New Torque COnverter

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Apr 1, 2010 | 08:10 AM

TheNewStyle

Thread Starter

Junior Member

Joined: Feb 2010

Posts: 63

Likes: 0

From: Syracuse NY

Car: '88 Formula

Engine: 350 TPI

Transmission: 700R4

Axle/Gears: Stock

New Torque COnverter

hey guys will a 30 spline torque converter with lock up, work in my factory 700r4?

Apr 1, 2010 | 08:32 AM

TZFBird

Supreme Member

Joined: Jan 2001

Posts: 1,047

Likes: 2

From: Lincoln, Nebraska

Car: 1988 Firebird, 2000 GTP

Engine: 327

Transmission: 700R4

Axle/Gears: 9" posi, 4.11

Re: New Torque COnverter

I'm pretty sure the 30 will work for you as long as you have the 88 trasmission in your car.

I'd like someone to back me up on that. I just upgraded my converter 2 days ago. I counted but have been so excited since then that I can't remember.

Apr 1, 2010 | 08:42 AM

TheNewStyle

Thread Starter

Junior Member

Joined: Feb 2010

Posts: 63

Likes: 0

From: Syracuse NY

Car: '88 Formula

Engine: 350 TPI

Transmission: 700R4

Axle/Gears: Stock

Re: New Torque COnverter

It is factory in an 88 Formula behind a 350... If anyone else can confirm that would be great. Where can I find a number on the tranny to confirm?

Apr 1, 2010 | 12:15 PM

mikeirocz1

Member

iTrader: (1)

Joined: Mar 2007

Posts: 169

Likes: 0

From: San Leon, TX

Car: 91 RS and 88 IROC-Z

Engine: 305 TBI and 383 Carb

Transmission: 700R4/2200 stall & 700R4/3500 stall

Axle/Gears: 3.42 posi and 4.11 posi

Re: New Torque COnverter

From my past experience, 88 and up 700r4's have the 30 spline and the older ones have 27 spline. I just got a 3500 lockup stall with 30 spline for my 88 IROCZ.

Apr 1, 2010 | 02:21 PM

TZFBird

Supreme Member

Joined: Jan 2001

Posts: 1,047

Likes: 2

From: Lincoln, Nebraska

Car: 1988 Firebird, 2000 GTP

Engine: 327

Transmission: 700R4

Axle/Gears: 9" posi, 4.11

Re: New Torque COnverter

Quote:

Originally Posted by mikeirocz1

From my past experience, 88 and up 700r4's have the 30 spline and the older ones have 27 spline. I just got a 3500 lockup stall with 30 spline for my 88 IROCZ.

Thanks Mike. I knew there was a cutoff in years as far as 30 spline input shaft as well as auxillary piston in the valvebody. I just wasn't sure if it was 86 or 87.