TRE - Taller 5th Gear - Page 2

**Shane@DBPerformance** · 09-28-2006

What is the RPM difference with the TRE 5th gear while crusing at around 70mph on the freeway?

Shotgun! · 09-28-2006

I thought they used to say it was 10%. I would love to dig for facts, but I have dialup.

95talonracer · 09-28-2006

It says that it is around an 8% taller 5th gear so to my understanding at 3000 rpm of a normal 5th gear this one will rev at 2760RPM. An average of 27-30 MPG. Its worth it. It is only $150. If you were to drive 100 miles a day and got 22 MPG now, then if you got the taller 5th gear you would get say 29 MPG average. That is 7 MPG more. You would save roughly $6 a day. That means in 25 days of driving you will pay for the gear itself and after that you are just saving even more money for additional parts for your car and not gas.

**Goat Blower** · 09-28-2006

If you want to save gas, get a Prius. You can even get VFAQ tips from Tom Stangl for them now. The old DSM'rs have gone to the gay side.

**Shane@DBPerformance** · 09-28-2006

I don't think your gas mileage is going to go up 7mpg. I currently get 27mpg with the AWD Talon. I would consider 1-2 mpg a decent gain. The car vibrates pretty bad at 80mph with the RPMs at 3500+.

iceminion · 09-28-2006

although I dont expect 30 MPG, any increase would be awesome, the larger problem is the high RPMs on the freeway, its loud and annoying.

Anyone who is having their tranny cracked open would be wise to opt for the taller 5th gear.

Under TRE's "Genuine Mitsu Parts" page, they list the gear itself for $220, If it is a mitsu part, shouldnt it be available through brookdale mitsu?

http://www.teamrip.com/GENUINE_FACTORY_AWD_PARTS.html

Its about 1/3 way down the page.

**Kracka** · 09-28-2006

Do it yourself then, its really not too tough, just take it slow and label everything.

**JET** · 09-30-2006

The drive shaft comes off with the T-case, just 17mm bolts and the same size is used on the suspension (if it's a 1g, you don't say).

Thor06 · 09-30-2006

Going from 3000 to 2760 would never yeild 7 mpg increase. I cannot imagine that it would really affect your milage more than 1 mpg, thats only a 250 rpm difference at 3000 rpms. Completely not worth it IMO.

Andrew7dg · 09-30-2006

Quote:

Originally Posted by Thor06

Going from 3000 to 2760 would never yeild 7 mpg increase. I cannot imagine that it would really affect your milage more than 1 mpg, thats only a 250 rpm difference at 3000 rpms. Completely not worth it IMO.

I think it depends on how the car is setup. If it is made for high revs and dogs in the lower RPM then no, but if it is a 2.3L stroker then a taller gear would be ideal.
It also wouldn't be worth it if the car is making stock HP i would think. I would think the engineers would have put the 5th gear in the most efficient range. In this club though most cars are making good HP so that would throw off the calculations.

I would love to see a data log of a before and after the gear installation to see how the car is running. To measure by tank there are a lot of variables. I have had my car running in the 27 all the way down to 21 on highway depending how I am driving

**Shane@DBPerformance** · 10-01-2006

What year is the car? You don't have to support the engine if it's a 1G.

ExTREME · 10-01-2006

Sorry, it is a 1g. 93tsi.

I forgot to add I also took out the exhaust.

95talonracer · 10-04-2006

Tested my new 5th gear at 70MPH today and it revs ay 2650 even. Alot nicer drive at that speed then before.

**Shane@DBPerformance** · 10-05-2006

Are you AWD?

**Goat Blower** · 10-05-2006

That's quite a drop if it's AWD.

niterydr · 10-05-2006

My advice is no good, please delete.

95talonracer · 10-05-2006

No it is fwd but same results for awd according to tre. This gear is awsome. It just coasts now instead of wining out. Well i guess it isnt that dramatic but still. For 150 it is all worth is on everything.

**Shane@DBPerformance** · 10-05-2006

FWDs are geared longer than AWDs to begin with. I am at almost 4000RPMs if I try to cruise at 80mph.

95talonracer · 03-28-2007

I have had this TRE tranny in now and put over 1000 miles on it. It is great so far and the 5th gear seams to help quite a bit being that it revs out less on the road just driving along.

Has anyone else gone this route as well yet?

Swifty1638 · 03-28-2007

I've wanted to do a taller 5th gear when I eventually do a built tranny. I'd think that yea, with only 1-2 mpg better, it would be less stress on the motor at a lower rpm, and with that improved mpg, the gear would end up paying for itself in like...20k miles or something-assuming your car lasts that long.

-A. Swift