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Isuzu Gear ratio's

 
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Stock TE
backyard mechanic


Joined: 12 Mar 2002
Posts: 853

PostPosted: Tue Dec 09, 2003 11:50 pm    Post subject: Isuzu Gear ratio's Reply with quote

All ratios are :1
Gemini
3.790
2.175
1.417
1.000
0.855
R 3.826
F 3.9

Gemini Twincam
3.174
1.963
1.364
1.000
0.855
R 3.402
F 3.909

Piazza Turbo
3.431
1.963
1.364
1.000
0.775
No reverse or final.

117
3.207
1.989
1.356
1.000
0.855
R 3.438
F 3.909 or 4.1

Bellett
3.746
2.320
1.508
1.000
R 4.994
F 3.778 or 4.1

I will add more when I find them.
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Stock TE
backyard mechanic


Joined: 12 Mar 2002
Posts: 853

PostPosted: Tue Dec 09, 2003 11:58 pm    Post subject: Re: Isuzu Gear ratio's Reply with quote

Bellett 1500/1600 GT
3.444
2.133
1.387
1.000
R 4.593
F 3.778

Bellett 1600/1800 GT
3.207
1.989
1.356
1.000
R 3.592
F 3.727

Bellett GTR
3.467
1.989
1.356
1.000
R 3.592
F 3.727
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Racegem
backyard mechanic


Joined: 30 Jan 2002
Posts: 987

PostPosted: Wed Dec 10, 2003 10:20 am    Post subject: Re: Isuzu Gear ratio's Reply with quote

What about the difference in Std Gemini 4 & 5 spd? They're supposed to have a different first gear.
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GasGem
backyard mechanic


Joined: 05 Nov 2001
Posts: 755

PostPosted: Wed Dec 10, 2003 3:20 pm    Post subject: Re: Isuzu Gear ratio's Reply with quote

and diesel??
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Stock TE
backyard mechanic


Joined: 12 Mar 2002
Posts: 853

PostPosted: Wed Dec 10, 2003 3:21 pm    Post subject: Re: Isuzu Gear ratio's Reply with quote

The normal 4 and 5 speed have the same ratios, The TX 4 speed may have a different ratio but I have not been able to find it.
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Stock TE
backyard mechanic


Joined: 12 Mar 2002
Posts: 853

PostPosted: Wed Dec 10, 2003 6:36 pm    Post subject: Re: Isuzu Gear ratio's Reply with quote

I looked for about 45 mins, couldnt find it, I should have by next week though.
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S N 3 A K Y
tinkerer


Joined: 18 Jul 2003
Posts: 153

PostPosted: Wed Dec 10, 2003 7:58 pm    Post subject: Re: Isuzu Gear ratio's Reply with quote

tx/c/d 4sp-
1st 3.507:1
2nd 2.175:1
3rd 1.418:1
4th 1.000:1
rev 3.927:1

te 4sp-
1st 3.467:1
2nd 1.989:1
3rd 1.356:1
4th 1.000:1
rev 3.500:1

tc/d 5sp -
1st 3.507:1
2nd 2.175:1
3rd 1.418:1
4th 1.000:1
5th 0.856:1
rev 3.759:1

te 5 sp -
1st 3.467:1
2nd 1.989:1
3rd 1.356:1
4th 1.000:1
5th 0.855:1
rev 3.438:1

deisel 5 speed
1st 3.48:1
2nd 1.99:1
3rd 1.36:1
4th 1.00:1
5th 0.86:1
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Stock TE
backyard mechanic


Joined: 12 Mar 2002
Posts: 853

PostPosted: Wed Dec 10, 2003 8:17 pm    Post subject: Re: Isuzu Gear ratio's Reply with quote

Thanks I didnt even know the old 5 speed had different ratios
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EVLJT
tinkerer


Joined: 03 Dec 2001
Posts: 181

PostPosted: Thu Dec 11, 2003 8:51 pm    Post subject: Re: Isuzu Gear ratio's Reply with quote

there are several different gearbox's that came with the twin cam, all with different ratios
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Stock TE
backyard mechanic


Joined: 12 Mar 2002
Posts: 853

PostPosted: Thu Dec 11, 2003 9:43 pm    Post subject: Re: Isuzu Gear ratio's Reply with quote

Yeah, and there is 2 cars in my drive way that use a different one for each car. And I got one of the gearboxes for free. For all you smartasses, no it wasnt stolen, the owner gave it to me because he thought it was stuffed, but its not.
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Bugle
tinkerer


Joined: 08 Oct 2001
Posts: 221

PostPosted: Wed Dec 17, 2003 3:40 pm    Post subject: Re: Isuzu Gear ratio's Reply with quote

I have one of these boxes
Some late 70's or early 80's 117 1.8 SOHC gearbox
3.431
1.963
1.364
1.000
0.775
3.402
So it's the same as Piazza turbo except coarse spline output shaft.

Also this sheet i've got has 2 sets of ratios for the 117 1.8 DOHC for some reason.
3.501 3.174
2.165 1.963
1.413 1.364
1.000 1.000
0.855 0.855
3.753 3.402

Piazza G200 DOHC
3.312
2.054
1.400
1.000
0.840
3.550

Another set found in early Piazza turbos
3.174
1.963
1.364
1.000
0.775
3.402
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Zedster
tinkerer


Joined: 19 Oct 2003
Posts: 50

PostPosted: Fri Dec 19, 2003 10:19 pm    Post subject: Re: Isuzu Gear ratio's - What about shuttle/rodeo Reply with quote

Have shuttle box on twincam motor. 1st and 2nd are close but third is a bit of a jump. Good or bad, haven't made my mind up.
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Stock TE
backyard mechanic


Joined: 12 Mar 2002
Posts: 853

PostPosted: Sat Dec 20, 2003 12:40 am    Post subject: Re: Isuzu Gear ratio's - What about shuttle/rodeo Reply with quote

Just try and get the internals out of a Gemini 5-speed, they should fit.
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Zedster
tinkerer


Joined: 19 Oct 2003
Posts: 50

PostPosted: Sat Dec 20, 2003 8:51 am    Post subject: Re: Isuzu Gear ratio's - What about shuttle/rodeo Reply with quote

Yeah, but the question was about ratios? Is this shuttle box stronger/different ratios than normal gemini ones? I'm guessing so. Info?
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Stock TE
backyard mechanic


Joined: 12 Mar 2002
Posts: 853

PostPosted: Sat Dec 20, 2003 12:44 pm    Post subject: Re: Isuzu Gear ratio's - What about shuttle/rodeo Reply with quote

The shuttle gearbox is stronger, and it has commercial ratios (same as rodeo I think). Check with somebody before buying some gemini gears too.
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