Im swapping a 3.4L Engine and figured I could swap transmissions at the same time. I found some information on the Getrag but am still curious about a few things.
The reason I want a new transmission is because my Muncie 4 speed (86 GT) just seems clunky and old. I can pull it out of 3rd at any point with little effort so im sure the syncro's are worn. The gears in general are sometimes just hard to get into and I feel like an F23 would be a smoother shifter, plus the extra gear would be nice.
Has anyone matted a F23 to the 3.4L (F body camaro/firebird engine). If so, how is the gearing? What about gas mileage? Also, what is all involved in swapping the F23? Any help is appreciated.
------------------ Every fiero has a story, It's our job to keep that story alive.
Just did a F23 swap in my 88 Formula autocross car. From my info the 2.8 block is the same as yours except for the starter location maybe? There are numerous threads on how and what to do so try the search. I spent a lot of time here reading everything and it was a great experience with great results. The F23 is more plentiful, cheaper, easier to disassemble and repair too. There is also a choice of LSD for it too. The hydraulic throw out bearing is also a better way than the slave cylinder setup. Rodger Thyne makes an adapter for the hydraulics that makes that chore easy. There are also diagrams for the shifter cable brackets as well as ready made kits. I think the ratios are better too. If you have any fabrication skills and tools you can do this. "Just read and understand grasshopper" "And the force will be with you"
Just did a F23 swap in my 88 Formula autocross car. From my info the 2.8 block is the same as yours except for the starter location maybe? There are numerous threads on how and what to do so try the search. I spent a lot of time here reading everything and it was a great experience with great results. The F23 is more plentiful, cheaper, easier to disassemble and repair too. There is also a choice of LSD for it too. The hydraulic throw out bearing is also a better way than the slave cylinder setup. Rodger Thyne makes an adapter for the hydraulics that makes that chore easy. There are also diagrams for the shifter cable brackets as well as ready made kits. I think the ratios are better too. If you have any fabrication skills and tools you can do this.
The syncros line up the gears when going into gear. Bad syncros would cause grinding when shifting or hard shifting into gear. They do not however hold the transmission in gear.
The F23 has a 24,000 VSS that you will have to deal with. It does not directly connect to the Fiero speedo/ECM. One solution is to run the 1227730 ECM that can handle a 24000 input. You do need to rewire if you are doing the swap. The ECM also needs to be programmed correctly for the 24000 ppm.
You will need to add the wiring from the transmission to C500 for the reverse switch if your harness doesn't already have it. Some 3 speed harnesses have the extra plug by the tranny already, some do not.
The diagrams on making the shift bracket are wrong and suck.
[This message has been edited by phonedawgz (edited 05-10-2015).]
I purchased the tranny for $99.00 with 100K on it. I made my own mounts, brackets, HTOB spacer. My project was easier because the car is totally striped down to the bare essentials for racing. HTOB was $90, misc. parts and pieces $100 I found transmissions for $250-$400 and lucked out with this find. I did install an OBX LSD $400.
The syncros line up the gears when going into gear. Bad syncros would cause grinding when shifting or hard shifting into gear. They do not however hold the transmission in gear.
The F23 has a 24,000 VSS that you will have to deal with. It does not directly connect to the Fiero speedo/ECM. One solution is to run the 1227730 ECM that can handle a 24000 input. You do need to rewire if you are doing the swap. The ECM also needs to be programmed correctly for the 24000 ppm.
You will need to add the wiring from the transmission to C500 for the reverse switch if your harness doesn't already have it. Some 3 speed harnesses have the extra plug by the tranny already, some do not.
The diagrams on making the shift bracket are wrong and suck.
Yea my clutch slips a little bit and it will grind at times. The shifting is very stiff. I have heard people say the 4 speed muncie (including motorweek) say that it is a fluent shifter, still clunky but smooth.
Thank you for your information! Is their anyone that makes the shifting brackets or maybe a good thread? I have read that the 7730ECM actually brings more life even into a stock 2.8, so I can only imagine what it does to a 3.4L.
I can already tell my build is going to cost a lot of extra $$$$ but it seems worth it.
[This message has been edited by zzzhuh (edited 05-10-2015).]
My case is a bit unusual in that as I mentioned the car is striped down. The priority for me was to use a more up to date transmission than the 282. The F23 was the unit of choice. My goal was to have a serviceable, easy to install and have a true gear type LSD. The engine bay is also striped down and has plenty of room now for routing cables. The wiring that you will require is not needed in my case as there is no speedometer. I can take some pics in a few days as the car is in the hauler and my work schedule is busy. All I can say is that the info here on the forum is great and if you spend some time reading everything will become clear. Also Rodger Thyne was a tremendous help with his adapter and his expertise.
Only really useful if you're swapping an Ecotec in though (which this thread is about).
I was really confused what you were correcting since Ecotecs weren't mentioned at all, until I made it to the last line of the previous post. A quote would have been helpful.
Im swapping a 3.4L Engine and figured I could swap transmissions at the same time.
Swapping in or swapping out? I currently have a 3.4L & the Isuzu 5 speed. I've just recently been reading about the F23 & I'm interested in continuing to learn more & maybe make it a winter project.
That website has no prices and an extremely vague description. Im confused on what he does, is he good for just questions? Or is he able to provide shifting brackets?
Swapping in or swapping out? I currently have a 3.4L & the Isuzu 5 speed. I've just recently been reading about the F23 & I'm interested in continuing to learn more & maybe make it a winter project.
Yes, I will be swapping in a 3.4L. I'll be going through the engine and hopefully making a lot more than 160WHP.
That website has no prices and an extremely vague description. Im confused on what he does, is he good for just questions? Or is he able to provide shifting brackets?
You really just need to call him. He is a super nice guy. He is old school. You'll probably have to mail him a check if you buy something.
You really just need to call him. He is a super nice guy. He is old school. You'll probably have to mail him a check if you buy something.
Idk, I am almost feeling like I should steer away from the trans swap in general and maybe just rebuild my muncie.... It just seems like there are to many 'iffy' parts to swapping it. Anyone have a site they can direct me towards to rebuild my 4 speed?
