hunter_t

Is there a 6 speed trans out there that will bolt up to the l28e? I have an 82 280zx na and I feel like I need the extra gear for highway travel. I will be doing the speed limit, which is 70, and my tach reads 4k rpm. If there isn't a 6 speed that will work, then how can I lower my rpm on the highway?

zxguy1986

Hey, just lurking for this post - but 4K seems high for 5th gear at 70MPH. I have little to no experience with 280s. I think my Z31 does 70MPH at under 3K, could be wrong....

(Edit: Just checked it out today. My '86T does a steady 70 at 2600 RPM.)

So my question is did you switch something out or was your 280 factory-geared to run that high - in 5th? Thanks for the info!

evandubya

It should be around 2500, no where near 4000.

zxguy1986

Thought so, Evan. So Hunter, am wondering if your tachometer/cable set-up is out of whack. Even if your exhaust is 100% good - that Z would probably seem to be screaming at 4K. So, are you sure about the cause of your RPM-tachometer problem?

(Very cool link below, Nismo!)

NismoPick

4k in 5th gear you'd be going ~102mph:

Transmission Calculator - Z Design Studio

mikey280zx

I find my 5 spd a great trans w/ close match of gearing. My car is needing shifter bushing. I haven't tried slammin any gears as I don't know if it will slide into that gear or hang up Soon come.

Switchtr3

Yeah, this. I use my tach as a half-assed speedometer cause the real one is firmly planted at 0mph. I borrowed a GPS once and memorized a few important speeds (45, 70, 100) and 100mph was pretty much exactly at 4k

WildmaN

Yep, at 70 in 5th my '82 is just below 3k. At 3k it's between 75-80. So I would agree that 100 would be 4k. Of course my needle is a little loose causing it to jump all over, so I use my K.I.T.T. speedometer app and it works quite well.