Hi folks,
I'm building a nine-inch rear this winter and would love feedback from folks who've done this swap on how to spec it out. I haven't decided on a vendor yet, but I'll be ordering a drum-to-drum setup and selling my current rear complete.
I'll be launching off a transbrake (4L80E is going in at the same time as the rear) and will be running high nines, but would like to build the rear to last deep into the nines. Would love your feedback on a couple of areas:
Differential
Axles
Gears
Brakes
Other
I'm building a nine-inch rear this winter and would love feedback from folks who've done this swap on how to spec it out. I haven't decided on a vendor yet, but I'll be ordering a drum-to-drum setup and selling my current rear complete.
I'll be launching off a transbrake (4L80E is going in at the same time as the rear) and will be running high nines, but would like to build the rear to last deep into the nines. Would love your feedback on a couple of areas:
Differential
- I drive to the local dragstrips and don't want a spool-- is a Detroit locker going to be my best bet?
- What other options would you consider? I'm assuming none of the Eaton / Auburn posis can hold up.
Axles
- Do I need 35 spline axles for my application?
- Is the weight savings from gun drilled axles worth the cost?
Gears
- Given that I'll be running a 4L80E, what gear ratio would you go with and why?
Brakes
- Disc or drum? Discs are considerably lighter and stop better from speed, but I do still want some ability to hold boost at the light for events that don't allow transbrakes. Can any of the disc brake setups hold boost at the line? The cost difference between disc and drums isn't much when ordering drum-to-drum rear.
Other
- What else haven't I thought about that I should? (for example, a custom driveshaft is on my trans to-do list)