HOW TO TELL WHAT CONVERTOR TO ORDER.

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Dec 16, 2010 | 02:18 PM

BRUTEL 1

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HOW TO TELL WHAT CONVERTOR TO ORDER.

1985 firebird 305 700r4

Do i order a lock up or non lock up torque convertor. Thanks

Dec 16, 2010 | 02:24 PM

paulo57509

Supreme Member

Joined: Jan 2000

Posts: 3,178

Likes: 48

From: Tracy, CA

Car: '87 IROC

Engine: LB9

Transmission: TH700R4

Re: HOW TO TELL WHAT CONVERTOR TO ORDER.

I would say you need a lock-up converter.

Dec 16, 2010 | 03:12 PM

BRUTEL 1

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Junior Member

Joined: Oct 2009

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Re: HOW TO TELL WHAT CONVERTOR TO ORDER.

Just wondering. I have a 83-84-85 trans ams and all 3 look the same.

Dec 16, 2010 | 05:58 PM

five7kid

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iTrader: (14)

Joined: Mar 2000

Posts: 43,187

Likes: 43

From: Littleton, CO USA

Car: 82 Berlinetta/57 Bel Air

Engine: L92/LQ4 (both w/4" stroke)

Transmission: 4L80E/4L80E

Axle/Gears: 12B-3.73/9"-3.89

If I recall correctly, '83 had a 27-spline front pump, and '84-up had 30-spline (might not have the change-over year correct). '85 should be 30-spline, and lock-up.

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