280ZX vs 280ZX 2+2 transmissions

[7tooZ]

Is the transmission in a 2+2 the same as the 2 seater? Cant file a chart that differentiates them?

[SteveJ]

The sources I found give the same transmission gear ratios, but the differentials are different.

http://www.zhome.com/ZCMnL/tech/GearRatios.html

[7tooZ]

Thx anyone else know if the is differences?


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[zKars]

Other than then 82/83 turbo's that got that silly BW 5 speed, all the NA cars have the same transmission within their years. The ratios in the first couple of years are different than the later ratio's, most notably the over drive. 82-83 5 speeds are the sweet spot all around.

[7tooZ]

Thx. Just trying to confirm before committing to purchase


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[Terrapin Z]

The clutch is bigger (240mm / 225mm) on the 2+2, but that really has no effect on the transmission itself. 

 

[7tooZ]

4 hours ago, zKars said:

Other than then 82/83 turbo's that got that silly BW 5 speed, all the NA cars have the same transmission within their years. The ratios in the first couple of years are different than the later ratio's, most notably the over drive. 82-83 5 speeds are the sweet spot all around.

My understanding is that the percent variance between 79-80 and the 7/80- 6/83 is only 3%. Doesn't seem like, it would make a big enough difference in front of a 3.70 diff, to the extra cost to find one.

[7tooZ]

2 hours ago, Terrapin Z said:

The clutch is bigger (240mm / 225mm) on the 2+2, but that really has no effect on the transmission itself. 

 

Should still work with a 240 clutch and zx throw out, Correct?

[zKars]

Just keep ALL the bits from the 240 clutch wise (disk, plate, throwout, bearing sleeve) and it will bolt up and work. Don't use any of the stuff from the car with the trans you're using.

[Terrapin Z]

1 hour ago, 7tooZ said:

My understanding is that the percent variance between 79-80 and the 7/80- 6/83 is only 3%. 

I think there are 3 different ones, with the later two being very similar other than the slight difference in the 5th ratio.

280 ZX (8/78-7/79)	FS5W71B  5 spd "B" type	3.321	2.077/37%	1.308/37%	1/24%	0.864/14%	also 810 Maxima
280 ZX (8/79-6/80)	FS5W71B  5 spd "B" type	3.062	1.858/39%	1.308/30%	1/24%	0.773/23%
280 ZX (7/80-6/83)	FS5W71B  5 spd "B" type	3.062	1.858/39%	1.308/30%	1/24%	0.745/26%

 

1 hour ago, 7tooZ said:

Should still work with a 240 clutch and zx throw out, Correct?

I believe you use one clutch or the other. The throwout collar is different as well. 

You will need to address the shifter clearance at the tunnel opening. 

I am putting the same set up together myself. I just found a shifter that should work without having to trim anything out of the tunnel. I haven't tested it yet though. 

[7tooZ]

I believe you use one clutch or the other. The throwout collar is different as well. 
You will need to address the shifter clearance at the tunnel opening. 
I am putting the same set up together myself. I just found a shifter that should work without having to trim anything out of the tunnel. I haven't tested it yet though. 

I would be interested in see what shifter you have found. Looks like I anger theZ out of storage on Tuesday and can get started on the conversion while Keating delivery of the trans.


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[siteunseen]

I have a '79 2+2 transmission in my '72.  The ZX shifter wouldn't work with my console and boots. They are straight and my boots are angled toward the back. Some grinding of the '72 shifter worked for me. 

I put the 240 speedo cog in the ZX transmission, new oil seal around the speedo cable too.

I like it. 75 @2,200rpm.