4L60E limits

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Aug 11, 2011 | 06:32 PM

car15_13

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From: Illinois

4L60E limits

Is it possible to push a 4L60E to 1200whp and beyond??? or any similar trannys like a 4L80e or even 6L80e? if so a little more info on what it would take, and who makes parts and/or kits would be great!

Aug 12, 2011 | 10:44 AM

Gilbert@Ace Racing

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From: D-F/W

No. A 60e cannot handle anything near that power. If someone says it can then I would ask how often they dig it out to replace grenaded shells, stripped sungears, fractured planet carriers and so on. A 60e is a bad idea north of 800 h/p in my experience. and at 800 it is a high maintenance proposition.

In order to make a reliable and worthy recommendation i would like to know what combination this unit is going in. Is it a turbo, roots blown, centrifugal blown or nitrous assisted? I work with big powered cars very, very often and see the limitations of all the transmissions! Even Brunos, Lencodrives, Lencos and so on...

There may be some transmissions you have not considered. Get back to me with some details on what you have in mind and we'll see if we can't figure out what would be a good choice for you.

g

Aug 12, 2011 | 12:24 PM

car15_13

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From: Illinois

I haven't done alot of looking into transmissions yet. I'm just interested in what i can do for an automatic transmission if i take my car over 1000hp. I will most likely run rear mount twin turbos 10-15psi on the street and 20psi at the track, and will run e85 on the street. I'm trying to find a 4 speed or more tranny since this will be a street car.

Aug 12, 2011 | 01:06 PM

Gilbert@Ace Racing

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From: D-F/W

Okay, that's good information. Anyone that has worked with me knows that I'm very big on planning when it comes to building street machines and race cars.

Based on your initial build comments, I would recommend a 4L80E. It would take the punishment you're going to put it through. Not to mention we could build it with a nasty trans brake that would allow you to spool it hard if you wanted to at the track.

The 80E is a formidable unit that can be taken over 1,000 h/p comfortably. It will live well in that combination.

If you'd like to call me to discuss your project I'd be happy to take the time to help you sort it out so that you can begin to put a budget to it.

g

Aug 13, 2011 | 11:20 PM

ss4chad

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From: Keller, TX

Hey Gilbert;

I currently have a 4L60E with a 3200 Vigilante but plan on reflashing the stall to 4200. Here are the specs to the motor I have built that I am looking for a transmission to put behind it:
LS6 Block, Darton 427 sleeves
Comp Cam: 256/264 - 625/625 - 113+4
Dart Heads: 250cc Port Volume, 68cc Chamber Volume 2.08 Intake / 1.60 Exhaust Valves
FAST 90 Intake, Holley 90 T/B
42lb Green Top Injectors
Calles Dragonslayer 4" Stroker Crank
Compstar Rods
Diamond Pistons, Dome

I dont really see me converting to a 4L80E but would like to have my tranny hold 600RWHP. It will remain naturally aspirated and doubtfull I will ever spray the car.
It will be driven at the track on Friday nights, the golf course on Saturday and Church on Sunday. The rest of the time it will sit in the garage with a cover.

I also want a trans brake installed.

What do you have for me? Thanks in advance!

Chad

Last edited by ss4chad; Aug 13, 2011 at 11:21 PM. Reason: Grammar

Aug 14, 2011 | 12:46 AM

LS6427

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From: South Florida

Quote:

Originally Posted by ss4chad

500 RWHP for drag racing with good hooking traction out of the hole....and with a trans brake.....no way a 4L60E will last long at all....maybe not through the night. Maybe not one run with a good hook and 600 RWHP.

car15_13,
I've had roughly 500 RWHP for 9 years with my 427ci., but I never once took it to the track. My tranny lasts roughly 3-4 years, then I have it rebuilt because it starts to feel a little lazy, but just the basics...clutches, steels, new band and seals get replaced. So a rebuild is like $150.00 in parts and my friend rebuilds it for me. He's done three rebuilds in 9 years, the third one was last month. Its just been on street radials, on the street. WAY WAY easier on the tranny and rear-end to be on street with street radial tires. You start using slicks or drag radials at the track.....whole different story. ESPECIALLY with with 1,000+ RWHP. You'll spin the tires before any real hard stress makes it to a tranny on the street.

You have anything more than 400 RWHP...AND plan on hitting the track with slicks or drags.....a 4L60E will not last long.

Get a built 4L80E............

.

Aug 16, 2011 | 08:00 AM

PBA

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I agree with Gilbert@Ace Racing on this. Anything over of 800FWHP is asking for a lot on a 4L60E unit. I have a couple doing alright at 750FWHP and have done fine for awhile. But I try to keep it at that realistic limit. There is no sense on building a transmission every 50 passes or so. If you are not getting over 300+ passes without problems you might need to go to a 4L80E here, unless you like building a transmission all the time.