GTO tranny question

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May 17, 2007 | 07:46 PM

freakosaurus

Thread Starter

Joined: May 2007

Posts: 31

GTO tranny question

Hey all, is the 3L twin turbo tranny for the GTO/3000/Stealth TT 18 spline? if it is, im assuming that the one I found for $1000USD inc. shipping is a wicked deal. can anyone confirm?

May 17, 2007 | 10:13 PM

thestealth

Senior Member

Joined: May 2004

Posts: 1,197

RE: GTO tranny question

Sometime during the 92 model year they went to a 25 spline tranny.

May 18, 2007 | 02:43 AM

freakosaurus

Thread Starter

Joined: May 2007

Posts: 31

RE: GTO tranny question

i have a 90, does that mean its 18?

May 18, 2007 | 07:23 AM

thestealth

Senior Member

Joined: May 2004

Posts: 1,197

RE: GTO tranny question

Unless it has been swapped by a previous owner, yes, you have an 18 spline.

May 18, 2007 | 07:56 AM

freakosaurus

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Joined: May 2007

Posts: 31

RE: GTO tranny question

any idea why they went from 18 to 25 spline?

May 18, 2007 | 08:19 AM

thestealth

Senior Member

Joined: May 2004

Posts: 1,197

RE: GTO tranny question

Because the 18 spline was weak and prone to breaking when launching hard.

May 18, 2007 | 05:55 PM

freakosaurus

Thread Starter

Joined: May 2007

Posts: 31

RE: GTO tranny question

forgive my lack of tranny klnowledge, but the splines are contained in the bellhousing, so a 25 spline transmission should just drop in no?

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