LS6427

iTrader: (2)

and last a long time.....

How long would it last behind 900/900 for a street car doing roll-on runs only.......never a drag track launch.

Just curious really.

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Jake's Performance

iTrader: (2)

A stock 4L80E can reliably handle about 450/450 long term. The weak part is the 3rd gear clutches. It's an easy almost free fix but requires internal changes.

The next weak component is the input shaft, some will break at 500 HP/TQ or less in HD applications others will live @ 1000 but generally 750ish is a good number to upgrade to a billet input.
900/900 even roll racing will kill the 3rd clutches within a month, maybe a week.

LS1NOVA

iTrader: (12)

Would this be the dual feed mod?

sw07gt

iTrader: (10)

Also wondering this myself, haven't really found a definite answer, looks like I'll find out by pushing mine to the limit. Last year the car made 520/520 on a stock transmission of unknown mileage. Held up to maybe 20-25 track passes and a lot of roll racing.

LS6427

iTrader: (2)

I get 3-4 years out of 4L60E before it needs a $200.00 rebuild. Thats with my approx. 500 RWHP/RWTQ. No need for a 4L80E. But I do wish I would have done the 4L80E conversion 6 years ago, but it was so new to our cars I just passed on doing it.

But my next set-up will make 900 RWHP...at least. Actually, its gonna make more than 1,000....

Looks like to me I'll be needing a $3,000+ built 4L80E........oh well.

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