new rear end gears
Thread Starter
Heel & Toe
Joined: Aug 2004
Posts: 23
Likes: 0
From: middle of a corn field state of confusion
new rear end gears
ok ive got a 94 lt1 with auto tranny and have been playing with putting in a set of 3.73 gears in the rear i currently have a 3.07 rear end. Has anybody done this and how steetable did it turn out. any help would be greatly appreciated
Team Owner
Joined: Sep 2001
Posts: 62,164
Likes: 1,734
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Lots have done it, it will be very streetable, and 1/4mi times should drop at least ~.3
Slight drop in mileage is to be expected though, especially on the hwy.
Slight drop in mileage is to be expected though, especially on the hwy.
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
If you do much highway driving, you'll miss the mileage. I'd recommend a 24-2600 stall converter first and see if that doesn't give you the punch you're looking for. With the low gear ratio of the 700R/4L60E transmissions, a 3.07 is not that bad of a gear. I'm still running it and have no plans to change it.
Pro
Joined: Sep 2001
Posts: 744
Likes: 2
From: Homestead Florida
I'm not smart enough to figure out the rpms in OD, but i if anyone could post the differences, i think it would be helpful in making a decision on what gear to go with. I know there are other factors to consider but its a start.
Maybe if you could compare rpms a few common mph's. I too like the 3.07 in there now.
RPM
Speed (gear) 2.59 3.07 3.54 3.73 4.1?
35 -RPM- ---- ---- ---- ----
45
55
65
75
85
95
100
110
120
130
140
150
160
170
180
190
200
Maybe if you could compare rpms a few common mph's. I too like the 3.07 in there now.
RPM
Speed (gear) 2.59 3.07 3.54 3.73 4.1?
35 -RPM- ---- ---- ---- ----
45
55
65
75
85
95
100
110
120
130
140
150
160
170
180
190
200
Bench Racer
Joined: Feb 2003
Posts: 4,201
Likes: 15
From: Palm Beach Gardens FL
St. Jude '03 thru 14,'25
Go to th link below, scroll down to GEAR.EXE and download it. It should provide you with the info you need:
http://home.att.net/~jroal/slist.htm
http://home.att.net/~jroal/slist.htm
Originally Posted by torchred96
I'm not smart enough to figure out the rpms in OD, but i if anyone could post the differences, i think it would be helpful in making a decision on what gear to go with. I know there are other factors to consider but its a start.
Maybe if you could compare rpms a few common mph's. I too like the 3.07 in there now.
RPM
Speed (gear) 2.59 3.07 3.54 3.73 4.1?
35 -RPM- ---- ---- ---- ----
45
55
65
75
85
95
100
110
120
130
140
150
160
170
180
190
200
Maybe if you could compare rpms a few common mph's. I too like the 3.07 in there now.
RPM
Speed (gear) 2.59 3.07 3.54 3.73 4.1?
35 -RPM- ---- ---- ---- ----
45
55
65
75
85
95
100
110
120
130
140
150
160
170
180
190
200
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From: Stockholm / Sweden
Bench Racer
Joined: Feb 2003
Posts: 4,201
Likes: 15
From: Palm Beach Gardens FL
St. Jude '03 thru 14,'25
Hmm, it was working at the time I posted... 
.
If your ISP allows files up to 1.5 megs, let me know and I'll email it to you (or anyone else for that matter)...
.If your ISP allows files up to 1.5 megs, let me know and I'll email it to you (or anyone else for that matter)...
Originally Posted by torchred96
thanks the link isn't working for me..anyone else?