Shift Kit TH400

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Aug 16, 2014 | 01:36 AM

c3_dk

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Safety Car

Joined: Jan 2008

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From: Aarhus, Denmark

Shift Kit TH400

What parts must be bought if you have a TH400, behind a sbc 400 (500hp/500tq) engine, and you would like to have a fast shift?

Is it TransGo Shift Kit TH400
http://www.summitracing.com/dom/part...-1-2/overview/

or

http://www.summitracing.com/dom/part...00-3/overview/

Or something else?

Aug 16, 2014 | 05:08 AM

TimAT

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From: Gladstone MO

C3 of Year Finalist (appearance mods) 2019

http://api.viglink.com/api/click?for...%2Foverview%2F

Use this one, the other one is a full manual shift. No automatic shifting at all

Aug 16, 2014 | 10:27 PM

a71vette

Racer

Joined: Oct 2010

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From: Suffield CT

I was thinking about a shift kit for my 71 BB with a TH400. Question is how big a difference does it make? Is it worth the time to install?

Aug 17, 2014 | 04:18 AM

TimAT

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From: Gladstone MO

C3 of Year Finalist (appearance mods) 2019

IMHO, a shift kit is well worth the money. Better pressure control inside the trans, less slippage, better shifts, and overall longer life. I won't build one without a shift kit.

Aug 17, 2014 | 07:52 AM

riverracer au

Melting Slicks

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From: "ɹǝpunuʍop", Adelaide, South Australia

been thinking about this, but unsure what's the benefit for a mild 350 cruiser?

how do you choose which way to set the kit up, soft, med, hard shift?

what's the difference between a "shift improver kit" or a "transpak kit"?

is it reversible if i dont like the change?

dumb questions i sure, but i've never had an auto before i bought the vette.

Last edited by riverracer au; Aug 17, 2014 at 08:24 AM.

Aug 17, 2014 | 06:50 PM

TimAT

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From: Gladstone MO

C3 of Year Finalist (appearance mods) 2019

My experience with the Trans-Go kits has been that I set them up for police/taxi per the instructions, and the shifts are firm , but not rough under part throttle (regular driving) and then get aggressive when you jump on the go pedal.
Most kits (Trans-Go) are not easily reversible. The instructions specify drilling some of the holes on the spacer plate to larger sizes. Short of replacing the spacer plate, you can't easily go back to stock.

Aug 17, 2014 | 11:48 PM

Ironcross

Race Director

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From: Taylor Michigan

you can by using -Ford type A fluid get improved shifts

Aug 18, 2014 | 07:24 AM

riverracer au

Melting Slicks

Joined: Oct 2010

Posts: 2,275

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From: "ɹǝpunuʍop", Adelaide, South Australia

can you please explain in layman's terms, what the differences are between these kits...

SHIFT KIT
features: Corrects/Prevents/Reduces: Soft Late Shifts: 3rd clutch burnup; rough 1-2; Excess passing gear; late shifts
http://www.transgo.com/products.php?...dcountview=Yes

REPROGRAMMING KIT
features: Automatic shift; Street or full-race; Holds 1st and 2nd to any rpm; Back shifts to 2nd and 1st at any rpm;
Tow & Go and Competition combination
http://www.transgo.com/products.php?...dcountview=Yes

and which would be best for a mild 350, weekend cruiser and spirited driving thru hilly roads, not into drags.