ZF 310/320 OR Getrag 260? m50b28nv

[yazansoft]

my engine M50NV stroked to 2.8, im using sc14 "Toyota supercharger" 7 psi boost

the gearbox using now getrag from m50b20 "i dont now model number" and the diff 3.64 ratio, i need to run longer final drive ratio,

can i use my old gearbox "Getrag 260" and get longer final drive ratio than m50b20 gearbox?

which gear box can give me longer final drive ratio with 3.64 diff
ZF 310 / 320 ?
Getrag 260?

sorry of my English.

[hookah123]

why spend all that money on swapping out your trans.. 400-700$ when you can go pull a diff from a junkyard or buy one for like $150?

shouldnt your question be, what diff should i run with my getrag 260 to get a longer final drive.. not vise versa..

good lucck

[yazansoft]

thank you hookah123

The Gatreg260 will cost me about 100$, and the ZF310/320 about 140$, and the LSD DIFF 3.15 OR 3.25 OR 2.93 Cost about 300 - 350$

i live in middle east and the price different than USA

i need help now to know the ratio of
Getrag 260
ZF 310 / 320

and what of them i chose, to final long drive?

[hookah123]

Ah, makes sense. I cant help you there, but I am sure if you check out wikipedia you should be able to find some relatively accurate info

[yazansoft]

up

[turbo325ii]

the getrag 260 has .80 overdrive. the zf has 1:1 5th gear, no overdrive.

run the g260 and keep the 3.64 diff if its lsd.

[protomor]

getrag 260
1st 3.83:1
2nd 2.20:1
3rd 1.40:1
4th 1.00:1
5th 0.81:1
R 3.71:1

Getrag 250
1st 4.23:1
2nd 2.52:1
3rd 1.66:1
4th 1.22:1
5th 1.0:1

getrag 240
1st 3.72:1
2nd 2.02:1
3rd 1.32:1
4th 1.00:1
5th 0.81:1
R 4.10:1

ZF 320/310
1st 4.2:1
2nd 2.49:1
3rd 1.67:1
4th 1.24:1
5th 1.0:1
R 3.9:1

From: http://e30performance.info/viewforum.php?f=22

The GR260 would be better with your current diff. But you also might need a different drive shaft and you will need a custom transmission cross brace. It's probably cheaper in the long run to get a taller diff gear ratio.

[exvitermini2]

What kind of HP can the g260 sustain?

I'm prepping to build a 2.8 m50 e30 turbo, and just wondering if I should spend the extra money on the zf box or wait till later..

[turbo325ii]

What kind of HP can the g260 sustain?

I'm prepping to build a 2.8 m50 e30 turbo, and just wondering if I should spend the extra money on the zf box or wait till later..

The g260 can hold lots... many have had sucess with 400-500hp. Possibly more.

[protomor]

I put down 380whp and about the same wtq and I just swapped my ZF for the 260. It should hold

[turbo325ii]

The thing I do love about the ZF is how you can down shift no matter the rpm!!!

[exvitermini2]

Good to hear! Thanks for the input, saves me some coin for this initial build, I'll upgrade it later on down the road or if I have a problem.

Either of you ever built your own trans bracket over purchasing a new one?

Also, it uses the same shift carrier and selector rod as the zf if I recall, yes?

[mohamadr89]

The thing I do love about the ZF is how you can down shift no matter the rpm!!!

yea in my 260 when i try going from 3rd to 2nd and the rpm is kind of high, is scratches bad. i hate it. hey i got a question for you, i bought a wrecked 95 m3. is that a getrag tranny or zf?

[toddman35]

^ zf

[turbo325ii]

yea in my 260 when i try going from 3rd to 2nd and the rpm is kind of high, is scratches bad. i hate it. hey i got a question for you, i bought a wrecked 95 m3. is that a getrag tranny or zf?

It will have a ZF trans from the factory.