FastSE2DR Posted September 8, 2003 Report Share Posted September 8, 2003 Does anyone know what would be cheaper to do...harden the 4T60E's components to take more power or change it to another heavier duty transmission or swap in a 5spd? I have a 94 3100 so i dont know how easy this is to do. Can anyone give me an estimate on what you think a shop would do these for? Also, what parts would specifically need to be hardened? I know you guys think im crazy but i am goin for a 300fwhp or 300wft/lb tq 3100. Who knows if i will make it but this is going to be my first step. Quote Link to comment Share on other sites More sharing options...
dkorinko Posted September 8, 2003 Report Share Posted September 8, 2003 Someone posted their receipt on here when they had a tranny rebuild on their TGP, it was about 1600. And then someone else said it would about another 1500 or so to get all hardened parts, I dont know if this helps at all but good luck. Quote Link to comment Share on other sites More sharing options...
FastSE2DR Posted September 8, 2003 Author Report Share Posted September 8, 2003 surely someone else in their infinite w-body wisdom has somethin more to add... Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted September 8, 2003 Report Share Posted September 8, 2003 Basically, you are going to pay out the ass for a performance rebuilt auto tranny to handle the power. You can find a 282 pretty cheap at a junkyards and what not. You would have to use the ECM from the W-body that the manual came out of. And, if you did use that ECM you would go to a MPFI, and no longer have SFI. Also, you would have to drill holes for the clutch pedal, master cylinder (you should be able to use the auto shifter linkage hole though), and drill ah hole for the manaul shifter linkage, not to mention, the axles, half shafts, etc. Its a question of if you want to do a lot of custom work or pay some one a lot for a beefed up auto, and if you prefer manual or automatic. Robby Quote Link to comment Share on other sites More sharing options...
FastSE2DR Posted September 8, 2003 Author Report Share Posted September 8, 2003 alright...well i definately prefer manual over auto but im not going to be able to do the custom work for the manual...decisions decisions decisions how bout a getrag 284? im guessing goin to MPFI would lose some performance...how bout a custom chip to handle the stick that way i can get rid of my rev limiter and everything at once and still have SFI. This is gonna be a fun project im getting really excited whatever way it goes...any more word on the new 5 and 6 spd manuals? Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted September 8, 2003 Report Share Posted September 8, 2003 282 or 284, doesnt matter, same amout of work needed, but a stock 282 will hold 300HP ask the Fiero guys. As for a custom chip to keep the SFI........good luck. If you use a 5spd, you will need the wiring harness and ECM from the car it came out of. Unless you know how to flash a flash PCM and re-program it for a manual (which I doubt many could do) you would have to go to MPFI Robby Quote Link to comment Share on other sites More sharing options...
FastSE2DR Posted September 8, 2003 Author Report Share Posted September 8, 2003 well i dont know there is someone around here that makes custom chips because i know a fellow gp owner that has one so i will have to talk to him and see if he can do it, if i get a custom chip do i still need the harness?...isnt the 284 more beefed up? thanks for you help in getting me started! Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted September 8, 2003 Report Share Posted September 8, 2003 the 284 is more beefed, but they are very $$$ to have rebuilt, and there are few to no aftermarket parts avaiable to make them stronger, whereas there are for the 282. Who on here has is using a 94+ PCM and gettin a 5spd to work? I dont think anyone is. If you want 5 spd, the easiest way to use a pre 94 ECM. The SFI is no the only reason why the 3100 makes more power than the 3.1L. Head design is the paramont reason why the 3100 makes more power. I dont think you would lose that much by going to MPFI since you are doing turbo you will have plenty of power. Im just tryin to tell what is the easiest/most available option if you want a 5spd Robby Quote Link to comment Share on other sites More sharing options...
FastSE2DR Posted September 9, 2003 Author Report Share Posted September 9, 2003 alright i appreciate your help very much...now its time to go hunt me some getrags lol Quote Link to comment Share on other sites More sharing options...
Guest TurboSedan Posted September 9, 2003 Report Share Posted September 9, 2003 the 284 is more beefed, but they are very $$$ to have rebuilt, and there are few to no aftermarket parts avaiable to make them stronger, whereas there are for the 282. Who on here has is using a 94+ PCM and gettin a 5spd to work? I dont think anyone is. If you want 5 spd, the easiest way to use a pre 94 ECM. The SFI is only reason why the 3100 makes more power than the 3.1L. Head design is the paramont reason why the 3100 makes more power. I dont think you would lose that much by going to MPFI since you are doing turbo you will have plenty of power. Im just tryin to tell what is the easiest/most available option if you want a 5spd Robby i agree with Robby all the way, but really there is hardly any custom work needed...it's 90% bolt in. i've done the swap twice now, and am in the middle of my 3rd time right now. the only custom things you'll need to do is modify the hole for the auto shifter cables so you can mount the clutch master cylinder there. do you have floor shift or column shift? the floor shift cables pass thru in a different area. either way, the hole will be there, but you'll still need to modify it (basically open it up a little bigger and turn the round hole into a square one). pics of the hole are on my website. you'll also need to use a hole saw and drill holes in the passenger side floor pan/firewall area to run the shifter cables. that's it for custom work. i would run MPFI electronics on the engine - it won't be SFI anymore but i've heard the only advantage of SFI is emmissions, not any real performance gain. running MPFI electronics on a 3100 isn't anything i've done, but i've heard it's relatively easy. also, if you get a Getrag from an '88 car, you can't use the chip since it is setup for MAF not MAP (speed density). i myself am running a '90 Grand Prix engine wiring harness (from firewall bulkhead to sensors) and am swapping in an '88 Getrag 282. i had a '90 282, but that took a poop so i'm doing the swap over again. wiring up the cruise control to work is a breeze....it's just a switch that you run inline with the brake switch so that the cruise control shuts off when you push the pedal in (or else your engine will redline when you push the clutch in - not good). there is also a starter cutout switch, but i never bothered installing that....just make sure you start the car with the clutch pedal in or in Neutral. easy enough. your BIG problem is that you have a '94 car....so you have no provisions for mounting a clutch pedal that i know of. i couldn't help you there. and i'd stay away from the 284. if anything goes wrong with it you have to send it to Muncie, Indiana and get a replacement, which i'm sure is pretty costly. the 282 can handle the power, just get a good clutch. i feel sort of wierd saying that tho, since i've had *two* Getrag 282's go out on me without abusing them and i didn't have gobs of torque going thru them (stock 2.8 on one in an '88 Corsica, and the '90 i had in my CS w/stock 3.1). oh well....i just got my 'new' Getrag 282 for a measly $160, so i'm happy. i should be driving the CS this week again hopefully. good luck finding a Getrag, if you need any small parts like shifter, master cylinder, wiring harness, fluid reservoir etc. i can get that stuff for you. hth joshua Quote Link to comment Share on other sites More sharing options...
FastSE2DR Posted September 9, 2003 Author Report Share Posted September 9, 2003 will the tranny bolt directly to my newer engine? what years and models did these trannys come on so i know what to specifically tell salvage yards what i am looking for...when i asked them if they had any getrag 282s they looked at me like i was an idiot. I know grand ams still came with 5spds up until around 98 or so...if i could find a 5spd 3100 grand am if they made em would that work or would the mounts be quite a bit different? thanks guys Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted September 10, 2003 Report Share Posted September 10, 2003 yes the 282 will bolt to your 3100, its the same block (basically) as the 3.1L. 282s came on 88-90 W-bodies, with either 2.8 or 3.1L. I think those years are right. 284s came on 91-93 DOHCs Hope that helps Robby Quote Link to comment Share on other sites More sharing options...
Guest TurboSedan Posted September 10, 2003 Report Share Posted September 10, 2003 just make sure you get the Getrag 282 (aka Muncie 5TM40), and NOT the Isuzu 282, which has a Quad-4 bolt pattern and is weaker. i wouldn't get a Getrag 282 from anything but a W-body to avoid unforseen problems you may run into later. on the other hand, there are Getrag 282's behind the H.O. Quad-4 engine (as opposed to the weaker Isuzu version). these would be found in N-body Grand Am's, Achieva SVX's, 442's, and maybe some others. you would need to swap the Quad-4 bellhousing out for the V6 bolt pattern 282's bellhousing, but it's bolt on. the reason i mention these trannies is because of better gearing (not as steep) than the Getrag 282's found in W-bodies. i think brian89gp's website lists the gear ratios on the trannies and FDR. mix & match! joshua Quote Link to comment Share on other sites More sharing options...
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