Advice for rear end swap on an LS-1 swapped FD
#1
Junior Member
Thread Starter
Join Date: Dec 2013
Location: Westchester, NY
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Advice for rear end swap on an LS-1 swapped FD
Rear end is shot, stock FD RX-7 3.90. Making about 530 at the wheels, was wondering what people would think would be too tall, and wondering what rear ends would be reccomended. Debating a 3.08 rear gear or a 3.23. I hear a lot of people are using Ford 8.8 rears. Looking to maintain drivability, and get her on the track/auto-x occasionally. Any help would be greatly appreciated.
#4
Senior Member
Presumably F-body T56 trans?
I'm running a 3.55 8.8" behind my 465rwhp LS2 w/ F-body T56, and honestly I'd prefer shorter (numerically higher) gearing, like 3.73. 1st gear is pretty tall, and a cammed engine doesn't do anything good for low-rpm torque... That said, 3.55 worked very well for Texas Mile run
I'm running a 3.55 8.8" behind my 465rwhp LS2 w/ F-body T56, and honestly I'd prefer shorter (numerically higher) gearing, like 3.73. 1st gear is pretty tall, and a cammed engine doesn't do anything good for low-rpm torque... That said, 3.55 worked very well for Texas Mile run
#6
Junior Member
Thread Starter
Join Date: Dec 2013
Location: Westchester, NY
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Presumably F-body T56 trans?
I'm running a 3.55 8.8" behind my 465rwhp LS2 w/ F-body T56, and honestly I'd prefer shorter (numerically higher) gearing, like 3.73. 1st gear is pretty tall, and a cammed engine doesn't do anything good for low-rpm torque... That said, 3.55 worked very well for Texas Mile run
I'm running a 3.55 8.8" behind my 465rwhp LS2 w/ F-body T56, and honestly I'd prefer shorter (numerically higher) gearing, like 3.73. 1st gear is pretty tall, and a cammed engine doesn't do anything good for low-rpm torque... That said, 3.55 worked very well for Texas Mile run
Sorry for the late response, was busy with work and schedule changes. It currently has a 98 F-Body T-56.
I was really considering the 2006.5-2010 Ford Explorer rear end with the 3.55 gears, and going with the Ronin kit to minimize the amount of fab work that would need to be done, and keep from messing with the exhaust.
Has anyone else used that kit specifically, or have any other good recommendations for a kit to use? Not trying to break the bank, but also don't want to skimp either. Thanks for the responses btw!
#7
Senior Member
Finding 3.55 a bit tall around town on the street...
Has anyone else used that kit specifically, or have any other good recommendations for a kit to use? Not trying to break the bank, but also don't want to skimp either. Thanks for the responses btw!
Trending Topics
#8
Junior Member
Thread Starter
Join Date: Dec 2013
Location: Westchester, NY
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
6600rpm, on 25.6" diameter 275/35-18 tires. With 3.73 gears, would have been 6934rpm, approaching 7000rpm rev-limit, but hey, woulda worked!
Finding 3.55 a bit tall around town on the street...
Mine has the Samberg kit. I had some issues with cracks in the old style diff mount "batwings", since replaced them with his newer/much-beefier design. All is well so far...
Finding 3.55 a bit tall around town on the street...
Mine has the Samberg kit. I had some issues with cracks in the old style diff mount "batwings", since replaced them with his newer/much-beefier design. All is well so far...
#9
Senior Member
Also look into the Ronin Speedworks setup. It requires welding but is cheaper and has a LOT more exhaust clearance. It uses the Explorer diff which can be had really cheap(aluminum with two front mounting tabs like the cobra). The Ronin is a better way to go in every respect EXCEPT you have to weld it in to the rear sub frame.
The Samberg requires welding too if you have a 93 car. 94 and 95 have the mount tabs already.
I second the 3.55 gear. 3.23 or lower is just too tall. You cannot do wrong with the 3.55 or 3.73.
The Samberg requires welding too if you have a 93 car. 94 and 95 have the mount tabs already.
I second the 3.55 gear. 3.23 or lower is just too tall. You cannot do wrong with the 3.55 or 3.73.
Thread
Thread Starter
Forum
Replies
Last Post