Which transmission is best (Page 3/6)
Jncomutt JUL 14, 11:04 AM

quote
Originally posted by lateFormula:

The F23 is rated for input torque of 170 ft/lb.

The F40 is rated for input torque of 295 ft/lb.




This quote just took me back about 8 years. You're right,f23 is junk.
86GTFastback JUL 14, 02:28 PM

quote
Originally posted by Corpsmen Ed:

Yeah, I don't know if I trust the Isuzu enough to leave it in the car. Especially if I swap in the 3800sc. Since I haven't actually driven the car yet, I can't vouch for its condition. When I bought it, I was told it runs but but needed a new fuel pump. It currently has 90K+. And I really don't want to do this more that once.

I love rowing through the gears on a stick shift, but am starting to consider dropping in one of the Automatics.

Thoughts???



I went with the Muncie 4sp, it was in the car and feels solid with 130k on it though. I've heard they are pretty sturdy, but I've been looking at what I would replace it with, an auto is really tempting, they take the abuse and I saw a company that sells a limited slip for one of them. Saw that while pricing one for a f23. I should be driving it for the first time this week, I'll let you know I'd it blows up the first week with the cammed 3800. I've driven an auto 3800 fiero, it just soaks up the abuse and keeps going, who buys a sports car and swaps in a big motor to be "easy" on it?
ZaraSpOOk JUL 14, 04:57 PM

quote
Originally posted by Justinbart:


I would rather drive my car than replace transmissions anymore. It sucks when one breaks and destroys your $300+ clutch.




I was referring to the fact that the OP seemed to want to go with a Fiero Getrag, in which case, you can't drive a car with a busted transmission, no parts available, and no replacement transmission available. In that case the Izusu is a viable alternative since they are in abundance and cheap and most important of all:

HE ALREADY HAS ONE!
Justinbart JUL 14, 05:05 PM
Limited slip for what? Are you talking about a fwd car?

------------------
Turbo 3800 E85 F23 5spd spec5
11.17@132.6

dobey JUL 14, 06:10 PM

quote
Originally posted by ZaraSpOOk:
I was referring to the fact that the OP seemed to want to go with a Fiero Getrag, in which case, you can't drive a car with a busted transmission, no parts available, and no replacement transmission available. In that case the Izusu is a viable alternative since they are in abundance and cheap and most important of all:

HE ALREADY HAS ONE!



Getrags aren't exactly rare. I don't know where you get the idea that they are. Various versions of the 282 were available in many FWD GM cars from the 80s and through the 90s.
FFIEROFRED JUL 14, 07:01 PM
Going back to your other post, doing it for $1500, the 3800SC, if you buy a whole car for the drive line, will have the trans FOR the SC engine. If you go with the stick shift ( any of them ) you will need a mantrans fly wheel. You need to price that part before you make up your mind.
You are going to have to get after market, very much stronger trans, engine mounts and reinforce the cradle for the front trans mount to hang on to that 3800SC engine. The 3800SC is that much more engine. You will have to have the 3800SC ecu reprogramed to get rid of the pass key stuff. When that is done they can set it up for the tire size and all the other things it needs to have done so it will be happy in your fiero.

You will not need any thing that is on your cradle now.. So just leave the car together. get a spare cradle, make a cradle stand to hold it up off the floor. ( your back will like that) Do the swap on the 2nd cradle. When ever you take a wire off of some thing, tag it ! ! this is important !!.
dobey JUL 14, 09:33 PM

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Originally posted by FFIEROFRED:
You need to price that part before you make up your mind.



Camaro flywheel, plus cost to turn down and fit the 142 ring gear can all be done for $100-150, for a new flywheel. Cheaper for used obviously, and cheaper if you can turn it down yourself. The flywheel is hardly a concerning cost. The clutch disc and pressure plate will be 2-3x the cost of fixing a Camaro flywheel to fit.
BV MotorSports JUL 14, 09:51 PM

quote
Originally posted by Silicoan86:

If you want to become an expert at replacing transmissions, go with Isuzus and buy them in bulk to save the downtime in the future.

If you want to do this once, go with the F23.



I have an Isuzu with approx 60k worth of track, racing, autox etc on it. N20, drag radials, the works. Its been freshened up twice (once during the LSD install and on 2002 for a broken shift fork), it has a prototype LSD in it from Quaife. Its bolted to a 3.4TDC in Garth's 87GT. This is the only trans that has been in this car since it was built back in '92-'93. So, pardon me if I don't drink the "Isuzu is crap" Kool-Aid.

Also, I have an F23 in my '88.

Edit to add... would I use an Isuzu for any high HP builds? No. Any 2.8, 3.1, 3.4 NA, sure. If I was going to get really serious, I would use a built 4T65HD. Thats the plan if I break my F23. And that would really suck because I prefer to shift my own gears.

[This message has been edited by BV MotorSports (edited 07-14-2013).]

Silicoan86 JUL 15, 12:25 AM

quote
Originally posted by BV MotorSports:


I have an Isuzu with approx 60k worth of track, racing, autox etc on it. N20, drag radials, the works. Its been freshened up twice (once during the LSD install and on 2002 for a broken shift fork), it has a prototype LSD in it from Quaife. Its bolted to a 3.4TDC in Garth's 87GT. This is the only trans that has been in this car since it was built back in '92-'93. So, pardon me if I don't drink the "Isuzu is crap" Kool-Aid.

Also, I have an F23 in my '88.

Edit to add... would I use an Isuzu for any high HP builds? No. Any 2.8, 3.1, 3.4 NA, sure. If I was going to get really serious, I would use a built 4T65HD. Thats the plan if I break my F23. And that would really suck because I prefer to shift my own gears.




I also have an Isuzu bolted to a 3.4 TDC in my car that's seen a significant amount of abuse at drag strips over the last ten years, but the power band of the TDC tends to be easier on transmissions than most other swaps. It just doesn't have the low rpm second-gear-stripping torque that the larger displacement engines have.

[This message has been edited by Silicoan86 (edited 07-15-2013).]

BillS JUL 15, 01:11 PM
Guess it depends on how you intend to use it.

My stock Getrag 5 speed is going on 24 years in my car and with around 300 bhp through a Centerforce clutch it is still in great shape. Might be different if I drag raced or was a ham fisted shifter, but so far so good - they seem to be very durable.