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'90 W/T - Is my g/box input shaft 18 or 20 spline
https://auszookers.com/forum/viewtopic.php?f=5&t=8689
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Author:  Red_October [ Thu Dec 17, 2009 1:14 am ]
Post subject:  '90 W/T - Is my g/box input shaft 18 or 20 spline

I'm soon to be replacing the clutch and need to know if my gearbox has an 18 or 20 spline on the input shaft. It's to suit a '90 W/T Sierra with original g/box.

Cheers,
Jimmy

Author:  losfer [ Thu Dec 17, 2009 1:37 am ]
Post subject:  Re: '90 W/T Sierra - Is my g/box output shaft 18 or 20

FFS , the amount of people that get asked that by spare parts monkeys with incorrect catalogues is amazing , get the monkeys to crossreference the part number SZ330 , this is the kit you are after .

Author:  Red_October [ Thu Dec 17, 2009 1:44 am ]
Post subject:  Re: '90 W/T Sierra - Is my g/box output shaft 18 or 20

Clutch Industries and Exedy both list two different clutches for my '90 W/T Sierra (18 & 20 spline) in their catalogues. Same thing goes for the water pump as well. It would appear that 1990 was a transitional period for the Sierra?

Cheers losfer. I'll pass the info on. If someone knows which one i've got i'm still all ears.

Author:  303zuke [ Thu Dec 17, 2009 2:13 am ]
Post subject:  Re: '90 W/T Sierra - Is my g/box output shaft 18 or 20

So why would you put the Clutch disc on the gearbox OUTPUT shaft?? 8O

Author:  Red_October [ Thu Dec 17, 2009 2:22 am ]
Post subject:  Re: '90 W/T Sierra - Is my g/box input shaft 18 or 20 s

input :oops:

Author:  31zook [ Thu Dec 17, 2009 9:44 am ]
Post subject:  Re: '90 W/T - Is my g/box input shaft 18 or 20 spline

lol i think it's to do with yout motor number, wether its a G13A or a G13B

Author:  Red_October [ Thu Dec 17, 2009 12:03 pm ]
Post subject:  Re: '90 W/T - Is my g/box input shaft 18 or 20 spline

nah each clutch suits a particular spline that matches the input shaft on the gearbox.

I have a G13BA.

There are these two options:

18Spline/19.3OD
20Spline/22.4OD

It's not urgent as I have a part number from losfer to cross reference but i'm curious nonetheless.

Author:  royce [ Thu Dec 17, 2009 12:20 pm ]
Post subject:  Re: '90 W/T - Is my g/box input shaft 18 or 20 spline

you have the box with the inspection bung correct?

then its the same one as the earlier 1.3 narrow tracks

Author:  Hybrid [ Thu Dec 17, 2009 12:49 pm ]
Post subject:  Re: '90 W/T - Is my g/box input shaft 18 or 20 spline

Both my gboxes have the inspection bungs. One is a 89 one is a 91. 89 is 18 spline 91 is 20 spline. Don't bother guessing. Get it out. Its a gamble otherwise. I've still got an unused 18 spline sitting at home from when ripco told me thats what my 91 needed.

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