Rusty - under car... 1995 Z28 - Recommendations?

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Old Feb 3, 2025 | 04:20 PM
  #11  
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Thanks Gorn,
Great post.

The car has immaculate service records up until 8yrs ago.
The last major service was done 3k miles ago.

I will have a look, when the brake fluid was done, driving the car the only think I noticed was it binged a bit when I put my foot down.
Brakes where fine etc.... On a positive the fuel tank is 3/4 full so that may help keep the air out.

Really looking forward to picking it up, I have a trailer organised to collect.... I think picking up the car is better than driving it 300k home.
I will be able to do a better job getting the tank clean etc...

Is this the correct manual for 94? are the 93 and 94 the same car?
Or will there be a manual for a 94?


 
Old Feb 3, 2025 | 04:29 PM
  #12  
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Parts manual.... What else?... this is going to be in the family for a while... it was our wedding car 25yrs ago...
As it is going to be a family car for many years... it will be handed down to our boys 21/19...
SO.... auto / manual swap... manual gearbox - yes please..... I wonder if I can get parts?

One thing, as this car is free - I don't care to much about what I spend on it.... i want to build a great car...!
I have to sell a 1987 - XJS V12 Convertible - so I can use some of these funds on the car.....
I only have room for 1 project car in my garage...
 
Old Feb 3, 2025 | 04:41 PM
  #13  
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Originally Posted by DukeComaro


Is this the correct manual for 94? are the 93 and 94 the same car?
Or will there be a manual for a 94?
I think there may be a few differences between the '93 and '94 but mostly the same car.
I had a '93 years ago, the Optispark dizzy was not vented like later LT1s, not sure when the vent came.
1993 being the first year was a bit of an odd duck, t-tops weren't available that year hardtops only and I could be wrong but I seem to recall some of the computer electrics were different.
I would try to find the correct year manual for your car.

 
Old Feb 3, 2025 | 06:47 PM
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no not the same, 94 has map and maf and a different computer. the 94 like the 93 and 95 are one of a kind.
 
Old Feb 3, 2025 | 06:51 PM
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Old Feb 4, 2025 | 10:52 AM
  #16  
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Originally Posted by Y2K
I think there may be a few differences between the '93 and '94 but mostly the same car.
I had a '93 years ago, the Optispark dizzy was not vented like later LT1s, not sure when the vent came.
1993 being the first year was a bit of an odd duck, t-tops weren't available that year hardtops only and I could be wrong but I seem to recall some of the computer electrics were different.
I would try to find the correct year manual for your car.
No t-tops in '93?
Where do you come up with this stuff?

While the numbers were low, over 4% were t-topcars.
 
Old Feb 4, 2025 | 11:26 AM
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93 has a computer system more like a 3rd gen. You can pull codes without a scanner. I also think it has an ECM instead of a PCM. Engine control module vs Power train control module. This just mean the computer is not directly controlling the transmission shifts. I think the 93 is the only year with steel doors.

The parts manual shown above has an issue. It shows 1991 on the cover but says its 93-02. You can find these PDF online. I am not sure how much the GM parts numbers are going to gain you as most camaro specific parts would be discontinued. The GM part number may help if the parts were used in other GM cars. Example: a turn single switch may fit 10 different car models, GM may sell enough of those for it to be worth not discontinuing it.

For a 1995 the gear box swap is a pain. Depending on how detailed or stock like you want to keep the car. You are talking about cutting and replacing a section of the floor and different computer and engine wiring harness. The manuals have a different steering column, and they have a clutch switch instead of a neutral safety switch. There are work arounds for most of the stuff but then your car is no longer stock. As I stated above the 1993 was the last year they used ECM. PCMs work with the transmission. If there is no transmission to plug into that will cause a check engine light.

Examples of work arounds: Adding a switch to not allow the starter to try to turn unless the clutch is pushed is simple as a standalone outside to the factory harness adaptation. You can reprogram the computer to ignore transmission errors and just wrap up the harness and push it out of the way. You could even dewire your existing harness and remove all the wires going to the transmission. It will all depend on your end game. Just keep in mind once a car is no longer stock many mechanics will not work on it.

Hardware: your car would have come with a T-56 transmission. It is a 6 speed. Buying a used one will cost you, heck just finding a replacement for a broken one can be hard. Normal you can just buy a transmission and send in a core but T56 demand is so high you pretty much need to send yours in and have it repaired/rebuilt.

I believe there are 4 different T-56 that came in the camaro. These transmissions have a 15 deg tilt on the bell housing fit the 4th gen floor. You have the 1993 versions (known as the viper, they have the best gearing but are the weakest version) The LT1 version 1994-1997 (MN6) This is the one you would have gotten stock and is good up to 450 Ft/lb of torque. The last is the LS1 version which is stronger that the LT1 version but would require custom fly wheel/clutch to work with an LT1. If you wanted the stock feel you would want to be sure you had the 3:23 ratio rear. The 15 deg tilt on the bell housing means a 15 deg rotation of the shifter. So any non-camaro manual transmission will have the shifter sitting off in the car If you use a Camaro Bell housing.

There may be other option for you. There is a German ZF 6- speed transmission GM used in the Vetts. These transmissions are rare here in the states but, assuming the car is still in New Zealand they may availed around you. I have never done any research into to this as they are harder to find and more expensive than a T-56 here in the US. But all the parts exist to connect a ZF 6-speed to Lt1. Also there are sites that list part numbers to fit a LS1 T-56 into an LT1. You can do an input shaft swap. Maybe the T-56 are more common where you are. I know they put a lot of GM LS T-56s in Holden cars. (I own a 04 GTO with a LS T-56 which is an Austrailian made Holden car) They will not have the 15 deg rotation in the bell housing which would means some moding to the floor would be required. I would assume that with the ZF trans also.
 

Last edited by Gorn; Feb 4, 2025 at 11:37 AM.
Old Feb 4, 2025 | 02:02 PM
  #18  
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Craby thanks for the manual info - I will order this shortly.

I have just finished reading your project - Thread.
Now I know how much I dont know...............

What a journey - very impressive.
My list will look like a walk in the park compared to your thread... basically and old man car!

Your mags and car stance is perfect.... TT2 rims 17 x 9.5 with 46mm offset... would that be be close?

Is it possible to lower the car and still have some ride comfort.
The wife will not like the go-cart hard ride... I will need a middle of the road option.
Lower and nice stance but still some ride comfort.
Is that possible....?

Exhaust system... nice SS system
Lowered with sway bars etc
Paint under the car - suspension components
Leather interior
Stereo upgrade
Minor engine mods
Polish paint and paint stone chips
Tinted windows
Tinted rear lights
and anything else that looks cool....



 
Old Feb 4, 2025 | 05:32 PM
  #19  
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Originally Posted by LastRS
No t-tops in '93?
Where do you come up with this stuff?

While the numbers were low, over 4% were t-topcars.
I guess I was misinformed somewhere along the line.
It was years ago when I had my '93 Z28.
 
Old Feb 5, 2025 | 12:20 PM
  #20  
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Thanks Gorn..... Oh and its a 94...worked that out from the S/N number plate..

I might have to re-think the manual swap, i am on holiday with little to do other then google Gen 4....
Here I was thinking it was an easy job, with bolt on parts.
Getting parts will be a major problem here in NZ

It is easy to start running away with ideas, I did see a KIT, online for $3500 USD that contained ALL the parts.
That is $7,000 NZ plus cost to get it here, which is rather expensive.
Even through the car is free.. they sell here for about 12-15k NZD

Here is the kit... My wife saw the cost @ $3,500 and scoffed... she did not know this was US Dollars LOL... Plus freight to NZ, Plus 15% GST.....


 
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