T-56 ZZ4 combo

Reply Subscribe

Thread Tools

Search this Thread

Jun 1, 2001 | 04:02 PM

Electromaro

Thread Starter

Member

Joined: May 2001

Posts: 150

Likes: 0

From: jacksonville

T-56 ZZ4 combo

ok, obviously the t-56 is a great tranny, and the zz4 is a great engine, but i'm wondering if anybody has had any complications with them together? also what can i do to make a zz4 emissions legal? thanks guys

Jun 1, 2001 | 10:58 PM

Fbird88

Member

Joined: Jan 2001

Posts: 319

Likes: 1

From: Jacksonville, FL, USA

Car: 1988 Firebird

Engine: GM Performance Parts 350 HO

Transmission: T56

Axle/Gears: :(

I read an article about a guy who has that combo. It was in a book called Camaro Bolt-on Performance Guide. Where are you in Jacksonville? There's a store called Automotive Engineering that sells that book. About the emmissions, GM classifies the engine to be used in 1973 or newer cars or for any year offroad vehicle, but I'm sure you can get it to pass a sniffer test easily. My combo is similar, but I've got the 330hp vortec engine with a T56.

Jun 3, 2001 | 02:05 PM

Electromaro

Thread Starter

Member

Joined: May 2001

Posts: 150

Likes: 0

From: jacksonville

i'm actually in jacksonville nc. i thought i specified when i registered, but i guess i forgot to. anyways, everybody says that the t56 is a great swap, how painless is it really for the install. i know the entire clutch system has to be replaced. does the t56 have good gas mileage benifits with 6th gear? thanks man

Jun 3, 2001 | 05:20 PM

Kevin91Z

Moderator

iTrader: (1)

Joined: Jul 1999

Posts: 10,950

Likes: 26

From: Orange, SoCal

Car: 1990 Pontiac Trans Am

Engine: 355 TPI siamesed runners

Transmission: Tremec T56

Axle/Gears: 12-Bolt 3.73

The ZZ4 engine by itself as a carb'd config is only legal as part of a special kit for 82-87 LG4's and L69's with automatic transmissions. Its 50-state legal that way. For a TPI car, all you have to do is add the Corvette L98 EGR tube, and it'll pass smog easily. For a TBI, I have no idea. The heads do not have the EGR passages in them, which is the problem.

The T56 will bolt up to a ZZ4 engine with no problems.

------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

Jun 4, 2001 | 10:08 AM

Mark W. Winning

Senior Member

Joined: Oct 2000

Posts: 524

Likes: 0

From: Stuart, Florida USA

The t-56 is real easy to install. Its an afternoon job if planned right. You need to change the slave cylinder over to a 4th gen one, which is real easy and you need to notch the floorpan about 2 inches at the rear of the shifter hole. I bought an aftermarket crossmember and the whole thing bolted right in. The stock driveshaft fit, but I did later switch to the 6 speed front yoke since it has a longer thread engagement.

------------------
1992 Pontiac Firebird 350/Six Speed
1987 Toyota Pickup 383/500+ HP