3.9 final drive
#17
01-12-2006, 07:44 PM
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#18
01-12-2006, 07:58 PM
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When I had purchased my 3.9 final drive Z1 motorsports came out with a gear set for almost half the price, so I returned my gear set to Performance Nissan and am awaiting shipment from Z1 motorsports. I was quoted $200.00 for the gears to be swapped, however, I would have to have someone pull the pumpkin out. I would guess its a $400.00 install job in total.
#19
01-12-2006, 08:21 PM
Originally Posted by kegudi
When I had purchased my 3.9 final drive Z1 motorsports came out with a gear set for almost half the price, so I returned my gear set to Performance Nissan and am awaiting shipment from Z1 motorsports. I was quoted $200.00 for the gears to be swapped, however, I would have to have someone pull the pumpkin out. I would guess its a $400.00 install job in total.
Imho, not really worth it. I went from 3.3X to 3.73s on my mustang, made a *little* difference, not that much. You need atleast 4.10+ if you're going to do gearing for it to be worth it $$$$ wise
plus don't forget your speedo will be off about 18% unless you get the ECU reflashed properly. (or does the G use a speedo gear still, in that case u have to also swap the speedo gear)
#21
01-12-2006, 10:12 PM
Originally Posted by chilibowl
Wrong, the speedo in our cars is measured thru different means so it will not affect your speedo.
#22
01-12-2006, 10:42 PM
#23
01-12-2006, 11:23 PM
Originally Posted by ISMSOLUTIONS
I'm tellin' you all - search my name and check out the threads - VERY MUCH DETAIL there...
I love 'em and LOTS OF GAINS on our AT cars...MT only get about 10%...AT's see 20%....you just loose your cruise control.
I love 'em and LOTS OF GAINS on our AT cars...MT only get about 10%...AT's see 20%....you just loose your cruise control.
my old mustang's tranny was built up pretty nice - 2800 pi-stallion torque converter, 3.73 gearing, transgo set on race setting - and there wasn't any 20% increase in it. Rev'd a bit faster from the gearing, and definately shifted hella harder, but not 20% faster.
#24
01-12-2006, 11:55 PM
Originally Posted by 99atlantic
20% A/T gain, lmao, somebody's overly infatuated with them.
my old mustang's tranny was built up pretty nice - 2800 pi-stallion torque converter, 3.73 gearing, transgo set on race setting - and there wasn't any 20% increase in it. Rev'd a bit faster from the gearing, and definately shifted hella harder, but not 20% faster.
my old mustang's tranny was built up pretty nice - 2800 pi-stallion torque converter, 3.73 gearing, transgo set on race setting - and there wasn't any 20% increase in it. Rev'd a bit faster from the gearing, and definately shifted hella harder, but not 20% faster.
NOT 20% FASTER - DID I SAY THAT???????? NO>>>>>>>>
The MT's get a 10% over stock ratio (FROM THE 3.5 gears in them) and the AT's get a 20% over stock ratio FROM THE 3.3 gears in them) - the gain for the money makes far more sense for an AT than the MT - but both make a difference - depending on what you use the car for as well.
If you're FI - you may not want the 3.9's and you may actually want the AT set...for NA only - go for it!
Overly infatuated - L _M _A _O now!!!
Oh yea - your Mustang should have had a 3200-3500 stall converter in it and 4.10 gears! Mine had 5.13's and 671 blower...rocked the pavement loose!
#25
01-13-2006, 12:49 AM
[QUOTE=99atlantic]$400 for a gear install on a G? haha, good luck - it was $500 to install them on my mustang, G would be a lot harder.
Imho, not really worth it. I went from 3.3X to 3.73s on my mustang, made a *little* difference, not that much. You need atleast 4.10+ if you're going to do gearing for it to be worth it $$$$ wise
Did the 3.73 swap from the stock 3.55 on my 2000 Mustang GT 5sp, and while the change isn't all that for drag racing, it made a huge difference at the track, 3rd and 4th pulled great and i picked up more torque in 1st and 2nd, so it was great for tight turns.
I'd like to do the 3.9 swap in my 03 5AT G Coupe, but i am going to wait for someone here to get it done and let us know how it works out, save the money for other mods.
Imho, not really worth it. I went from 3.3X to 3.73s on my mustang, made a *little* difference, not that much. You need atleast 4.10+ if you're going to do gearing for it to be worth it $$$$ wise
Did the 3.73 swap from the stock 3.55 on my 2000 Mustang GT 5sp, and while the change isn't all that for drag racing, it made a huge difference at the track, 3rd and 4th pulled great and i picked up more torque in 1st and 2nd, so it was great for tight turns.
I'd like to do the 3.9 swap in my 03 5AT G Coupe, but i am going to wait for someone here to get it done and let us know how it works out, save the money for other mods.
#26
01-13-2006, 12:53 AM
[QUOTE=MikeVG]
I have....the reason I am 'for' the mod...read my posts....
Originally Posted by 99atlantic
$400 for a gear install on a G? haha, good luck - it was $500 to install them on my mustang, G would be a lot harder.
Imho, not really worth it. I went from 3.3X to 3.73s on my mustang, made a *little* difference, not that much. You need atleast 4.10+ if you're going to do gearing for it to be worth it $$$$ wise
Did the 3.73 swap from the stock 3.55 on my 2000 Mustang GT 5sp, and while the change isn't all that for drag racing, it made a huge difference at the track, 3rd and 4th pulled great and i picked up more torque in 1st and 2nd, so it was great for tight turns.
I'd like to do the 3.9 swap in my 03 5AT G Coupe, but i am going to wait for someone here to get it done and let us know how it works out, save the money for other mods.
Imho, not really worth it. I went from 3.3X to 3.73s on my mustang, made a *little* difference, not that much. You need atleast 4.10+ if you're going to do gearing for it to be worth it $$$$ wise
Did the 3.73 swap from the stock 3.55 on my 2000 Mustang GT 5sp, and while the change isn't all that for drag racing, it made a huge difference at the track, 3rd and 4th pulled great and i picked up more torque in 1st and 2nd, so it was great for tight turns.
I'd like to do the 3.9 swap in my 03 5AT G Coupe, but i am going to wait for someone here to get it done and let us know how it works out, save the money for other mods.
#27
01-13-2006, 11:38 AM
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Speedo will not be affected by this mod. Speed is sampled from the rear wheel sensors after the gearing and by rotational means. If your speedo was off after a tire change, then you must've went with a smaller diameter tire, which threw off the rotational calibration. In other words, you increased or decreased the number of wheel revolutions by changing the tire size. The 3.9 gear does not affect wheel size and goes on before speed sampling.
A popular mod in conjunction with the gear is the TS ECU to get the redline increased to 7100 rpm. You will get back your top speed and actually better speed for each gear i.e. 2nd gear will end at 62 mph with the ECU instead of 60 mph in stock form.
A popular mod in conjunction with the gear is the TS ECU to get the redline increased to 7100 rpm. You will get back your top speed and actually better speed for each gear i.e. 2nd gear will end at 62 mph with the ECU instead of 60 mph in stock form.
#28
01-13-2006, 12:03 PM
Originally Posted by Deang35c6
Speedo will not be affected by this mod. Speed is sampled from the rear wheel sensors after the gearing and by rotational means. If your speedo was off after a tire change, then you must've went with a smaller diameter tire, which threw off the rotational calibration. In other words, you increased or decreased the number of wheel revolutions by changing the tire size. The 3.9 gear does not affect wheel size and goes on before speed sampling.
A popular mod in conjunction with the gear is the TS ECU to get the redline increased to 7100 rpm. You will get back your top speed and actually better speed for each gear i.e. 2nd gear will end at 62 mph with the ECU instead of 60 mph in stock form.
A popular mod in conjunction with the gear is the TS ECU to get the redline increased to 7100 rpm. You will get back your top speed and actually better speed for each gear i.e. 2nd gear will end at 62 mph with the ECU instead of 60 mph in stock form.
Adding a Torque converter and shift kit helps greatly too!
#29
01-13-2006, 04:18 PM
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QUOTE (Originally Posted by 99atlantic)
"$400 for a gear install on a G? haha, good luck - it was $500 to install them on my mustang, G would be a lot harder.
Imho, not really worth it. I went from 3.3X to 3.73s on my mustang, made a *little* difference, not that much. You need atleast 4.10+ if you're going to do gearing for it to be worth it $$$$ wise
plus don't forget your speedo will be off about 18% unless you get the ECU reflashed properly. (or does the G use a speedo gear still, in that case u have to also swap the speedo gear)"
Performance Nissan quoted $200.00 to remove the pumpkin and reinstall after the gearing was switched.
Performance gearing quoted $200.00 to change the differential.
Total $400.00. You payed too much for your Mustang's gears. That can be done for $250.00.
"$400 for a gear install on a G? haha, good luck - it was $500 to install them on my mustang, G would be a lot harder.
Imho, not really worth it. I went from 3.3X to 3.73s on my mustang, made a *little* difference, not that much. You need atleast 4.10+ if you're going to do gearing for it to be worth it $$$$ wise
plus don't forget your speedo will be off about 18% unless you get the ECU reflashed properly. (or does the G use a speedo gear still, in that case u have to also swap the speedo gear)"
Performance Nissan quoted $200.00 to remove the pumpkin and reinstall after the gearing was switched.
Performance gearing quoted $200.00 to change the differential.
Total $400.00. You payed too much for your Mustang's gears. That can be done for $250.00.
#30
01-13-2006, 08:14 PM
The gearing is really only helping you in accelerating form a stop. When accelerating from an existing speed the advantage can be with either the stock gearing or the 3.9 depending on the speed. If the guy with the stock gearing can start accelerating in 2nd when the guy with the 3.9 is stuck in 3rd, the guy with stock gearing is going to "win".
Basically if you're not just interested in the acceleration of your car from a dead stop, big gearing changes aren't worth it, IMO.
Basically if you're not just interested in the acceleration of your car from a dead stop, big gearing changes aren't worth it, IMO.