Not really. The hybrid is proven on ONE car. The HD 4T60 diff parts have been around forever.

Edit:
I need to make something clear here. There'* nothing magical about my trans. Nothing magical about DrJay'* either. What we did with ours was nothing new at all. Remember the overpriced ASG from DP? Yup. Same hard parts inside, same shift kit. Didn't have the heavy-duty diff, but it had an LSD option. This is not rocket science, nor is it groundbreaking. It'* just that very few people have done it, that'* all. The 4T60 is not lacking whatsoever in a viable performance aftermarket. I can't understand why so many people still think it is.

On the sublect of pet peeves, since you were the one to bring that up. I hate people that act GODLY on here. Whether you mean to do it or not that is the way you come off to me and a few others.
Bill, Don't tell me what I can and cannot break, don't tell me I'm spending too much money, don't tell me things are better without SOLID proof. Everything up untill now has not been BACKED up.
If these parts are off the shelf and so widely used, where is the proof of them lasting? Who else has them? How fast do they go? Did they get bent trans lines too with thier trans?
Did you know that the entire 4t65-HD diff is actually LARGER than the 4t60?
There is almost no difference in the amount of work needed to do the conversion. And it is BACKED up.
The S1 L67 makes more power down low. But I doubt it'* making more than 9-10 sec S2 L67'* with stock 65-hd'*.
It'* not uncommon for 4t60/65-e'* to blow through diff cases with minimal mods. So why not just upgrade to a LARGER STRONGER PROVEN 4T65-HD? Makes sence to me.
I'm getting tired of this pissing contest.

I'm not acting godly at all, bud. While I have the greatest respect for your willingness to do your own work and try new things, I think it'* a big mistake to tout your diff conversion as a viable alternative in this topic for Mortehl, when 1: He doesn't need it 2: it'll cost more and 3: It'* not proven.

Everything ZZP does is not magical. There are some people that think it may be the case, but it'* just not true. You don't need that diff any more than I need drag slicks on my electric scooter. Touting it as you do will only make some Noob go out and waste a bunch of money on something he doesn't need.

The misconception that the 4T60 or the Series 1 has no performance aftermarket is the root problem here. Until recently, nobody has even TRIED to tap the aftermarket that'* been there forever.

My advice to you is to quit talking with ZZP about your trans, and go to a local shop with years of experience and ask their opinion. If you think performance parts for the 60 don't exist, that'* only hurting you. My builder had no problem whatsoever in finding everything he needed and I wanted. And neither will any other good trans shop.

Converting a diff like you suggest for a street car with mild mods is ridiculous. Pure and simple. It'* an absolute waste of money. Like I said earlier, if you want to do it, DO it. But it should be said (and this is why I'm arguing with you in the first place) that it'* probably not the most cost-effective method of achieving a stronger Diff for 95% of the cars here. Having Mortehl go out and do this would be like you going out and buying 22" wheels for performance off the line.

The 65HD diff is more proven than whatever you have.
Don't ASSume I think everything ZZP does is magical. Besides, ZZP dosen't even build thier transmissions.....
Who even said I talked to ZZP about a tranny? I didn't.
I AM planning on going to Dynotech though.
Who said I asked for your opinionon my car? I didn't.
Drag slicks on a scooter.. that was cute.
You keep saying I don't need it. How the he!! do you know? Ohh you don't. Thats right. Since you have yet to back that statement up.
I'm going to get it, it'* going to be stronger, and it'* not going to cost me that much.
This is how much bigger the parts of the diff are.

Thats the biggest pic thrasher had.

BUT
For a complete noob with minimal mods I would say stick with stock and stay away from the spring-clutch type LSDs. For those with cams, ported heads etc.: If you can get a deal on the parts needed to do the 65-HD swap, the labor will not be much more and I think it'* worth it.

So you still think Mortehl needs this Diff?

I don't often get pushed too far around here, and it'* not going to start in public here. You have a PM.

I never said he needed it if you look I said he can upgrade. I just wanted to put the other option out there.

Then what are we arguing about?

Would you agree that he probably doesn't need anything more than a HD buildup of a 4T60E HD diff?

I do agree that he dosen't need the 65-HD diff. But since I know nothing about the build up of a 4t60-hd diff. I'd say stick with stock.

Anyone with any comments, complaints, or questions about anything I said in this thread can pm me.

No comments or complaints other than our disagreement on which diff is the better. I think nobody will know until time tells the story on both.

wow, you guys lost me about 20 posts ago...

But don't try and explain it to me