brenspeed tune. I have been looking around and brenspeed offers 4.1 performace gears 8.8' while i have also seen FRPP 4.10 gears for about 80 bucks more. Is there a big diffrence, any feed back is well apreciated

rshamekh

1. Get a bamachips.com tune for your auto instead of brenspeed.

2. Pay the extra $80 and get the FRPP's so you don't experience gear whine, motives (which bresnpeed have) are known to whine if not installed correctly.

3. Get 3.73 instead of 4.10, because it works better with your auto.

hpgt

K wow thanks that really helps i had no clue and i am new to this so what would be the best tunes to get from bama

rshamekh

The package comes with 3 tunes, I got 87 Performance, 93 Torque, 93 Race.

The performance tune pulls hard at the higher rpm's (3k+) but has less pull than others at lower rpms.
The torque pulls hard down low but then it loses its pull up high.
The race tune kinda combines both and pulls hard all over.

I use the 93 race tune on my car, and it's my daily driver. Some people won't like it as a DD because the shifts are hard.

I only got the 87 incase I couldn't find a gas station with 93 octane, and that happened to me twice, and I just had to load the 87 tune.


One thing to mention, I don't know if you know this or not, but your not gonna be able to install the gears yourself, you have to get them installed at a reputable shop that has experience with ford 8.8" rear axle. Otherwise they would whine (even the FRPP's) but the FRPP's give more room for errors for the installer than the motives.

2k6silvergt

I would go with the frpp gears but I would get the 4.10s especially if you plan on adding more hp down the road (forced induction, nitrous, heads/cams). I had my 4.10s put in before I got my supercharger and exhaust and I loved them. Both Bama and Brenspeed are well-known so I don't think you could go wrong with either.

rshamekh

Bama is known to have the best tunes for Auto's (shift points, etc..).

We're talking about an automatic car, we don't have much control of throttle like manuals, so unless you go with 3.73 or less you'd be spinning all the time. On a manual you could control how fast you let out the clutch and so on to avoid spininng, but on an automatic, all we have is the gas pedal.

I read something that the auto's has a shorter first gear than manuals which makes the makes 3.73's on an auto the same as 4.10's on a manual.

I read here somewhere, that some guys had 3.73's on their auto, and then switched to 4.10's and noticed no difference in ET at the track if not less.

Bottom line, the 3.73's compliment the automatic transmission better than 4.10's, not to mention it's more highway friendly.

Bluestar

+1 on the FRPP 3.73's

PLstang

I like the 3.73's if your going to go F/I

RED121572

Two years ago, I had a local shop install 3.73's in mine. This week, I paid 855 bucks to the local dealer to replace the clutch and shims. That shop that installed the 3.73's two years ago, installed the clutch and shims in the wrong order.

Whatever you decide, make sure you have a dealer do the install or a very reputal shop in your area. It gets expensive when you have to do it twice.

Blue07GT

3.73s are awsome, it's a great all around gear. I still get 23-24 mpg on the highway. All i need now is a bama tune and i'm ready for the track......