What mods are needed? what parts are needed?? Thanks Derrick

 

anyone??

 

I know that someone did one around this board within the last couple years. There was some sorta special bellhousing and everything that SLP had made up for the '92 Firehawks that's out of stock.
Other than that, I believe parts for the ZF-6 are just about impossible to get.
T-56 is a better solution.

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'89 Formula - Thunderchicken - 355 Vette L98/T-56/3.45 9-bolt/black/t-tops - the fun car!
'90 GTA - The GTA - 5.0 LB9/TH700/3.27 9-bolt/black/t-tops/tan leather - the cruiser.

 

the zf is very expensive when something brakes(germany).also there is no provision for a tourqe arm the clutch is a specal dual dsc type that needs an 89 or newer vette flywheel and bell housing which wont fit in an f body's trans tunnel that should be enough to discourage it.go with a t 56 or a richmond 6 speed

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87 trans am 350,L98 aluminum heads,LT4 hot cam,slp runners,slp 1 5/8 headers,3in.y-pipe,edelbrock base,hi flo cat,air foil,afpr,as&m ported plenum,t-5 tranny w/centerforce clutch and a 3.27 9bolt(11.9in. brakes),ed wright's fastchip,relocated iat sensor,tb bypass,accel supercoil,hollowed maf,slp 3in. catback,a/c delete.
oh!no!i think my maf is going!!!!!!!!!!!!

14.10@97mph w/2.01 60'

slp catback is finally on!!!
fastchip prom is in.OH!MAN!
FLOWMASTER S.U.C.K.S

 

I have done the ZF6 swap.

There are quite a few problems with this swap, and a T56 swap would be much easier. If all you desire is to have a six speed, then put a T56 in. You will have no performance gain from the ZF over the T56 since all of the gear ratios are almost identical. While not as "bulletproof" as a ZF, the T56 is strong enough to handle any reasonable amount of power.

With that said, here is the information that I can give you on the swap:

1) Bellhousing. If you can find the SLP bellhousing that was used on the Firehawk, buy it! Even if it is $500, buy it! With it, you can use a regular small block flywheel, and a T5 slave cylinder, master cylinder, clutch disc, and pressure plate. If you can't find one, then you will have to find a bellhousing from an '89 Corvette. It must be an '89. '90 and later used a Magnesium unit where '89 was the only year for the Aluminum bellhousing. You will then need to cut off where the slave cylinder bolts and relocate it lower to clear the floorpan of the car. I hope you can weld aluminum. You will then need the Corvette dual mass flywheel and ZF clutch components.

2) Torque arm. The F-body uses a torque arm to make the firm mounted transmission keep the rear end straight. The Corvette uses a driveline support beam to support the rear of the transmission with the firm mounted rear end. Exact opposites. You will have to get the torque arm off of the transmission. Here is what I used: http://www.jegs.com/cgi-bin/ncommerce3/ProductDisplay?prrfnbr=2589&prmenbr= 76&path=76%202187%202188 It relocates the torque arm to the underside of the transmission tunnel. Get ready to strip the inside of the car, carpet, seats, and all.

3) Driveshaft. The ZF uses a larger yoke then a T56/700R4/T5/TH350/200R4/etc... You will need a yoke from a ZF equipped 'Vette. This will not fit on you steel driveshaft, but it fits perfect on the 1LE aluminum shaft.

4) Transmission mount. Like stated above, the 'Vette doesn't have a transmission mount, nor does it have a provision for one. I fabricated a plate that bolted where the driveline support beam goes and ran under the output shaft. I then bolted a regular rubber mount to it. Due to the relocation of the torque arm, I no longer needed a poly mount. The "adapter" plate will need to drop "step" down to clear the speed sensor.

5) Crossmember. Fabricate one. I used a SPD T56 crossmember, and I modified it to work.

6) Speedometer. All ZF equipped 'Vettes had 3.45 gears. Unless you are running 3.42s, you speedometer will be wrong. LPE offers speedo correction gears for the ZF. They run $150 for the set.

7) Transmission tunnel. You will have to cut out a huge section of the floorboard since the ZF is much larger than the T56/T5/700R4. The top half of the transmission will be in the car. You will then need to refabricate the floor pan over the transmission.

8) Shifter. The ZF's shifter sits to the left of the output shaft instead of centered with it. This will create problems with the console. Do some more fabrication.

There will be plenty of other small things that you will run into along the way.




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'94 Corvette Admiral Blue
-==ICON Motorsports==-
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'91 Z28 Blue/Silver ZZ4/ZF6
335.9 rwhp 374.9 rwtorque

 

Better yet, just buy my car for $10,000 and it will be done for you.