Performance 4t60e by Engineered Performance

[asylummotorsports]

Well although I have heard both good and bad about EP, my experience was perfect.
Ordered and received my LSD and 3.73 gear set, along with a modified main shaft in TWO DAYS to Canada, (Although that was last May.)

I have heard lately a bunch of different stories about what Jeff may be up to.

He's a great guy but may be a little hard to get ahold of lately it seems.

[3400-95-Modified]

Modified main shaft??? What did you have done? I wonder if it was what I'm thinking of doing later.

[asylummotorsports]

Modified main shaft??? What did you have done? I wonder if it was what I'm thinking of doing later.

How the hell do I know? I know it was an extra $100 or so.

All I know is he worked with buddy Bill (Mr. Transmission, Milton, Ont.) who was building it, and they came up with something.

It sure does work well.

[3400-95-Modified]

You had it modified to be a 4t65e style diff, where the main shaft going to drivers side axle gets turned to have a axle clip on it vs the C-clip that needs to be put on after wards, this allows him to use the CNC machined LSD which Torque455 posted in his j-body 65e thread... as you can see from my pictures I have the stamped steel plates and one side, (the one that broke) is opened up to allow access to the axle shaft. If I could afford the upgrade I would be doing this too, but right now I cant budget an extra $500, $200 for a rebuild is all I can do.

[torq455]

yeah, machined steel and heat treated. that baby is stiff! the differential i mean.

[3400-95-Modified]

My plates are heat treated, but I just beat the shit outa this version so yeah, it brokadid

Hell daily driving alone is a lot of stress on something like that.

[pontiacjeff]

Let me say a couple things... first, the new phone number is 404-394-5776. Second, you can NOT build your own hybrid unit. Not unless you have a mill, lathe, dial indicators, and the know-how to use them. And you also need over 20 years experience working with transmissions and differentials to know what to do in the first place.

It always kills me how people just assume things are so easy! "He uses parts from a -65 in a -60!" Like you just disassemble one and stuff the guts into it from another. I spent a month of Saturdays trying to make this work in a 440T4 for an 88 Reatta L67 swap. I did not originally do this in a 4T60E which, admittedly, is only SLIGHTLY easier than the original intent. Mating parts that are 10 years and at least three designs NEWER than the stock parts in a 440 took alot of know-how, and for young up-starts to think they could grab parts out of a junkyard transmission and just stuff them in is quite insulting. Nowhere in the world will you find anyone "dumb" enough to try to do this. They would just tell you to put in a -65... but how do you run it with the stock computer? You don't. And quite frankly, the -65 electronics leave alot to be desired. My hybrid takes the BEST of both worlds and makes one damn good transmission GM never had the nuts to build. Honestly, the 440 is the best of the hybrids and I will be building one for my wifes Montana when I finish the L67 swap (I already put an L36 in it with the stock 4T65 and the EPC solenoid is on the blink after 6 months.)

Lastly, for what I charge for custom one-off designs, you all should be more grateful. I can't thank Corey and others enough for being patient and waiting it out. Some of you wait a long time, others don;t have to wait. As I said, I weigh out the needs of the customer. I sell diffs thru an online vendor and when he says "Jump!" I say "How high?". For those of you with long-term projects sitting on jackstands in the backyard, body in three shades of gray, I will take that into consideration. Corey waited longer than anyone ever has, but I have cars in my shop that have been there longer. I'm not proud of it, it's just a fact of life... no one else does this stuff and I am only one person trying to make a living doing dumb stuff no one else will do!

I challenge anyone to find someone who is DIS-satisfied with may parts or how they perform. Only ONE guy has ever torn up a diff, it was obviously beat to hell, the gold-colored bronze clutches were BLUE. Insufficient break-in or possibly just over-doing it on the left-turn/right-turn burnouts... well, I fixed it for him for the cost of parts only. There are countless stories of me bending over backwards for people. So many, in fact, that I went completely broke trying to do this stuff.

I did a little comparative shopping and found out that my prices are NOT high and my wait is generally not much monger than anyone else. The exceptions are the big jobs like Corey's transmission and the engine swaps, custom builds I do here in Atl. The reason you waited so long is b/c I am the only one doing this stuff. I do not have employees who build my stuff, everything you get from me, from the initial phone call or email to reciept of the parts, is done by me (with the exception of Fedex...

Corey, what I do on the inside is way more important than what's on the outside. The transmission was clean and dry otherwise Air Freight would not have accepted it, despite being in a crate. What I DIDN'T do is acid-dip or bead-blast the case to show-quality. I didn;t charge you for that either. All the other transmission rebuilders spray paint them silver or gray, sometimes right over the dirt and grease! I use degreaser and pressure wash the cases behind the shop and what you percieved as "dirty" was simply 12 years of oxidation, being aluminum, that is something uncontrollable.

So, I hope I have not seemed to harsh, nor hurt anyones feelings (touchy-feely). As most of you know, I took a day-job in January. I am one of two transmission/driveline technicians at my local Cadillac dealer. I build 4T80's, 4L65's, 5L40's, and even 6L80 XLR and Escalades. I would not be doing this if I was not qualified... frankly, I am bored to tears working on this stuff, but it pays the bills better than EP ever did. I still have a shop until Aug when the lease runs out. I plan to move alot of stuff. cars into storage and the transmission/LSD stuff into the basement. I will continue to build the EP-LSD and offer custom transmissions. I will actually be providing BETTER shipo times once the shop goes away b/c I won;t have all the car work tying me up.

Thanks one and all for your continued support.

Sincerely,

Jeff Ianitello

[3400-95-Modified]

It always kills me how people just assume things are so easy! "He uses parts from a -65 in a -60!" Like you just disassemble one and stuff the guts into it from another. I spent a month of Saturdays trying to make this work in a 440T4 for an 88 Reatta L67 swap. I did not originally do this in a 4T60E which, admittedly, is only SLIGHTLY easier than the original intent. Mating parts that are 10 years and at least three designs NEWER than the stock parts in a 440 took alot of know-how, and for young up-starts to think they could grab parts out of a junkyard transmission and just stuff them in is quite insulting.

I was not aware of all of the specifics but going by what was listed as the modifications to the trans I looked at it as the information you had once given me over the phone talking about the certain 65e clutch packs and sprags that are a direct swap. Granted yes there is more to it than just that for what you do to these and my intent was not to low ball you and make someone think your just doing something anyone can do.

Prime example is my transmission is still completely 60e parts because even the direct swap stuff you told me about I'm still leery on swapping it in there. I would much rather have something built 60e style, or go 65e and use the stand alone controller OR wire up a 98 ecm in my car vs the 97 to control it.

Blue clutches?? That wasn't the first 4t60e diff you built for me was it??? if it was then I bet that thing went downhill from the combination of a synthetic fluid break in period and the type F I ran which also some how ended up killing my drive gear thrust washer and input bearing assy... there were three parts in that trans that showed signs of either improper oiling or bad oil and then wore, and ever since I switched back to regular fluid, replaced that bearing and thrust washer I haven't had another problem.

The latest problem I had with your diff was the plate physically breaking, and thats completely out of your control...

Once again I apologize if I offended you in any way. I've always backed you up when people question your delivery or reliability.

[tonygtp]

how much " faster " or how hp/tq , will you put out with the 3.73 gears? with a 3.4 dohc 207ci? lemme know thanks guys.

[geoffinbc]

Same thing happened to my Fried and his Z24. It took months to get an LSD from EP. He finally got it and he sent his core back for a refund and it took months again to get the refund. He almost had to threaten EP. The product was not that great either. Just a worked over stock unit which was nicked on the bearing journals and had heat marks on the casting from the bearings being removed. I have never had to use heat to get bearing off a diff or pinion. You just need the right puller and a press.

So yea no praises from me either and I am glad it was not my money being spent.

[blackbombshell95]

....

[timg]

3.73 gears will put down 10% more torque per gear, but overall you won't actually have any more torque and horsepower. For the Z34, it would probably be a good thing just based on how tall the gears are. With that said, I'll probably go with 2.90's (or whatever the GTP ones are) with my next transmission.

Tim

[torq455]

just take 3.73/your FDR. take that answer multiplied by your TQ or HP. that will give you an idea of what to expect. i know someone who had something like a3.91 FDR 5 speed that ran a bit quicker with the 3.61 5 speed. i went from a 3.18 to the 3.73, which is ~16% change. should have effectively given me ~20 HP and ~27 TQ more. that's not more power the engine is making, but more at the wheels. i took the car to the track (1/ and ran a little slower--though, i was in the middle of tuning the engine. still need to change shift points and TCC lock times to see what's quicker.

[tonygtp]

cool, thanks guys.

[blackbombshell95]

Hey Jeff. Yes my transmission took a long time. But what I also knew was that you had alot experience with a 60e. I sent zzp/dynotech an email also EP(you) and I got the best response from you. You know your shit, but you have a huge work load.

If the shit works great, then its worth the wait.

I installed the transmission a few weeks ago. I hope to drop in the engine this sunday. And I hope to get the car running and tuned by the beginning of the race season or earlier.



Corey