Gear and mod question
Thread Starter
Launching!
Joined: Apr 2009
Posts: 252
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Gear and mod question Ok my 98 Z has 2.73 gears in it. All the places here are saying I have to change my carrier to put 3.73 gears in it. Is that right? Also what are some good mods to do to the car? Im thinking about a SLP lid box. Is that a good start?
TECH Senior Member
Joined: Dec 2001
Posts: 5,399
Likes: 3
From: Jacksonville, FL
You can get aftermarket gears for the 2 series carrier. Make sure that's what's in there, mine came with 2.73's so GU2 is on the door - but replaced the entire rear with a M6 3.42 car. A lid is a good place to start.
Thread Starter
Launching!
Joined: Apr 2009
Posts: 252
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I found a good one out of a 6 spd car for 120.00. Is that a good deal?
TECH Senior Member
Joined: Dec 2001
Posts: 5,399
Likes: 3
From: Jacksonville, FL
Do you know where it came from? Might be as long as it wasn't abused. I got mine from someone I knew who was upgrading to a 12 bolt. Something else to consider when swapping is whether your/donor car have ASR/TCS or not - ASR/TCS are 4 channel ABS, non ASR/TCS cars are 3 channel and only have one sensor on top of the pumpkin, traction control cars have sensors at each rear wheel.
Here's a little list of all the "bolt on" mods you can do since you were asking about the lid.
CAI ($200) [Fast Toys Ram Air]
Filter ($62) [K&N Air Filter]
Lid ($90) [Slp]
Maf ($176) [Slp]
Bellow ($62) [Slp]
Ported TB ($65) [Spartan Performance]
Intake Manifold ($450-$750) [LS6 or FAST]
Long Tubes/ Y-pipe ($500-$1350) [Pacesetter or American Racing]
Cat Back ($450-$1,000) [Magnaflow or Corsa]
Underdrive Pulley ($200) [ASP or Slp]
1.85 Rocker Arm Kit ($1,000) [Comp Cams or SLP]
Push Rods ($125) [Slp]
Electric Water Pump ($650) [Meziere]
Gears/ Install Kit ($375) [Slp]
160 Degree Thermostat ($54) [Slp]
Dyno Tune ($450) [Performance Shop]
Total = $4900-$6600
CAI ($200) [Fast Toys Ram Air]
Filter ($62) [K&N Air Filter]
Lid ($90) [Slp]
Maf ($176) [Slp]
Bellow ($62) [Slp]
Ported TB ($65) [Spartan Performance]
Intake Manifold ($450-$750) [LS6 or FAST]
Long Tubes/ Y-pipe ($500-$1350) [Pacesetter or American Racing]
Cat Back ($450-$1,000) [Magnaflow or Corsa]
Underdrive Pulley ($200) [ASP or Slp]
1.85 Rocker Arm Kit ($1,000) [Comp Cams or SLP]
Push Rods ($125) [Slp]
Electric Water Pump ($650) [Meziere]
Gears/ Install Kit ($375) [Slp]
160 Degree Thermostat ($54) [Slp]
Dyno Tune ($450) [Performance Shop]
Total = $4900-$6600
Thread Starter
Launching!
Joined: Apr 2009
Posts: 252
Likes: 1
Do you know where it came from? Might be as long as it wasn't abused. I got mine from someone I knew who was upgrading to a 12 bolt. Something else to consider when swapping is whether your/donor car have ASR/TCS or not - ASR/TCS are 4 channel ABS, non ASR/TCS cars are 3 channel and only have one sensor on top of the pumpkin, traction control cars have sensors at each rear wheel.
Thread Starter
Launching!
Joined: Apr 2009
Posts: 252
Likes: 1
Here's a little list of all the "bolt on" mods you can do since you were asking about the lid.
CAI ($200) [Fast Toys Ram Air]
Filter ($62) [K&N Air Filter]
Lid ($90) [Slp]
Maf ($176) [Slp]
Bellow ($62) [Slp]
Ported TB ($65) [Spartan Performance]
Intake Manifold ($450-$750) [LS6 or FAST]
Long Tubes/ Y-pipe ($500-$1350) [Pacesetter or American Racing]
Cat Back ($450-$1,000) [Magnaflow or Corsa]
Underdrive Pulley ($200) [ASP or Slp]
1.85 Rocker Arm Kit ($1,000) [Comp Cams or SLP]
Push Rods ($125) [Slp]
Electric Water Pump ($650) [Meziere]
Gears/ Install Kit ($375) [Slp]
160 Degree Thermostat ($54) [Slp]
Dyno Tune ($450) [Performance Shop]
Total = $4900-$6600
CAI ($200) [Fast Toys Ram Air]
Filter ($62) [K&N Air Filter]
Lid ($90) [Slp]
Maf ($176) [Slp]
Bellow ($62) [Slp]
Ported TB ($65) [Spartan Performance]
Intake Manifold ($450-$750) [LS6 or FAST]
Long Tubes/ Y-pipe ($500-$1350) [Pacesetter or American Racing]
Cat Back ($450-$1,000) [Magnaflow or Corsa]
Underdrive Pulley ($200) [ASP or Slp]
1.85 Rocker Arm Kit ($1,000) [Comp Cams or SLP]
Push Rods ($125) [Slp]
Electric Water Pump ($650) [Meziere]
Gears/ Install Kit ($375) [Slp]
160 Degree Thermostat ($54) [Slp]
Dyno Tune ($450) [Performance Shop]
Total = $4900-$6600
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From: Turnin' Wrenches Infractions: 005
Thread Starter
Launching!
Joined: Apr 2009
Posts: 252
Likes: 1
Thread Starter
Launching!
Joined: Apr 2009
Posts: 252
Likes: 1
ok Im ordering one today. But I really need to know if I dont change my carrier and buy gears for the one I have now, will they whine even if there set up right? Sorry Im really new to LS1's Ive been into Foxbodies for the last decade 
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
you need to do some reading in the gears/axles section, lots of good info there. the quietest and most forgiving gears are GM aka SLP aka AAM. (all the same). Motive's are a bit stronger and some people have had noise but most haven't, so far i have had great luck. Richmond's are known to be the strongest and loudest. if you have 2.73s in your car now then 3.73s will be a huge eye opener and order the 2 series 3.73. its a bit thicker gear then the 3 series. basically the same just the thickness is different.