I feel like a jerk making another thread about the Isuzu tranny, but I've done more than my share of searching and it's still not clear: What is the REAL weakness of the 95-99 Isuzu 5-spd Transmisson on the 2.4L's when you're making very high horsepower? When pushing very high horsepower, exactly what part(s) fails? Sycros? Differential? What?

Of course, there are many many threads about "How much HP can the Isuzu 5-spd hold?" and the response is usually that nobody really knows, or it's like "Just do the Getrag swap from the 00-02 2.4L's". I do NOT want to do the Getrag swap, and I definitely do NOT want to do the NVG-T550 swap. Out of all the threads I've managed to find, nobody has stated clearly which part of the 95-99 Isuzu 5-spd 2.4L is the definite weak point under high horsepower.

I need to know this because I'm starting on my 99 Z24 turbo project, and with a Turbo, hardcore fuel mods, and forged engine internals, I'm gonna have some fairly crazy power if everything works out. The last thing I need is to have a broken tranny after spending all that money, I'd rather take care of the tranny's problem first, then go ahead and do my turbo build.

Thanks!

biggest weakness is the diff....... thats all we have blown in the I@!#$zu's..... I know you stated you dont want to do a trans swap, but honestly its the cheapest way to get a stronger trans into your car......

There is one answer for the I@!#$zu, the older machined gear diffs...... I think it was pre-94 trans...... there is one in the classified (machined gear diff).




SPD RCR Z - '02 Z24 420whp
SLO GOAT - '04 GTO 305whp
W41 BOI - '78 Buick Opel Isuzu W41 Swap

I busted my i@!#$zu tranny doing a burnout... with a stock engine in my 98.

Worst tranny ever, other than Rupaul.





4cyltuner.com - Information Source For 4 Cylinder Tuners
Buy stuff from CarCustoms Ebay! Won't be disappointed!

I'm assuming a Quaife / Phantom Grip / Team Green LSD wouldn't help at all?

SpeedRacerZ wrote:There is one answer for the I@!#$zu, the older machined gear diffs...... I think it was pre-94 trans......

Anywhere I can get that differential new?

And I'm not into tranny work at all... I mean tranny work totally disgusts me... if I got the "machined gear" differential, I assume it'll cost some crazy amount to have a shop put it in?

Also what's the difference between my diff. and the pre-94 diffs?

OK I just went and say that machined isuzu diff. in the Classfieds... "Team GREEN LSD w/ Machined Isuzu Diff"

Do all Team Greeg LSD's come w/ that machined diff. for the isuzu? or do I need to buy the diff, and the Team Green LSD separate?

No, Brian only sells the insert, that deal is one-of-a-kind. If you don't get it through that ad, you'd have to get them both separate.





4cyltuner.com - Information Source For 4 Cylinder Tuners
Buy stuff from CarCustoms Ebay! Won't be disappointed!

Jesus Christ SpeedRacerZ I forgot that you were the one doing the Team Green LSD's! I feel like such a f**k-tard! LOL I'm so awesome!

Shows you how much time I spend in the Transmission Forum!

Anyway, I'll shoot you an email tonight when I get home and have access to my personal email.

In the meantime, how much (roughly) would it be for a shop to install that differential and the T. Green LSD?

install will not be cheap. the trans would need to be removed from the car, then taken apart to install the diff. then reassembled and the trans put back in the car. if your not in a hurry, i can tell u how much in a week or 2, as my tranny as at the shop right now getting a quaiffe put in, then ill be having the tranny swapped in. but total, i would think would be around a g-note for the whole process if your gonna pay someone to do it. maybe more.



Don't steal, the government doesn't like competition

spin1r6 wrote:install will not be cheap. the trans would need to be removed from the car, then taken apart to install the diff. then reassembled and the trans put back in the car. if your not in a hurry, i can tell u how much in a week or 2, as my tranny as at the shop right now getting a quaiffe put in, then ill be having the tranny swapped in. but total, i would think would be around a g-note for the whole process if your gonna pay someone to do it. maybe more.

If you don't mind, would you be able to PM me or email me or at least post here when you find out your final cost? It would mean a lot and help a lot. Thanks.

If you can pull your trans, and put it back in yourself....... it shouldnt cost much at all. Thats where most of the labor comes in.

To install this diff, they just need to open up the trans pull the old diff out, drop the new diff in, measure the clearences (to make sure it doesnt need shims) Maybe swap ring gears between the 2 diffs (to keep the ring matched with the pinion for wear purpuses).... and close it back up. Maybe have some new axle seals, and input shaft seal put in while its there..... and done.




SPD RCR Z - '02 Z24 420whp
SLO GOAT - '04 GTO 305whp
W41 BOI - '78 Buick Opel Isuzu W41 Swap

when i get it back ill post what it cost me. speedracer makes a good point about cost cutting. if you have the tools and time to remove the tranny yourself, youll save alot of money.



Don't steal, the government doesn't like competition

The Isuzu (designed) but GM-built transmission used in 95-99 J-cars was made cheap. They didn't use the real solid Isuzu parts.

If you swapped in the proper Isuzu-built parts... it would be stronger. Or so I've heard.

(I have the getrag )

Just wondering why you are so against doing the NVG-T550 swap. It's really not that much custom work to get it to work. I never previously did any major work on a car, especially not with transmissions, and I was able to swap out my Isuzu with the NVG with no hitches. Let me tell you, its one hell of a tranny. I wish I would have done it earlier. And the cost really wasn't all that much. For the tranny, new seals, new throwout bearing, SPEC Satge 2 clutch, all new bolts, etc., it only cost me about $700. Doing the work yourself is the secret in low cost. If you have any questions about it, shoot me an e-mail.

But yeah, the weakness in the Isuzu is deffinately the differnetial. That's what went out in my Isuzu and I wasn't even driving it that hard. But whatever you decide to do, make sure you do something with the diff. That is your weak point.



2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R

thank god i got a 282 munice 5sp for my swap


Opening Soon Kustom J's

Luke Heier wrote:Just wondering why you are so against doing the NVG-T550 swap. It's really not that much custom work to get it to work. I never previously did any major work on a car, especially not with transmissions, and I was able to swap out my Isuzu with the NVG with no hitches. Let me tell you, its one hell of a tranny. I wish I would have done it earlier. And the cost really wasn't all that much. For the tranny, new seals, new throwout bearing, SPEC Satge 2 clutch, all new bolts, etc., it only cost me about $700. Doing the work yourself is the secret in low cost. If you have any questions about it, shoot me an e-mail.

But yeah, the weakness in the Isuzu is deffinately the differnetial. That's what went out in my Isuzu and I wasn't even driving it that hard. But whatever you decide to do, make sure you do something with the diff. That is your weak point.

I'm not really AGANST doing the NVG-T550 swap... I'm not even really AGAINST the Getrag swap either... I just don't have adequte facilities, transmission expertise, or any real transmission experience at all, and I certainly can't have my car out of comission for as long as it would take me to do it... between rounding up tools, finding a place to do it, finding a place to keep the car, and rounding up help if I ever needed it, I wouldn't have a car for two or three months. Even after all that time and work I doubt I'd get it to work anyway. I can't just not have a car for that long while I screw with it, and I'm definitely not willing to pay a tranny shop some crazy price to do it for me... not worth it.

Plus, I can just imagine watching me swapping in a transmission that wasn't made to be there in the first place would be like watching a retarded 5-year-old read a Quantum Physics book.

I just underestimated how much it would cost to have a tranny shop to do differential work... so now I'm back to wondering exactly how much am I willing to go out of my way and how much am I willing to spend on rediculous things for a car that really isn't worth a s**t to me in the first place... me and this car are gonna fight if it doesn't quit breaking every 5 minutes for no reason...

Thanks for all your help guys... after all this information, I'm really debating whether or not I'm even gonna keep this car anymore... an 03+ Eco or maybe even some other car would be a lot more suitable for what I have planned... Thanks everyone.

can you swap a getrag onto a 2200 99



JBO'S Mr. 64.....

Mr.64 (Shaune Drake) wrote:can you swap a getrag onto a 2200 99

yes..... its the same swap as if you had a 2.4....... just a getrag with a different bell housing.




SPD RCR Z - '02 Z24 420whp
SLO GOAT - '04 GTO 305whp
W41 BOI - '78 Buick Opel Isuzu W41 Swap

cool... but what would the advantage be?



JBO'S Mr. 64.....

depends....... if your abusive to your car, the Getrag holds up a bit better....... plus I like the shifter, and the feel of shifting better in the Getrag.....




SPD RCR Z - '02 Z24 420whp
SLO GOAT - '04 GTO 305whp
W41 BOI - '78 Buick Opel Isuzu W41 Swap

do the isuzu's have a internal slave? if so is it the same as the nvg's?


saturn 5speed turbo 8psi
93' z24 grand prix turbo 3.1 swap, crane 272 cam, 3100 hybrid top end swap, t04b turbo

yes, same setup as the 93-94 NVG....




SPD RCR Z - '02 Z24 420whp
SLO GOAT - '04 GTO 305whp
W41 BOI - '78 Buick Opel Isuzu W41 Swap

They both have internal slaves, however you cannot use the Isuzu slave with the NVG tranny. They are almost identical except for the way one of the lines runs. It won't fit in the NVG case, so you have to have the NVG slave.



2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R

thanks for the info


saturn 5speed turbo 8psi
93' z24 grand prix turbo 3.1 swap, crane 272 cam, 3100 hybrid top end swap, t04b turbo

Geo Storm diffs will swap into the 95-99 Izusu trans. I have done it. Stronger spiders and all.

zsquee24 wrote:Geo Storm diffs will swap into the 95-99 Izusu trans. I have done it. Stronger spiders and all.

Thats what we were talking about...... but welcome to the party.....



SPD RCR Z - '02 Z24 420whp
SLO GOAT - '04 GTO 305whp
W41 BOI - '78 Buick Opel Isuzu W41 Swap