Just as the title says.

What do i need to do/change/buy/modify/replace to make it hold up?

 

At least shift kit, 2-4 band, servos

might want to upgrade clutches too...

There is a lot you can do...check out 4l60e.com

 

It needs a full rebuild with the best band and 3-4 clutches you can get. It needs a HD double-cage sprag, hardended input shaft and drum, hardened reaction shell, better planetary gearsets (5-pinion instead of 4) and a TransGo shift kit set up to shift it only barely more firmly.

Even if you spent every possible cent on it you can getting the very best available replacements for every part, it will still not last long. These are not performance transmissions. This trans has evolved decades old. Not saying old is bad (TH400 case-in-point) but this trans was designed (as a 700R4) originally for fuel economy, not performance. There is not enough friction surface to move high power with a long service life expectancy.

I now that doesn't help, but I swear to you it is the truth.

 

Go to http://www.700r4l60e.com/store/custo...&cat=22&page=1 this should give you what you need.

 

What year did GM go to the 13 vane pump rotor? 1999?

 

Exactly like he stated.....no matter what you do it WIIL break again......
Kyle

 

the truth is second gear is low gear overdriven here's the math for computing the ratio in second because that is the only time the gears are compounded 3.06-1X(.30)=.62+1 or 1.62 because your are still in first gear when the od comes on to make second the od sees 3.06X engine torque. 400lbs torque the od sees 1200 lbs plus in second. l hope this was helpfull jk

 

it takes $$$$....I know that a Rossle 4L60E will handle 500 hp all day long and will not break. In fact it will hold quite a bit more...but be prepared to shell out $3000+ all said and done.

 

IMO, a Hughes is strong as hell. I bought mine from Jim Pace but I am not quite 500hp in my Impala SS. But my Neighbor has one behind his LT1/392 stroker, 55 Chevy and he is over 650hp with a 125 shot and races it twice a month and drives it hard on the street. Just my opinion, though. His has been in for 2 yrs now

 

+1 for rossler

 

For $600 ($3600) more you could buy a Built TH-400 with a US Gear Overdrive.
Kyle

 

yeah you could but that bitch will weigh a ton more than the rossler 4l60e and still not have lock- up rossler 4L60Es have held to 8 secs on 427TT vettes, nines will be no problem. you might have to get it refreshed more often, but you still have OD and lock-up. and for what its worth, rossler's 4l60e are about $2500.

why not just get a 4L80E?

 

I have a home built 4L60e behind my 396LT1. It's got all the parts ordered from Rossler.

 

Im looking into that as an option now.... Hey Bert You comin out this weekend? If so bring be a beer ha ha
Kyle

 

 

speed inc has one, the maximum evil, that can supposively handle like 800 for like 2500.

 

But has anyone tried one and seen how long it lasts????? I love to play on the streets and WOT 2-3 and 3-4 shifts onthe freeway... and the 4l60e cant take it....and im only 502rwtq..... right now......

 

There is a local guy down here, actually in Pompano, who did my tranny (which has never broken with over 600ft/lbs torque for over at least 6 mo's)

He has done a lot of 4l60's for local fbods and vettes. He works at a chevy dealer and he is the 'driveline' specialist.

Anyway, I know of 2 guys (personal friends) that dyno'd over 650RWTQ and 1 ran 10's and the other a best of 11.2 and both ran the **** out of their cars (bottle/week).
I know for sure that both of them ran their cars for over a year like this with no probs, but since then I havent spoken to either.

What was done to the trannies?
Shift Kit
Raybestos Kevlar Band
Servos

Thats it!!

When I had him build my tranny I had him do some extras like the beast sun shell, all clutches, and upgraded pump, and a few other things recommended by 4l60-e.com.

Mine has yet to break but we will see when I take it into the 10's very soon. I will report back on it.

 

IMO, there is a line in the 450 to 475 range that once crossed, the 4L60E isn't gonna cut it - no matter who builds it. Yeh, there might be a few out there that charge a fortune and get a few passes out of one in the 10's or high 9's - but I have yet to hear of anyone who has one lasting a whole season of serious racing! I put 130 to 150 passes on my car a year and I don't want to have to rebuild it every year, let alone more than once a year!

My tranny was built by a local builder who did several for guys in the area F-Body club - all of them have lasted for a long time in the mid to low 11's. But as soon as they go mid 10's or better, they are goners in a short time!

I wanna put mine on the jug, so I'm gonna go TH400 cause I don't drive my car long distances anymore. But if you want overdrive - I would look into a 4L80E.

 

Rick Abare (east coast) has one of my units (4L60E) finishing its 2nd season (full time racing) with times in the 10.20 - 10.40 ET range at 130 - 132+mph in a 1996 Firebird weighing in at 3250 pounds w/o driver. 60 foot times are in the 1.28 - 1.34 ET range, and that is with 9" radial slicks and a 1,800 rpm launch, and shifting at apx. 7,100 rpm.