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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: jhiggin on May 07, 2015, 08:49:10 pm

Title: Np208 32 spline???
Post by: jhiggin on May 07, 2015, 08:49:10 pm

So there's a guy with 2 np208's for sale and I was wondering if anybody would know if either one would be 32 spline or 28 spline. One of them is in an 82 sub with a turbo 400. And the other in an 86 sub with turbo 400. Any help would be appreciated

Title: Re: Np208 32 spline???
Post by: 87fleetside on May 08, 2015, 03:28:22 am

If both trucks have the turbo 400 they should be 32 spline. However my 87 has a turbo 400 and the smaller spline 28 or 27 because rpo codes say it was originally equipped with the 700r4, I'd like to here more on this.

Title: Re: Np208 32 spline???
Post by: roundhouse on May 08, 2015, 09:40:16 am

Should be 32
Have the seller count em
Or send you a pic of the Trans
It's easy to tell a 350 from a 400 but most people will claim its a 32 spline since they are worth more


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Title: Re: Np208 32 spline???
Post by: Irish_Alley on May 09, 2015, 07:27:45 am

like round said a th400 is going to have 32 splines no matter what,
th400 and 4l80e are a 32 spline

700r4, 4l60 and th350 are 27 splines

sm465 from 68-78 is 10 splines (35 for 2wd)
79+ is 32 splines (35 for 2wd).