Rear End Change - Sanity Check
03-23-2018, 12:21 PM
#21
Le Mans Master
His goal, I assume, is to use only 4 gears and eliminate one shift entirely.
I would definitely hang onto the old rear end for a possible return to stock for future sale!
Last edited by davepl; 03-23-2018 at 12:22 PM.
03-23-2018, 01:57 PM
#22
Le Mans Master
Thread Starter
I think you might be surprised. All of these gears aren't necessary for drag racing... look at how many cars run 2 speed powerglides, and top fuel has no trans whatsoever.
His goal, I assume, is to use only 4 gears and eliminate one shift entirely.
I would definitely hang onto the old rear end for a possible return to stock for future sale!
His goal, I assume, is to use only 4 gears and eliminate one shift entirely.
I would definitely hang onto the old rear end for a possible return to stock for future sale!
03-23-2018, 01:57 PM
#23
Le Mans Master
Thread Starter
03-23-2018, 05:24 PM
#24
Burning Brakes
I had the same question also a 2.73 is probably too tall for my measly 700rw
I swapped the 3.73 in 2 of my ctsv's to 3.23 and loved the taller gearing. Car would do 95'ish in 2nd gear!
I really really really hate the 4-5 shift at half mile events. I'd still love a way to just lock out 7th so i can get push hard right and up to hit 5th. I put the stock shifter in and that seemed to help. Nailing that sweet spot to 5th with the mgw was just too hard for me. The centering spring was too strong so i would always push too hard to the right and hit 7th. Must just be my massive arm muscles :p
I swapped the 3.73 in 2 of my ctsv's to 3.23 and loved the taller gearing. Car would do 95'ish in 2nd gear!
I really really really hate the 4-5 shift at half mile events. I'd still love a way to just lock out 7th so i can get push hard right and up to hit 5th. I put the stock shifter in and that seemed to help. Nailing that sweet spot to 5th with the mgw was just too hard for me. The centering spring was too strong so i would always push too hard to the right and hit 7th. Must just be my massive arm muscles :p
Last edited by 555ctsv; 03-23-2018 at 05:29 PM.
03-23-2018, 07:29 PM
#25
Le Mans Master
Thread Starter
I had the same question also a 2.73 is probably too tall for my measly 700rw
I swapped the 3.73 in 2 of my ctsv's to 3.23 and loved the taller gearing. Car would do 95'ish in 2nd gear!
I really really really hate the 4-5 shift at half mile events. I'd still love a way to just lock out 7th so i can get push hard right and up to hit 5th. I put the stock shifter in and that seemed to help. Nailing that sweet spot to 5th with the mgw was just too hard for me. The centering spring was too strong so i would always push too hard to the right and hit 7th. Must just be my massive arm muscles :p
I swapped the 3.73 in 2 of my ctsv's to 3.23 and loved the taller gearing. Car would do 95'ish in 2nd gear!
I really really really hate the 4-5 shift at half mile events. I'd still love a way to just lock out 7th so i can get push hard right and up to hit 5th. I put the stock shifter in and that seemed to help. Nailing that sweet spot to 5th with the mgw was just too hard for me. The centering spring was too strong so i would always push too hard to the right and hit 7th. Must just be my massive arm muscles :p
my car probably has 20 half mile passes on it and I bet I went from 4th to 7th on 10 of them. I’m sick of it. I’m not coming out of 4th come hell or high water.
03-23-2018, 11:57 PM
#26
Drifting
I have also been considering changing from the 3.42 to 2.73.
I have made 5 passes at the mile (at this power level) and my car has to stay in 5th way too long (stock gearing 3.42).
With the 345/30/19 Toyo R888R along with the 2.73 rear end the car should run over 200 MPH at 6,800 rpm in fourth gear. (M7)
The best I have ran so far is 184.6 mph (mile) 157.1 (1/2) this is starting off in 2nd gear. Not making excuses here but there was a pretty good head wind and high DA.
I currently make 767 RWHP.
BTW I also hate the 4-5 shift and I have also went 4-7 a few times as well.
I have made 5 passes at the mile (at this power level) and my car has to stay in 5th way too long (stock gearing 3.42).
With the 345/30/19 Toyo R888R along with the 2.73 rear end the car should run over 200 MPH at 6,800 rpm in fourth gear. (M7)
The best I have ran so far is 184.6 mph (mile) 157.1 (1/2) this is starting off in 2nd gear. Not making excuses here but there was a pretty good head wind and high DA.
I currently make 767 RWHP.
BTW I also hate the 4-5 shift and I have also went 4-7 a few times as well.
03-24-2018, 01:00 AM
#27
Burning Brakes
I was going to do the exact same thing with my m7, but the gears will be way too long, specially if your car is a z51 your 4th gear will never end, best gearing you can do for a half mile is a 3.10 but that not available yet.
Check this site and put your gears and tire diameter,
http://www.wallaceracing.com/gear-speed.php
Good luck,
Check this site and put your gears and tire diameter,
http://www.wallaceracing.com/gear-speed.php
Good luck,
03-24-2018, 04:58 AM
#28
I'm Batman..
Pro Mechanic
Member Since: Apr 2014
Location: Lehigh Acres FL
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Tech Contributor
I was going to do the exact same thing with my m7, but the gears will be way too long, specially if your car is a z51 your 4th gear will never end, best gearing you can do for a half mile is a 3.10 but that not available yet.
Check this site and put your gears and tire diameter,
http://www.wallaceracing.com/gear-speed.php
Good luck,
Check this site and put your gears and tire diameter,
http://www.wallaceracing.com/gear-speed.php
Good luck,
03-24-2018, 08:58 AM
#29
Le Mans Master
Thread Starter
I was going to do the exact same thing with my m7, but the gears will be way too long, specially if your car is a z51 your 4th gear will never end, best gearing you can do for a half mile is a 3.10 but that not available yet.
Check this site and put your gears and tire diameter,
http://www.wallaceracing.com/gear-speed.php
Good luck,
Check this site and put your gears and tire diameter,
http://www.wallaceracing.com/gear-speed.php
Good luck,
Haha. That is exactly my goal. For 4th gear to NEVER end!
03-24-2018, 09:31 AM
#30
Team Owner
Member Since: Jan 2007
Location: cookeville tennessee
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Should work out great with it. Plus if a little off on the gearing the next set of rear tires he can also go up are down with it. Robert
Last edited by robert miller; 03-24-2018 at 09:35 AM.
03-24-2018, 09:37 AM
#31
Le Mans Master
Thread Starter
We're going to find out! My goal is to get the M7 1/2 mile record.
03-24-2018, 01:55 PM
#32
Race Director
I think you might be surprised. All of these gears aren't necessary for drag racing... look at how many cars run 2 speed powerglides, and top fuel has no trans whatsoever.
His goal, I assume, is to use only 4 gears and eliminate one shift entirely.
I would definitely hang onto the old rear end for a possible return to stock for future sale!
His goal, I assume, is to use only 4 gears and eliminate one shift entirely.
I would definitely hang onto the old rear end for a possible return to stock for future sale!
03-25-2018, 01:25 AM
#33
I have been contemplating a 3.42 swap also on my GS but do not want to give up the eLSD, or cooling etc. Any advice? Possibly a manual 3.42 Z06 swap? Still trying to research. I want to increase my 5th gear performance for 1/4 mile stuff
03-25-2018, 02:22 AM
#35
03-25-2018, 10:21 PM
#40
Burning Brakes