Anyone running a non-lockup converter in a 4L60E?
07-07-2004, 01:15 AM
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Anyone running a non-lockup converter in a 4L60E? I'm curious what the gains are, how much weight is saved by removing the lockup clutch.
I might look into having my PT4400 clutch removed. I only lock up the car now in 4'th gear for highway cruising but I am not liking the abuse of the lock/unlock under WOT/partial throttle conditions.. It's even hard to tune out some of the abuse..
I'd rather run non lockup than risk having the clutch break and take out my trans.
I might look into having my PT4400 clutch removed. I only lock up the car now in 4'th gear for highway cruising but I am not liking the abuse of the lock/unlock under WOT/partial throttle conditions.. It's even hard to tune out some of the abuse..
I'd rather run non lockup than risk having the clutch break and take out my trans.
07-14-2004, 02:24 AM
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If it were me I would ditch the 4L60E before getting rid of the lockup, just being in overdrive and then whenever giving it gas having it stall up a ways part throttle defeats the purpose of the Overdrive, IMO , go to a Th400 or TH350 if you were gonna do that, plus i think you need to do something to the Valvebody or the pump system if you get rid of the lockup converter on a 4L60 but im not 100 percent sure (X 6-Speed Driver)
But to answer your question, pick up a non-lockup (th350-400 converter) and then grab a 700 or 4L60E lockup converter noticable diffrence in weight and then spin that a 6g's thats a pretty good bit if recipercating mass. So you could probably ditch some pretty good weight save your self the grief tuning and some piece of mind knowing that its not gonna give out and trash the tranny, but im sure the clutch bands would let go before (DOWN TO THE 4L60 and its old school brother the 700R4) the lockup clutch.
A good efficient converter works very well and you wont miss the lockup at all
Andy
Trans-braked TH400 owner
But to answer your question, pick up a non-lockup (th350-400 converter) and then grab a 700 or 4L60E lockup converter noticable diffrence in weight and then spin that a 6g's thats a pretty good bit if recipercating mass. So you could probably ditch some pretty good weight save your self the grief tuning and some piece of mind knowing that its not gonna give out and trash the tranny, but im sure the clutch bands would let go before (DOWN TO THE 4L60 and its old school brother the 700R4) the lockup clutch.
A good efficient converter works very well and you wont miss the lockup at all
Andy
Trans-braked TH400 owner
07-14-2004, 10:40 AM
#4
What abuse is the clutch taking? It shouldn't be locking under WOT unless you altered the programming to do that. It is easy to get rid rid of lock-up at speeds & acceleration levels that you choose.
If the weight is the goal, I can see doing it for that.
If the weight is the goal, I can see doing it for that.
07-14-2004, 07:48 PM
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Weight is the goal.
In Speed Density mode, the converter doesn't seem to unlock as fast as in MAF mode. Puncing it at low RPM in 3'rd gear with a converter that stays locked tends to cause some TCC slippage.
I would like to keep the 4L60E for now due to its weight, efficiency and gearing.
In Speed Density mode, the converter doesn't seem to unlock as fast as in MAF mode. Puncing it at low RPM in 3'rd gear with a converter that stays locked tends to cause some TCC slippage.
I would like to keep the 4L60E for now due to its weight, efficiency and gearing.
07-15-2004, 03:15 AM
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I had a non lock up converter in a 4L60E, the reason it was non lock up was because it was an 8" converter that had a 4600rpm stall speed.
It was fine on the highway it would vary in RPM's more than a lockup as when it got to an incline the converter would slip a little.
It was fine on the highway it would vary in RPM's more than a lockup as when it got to an incline the converter would slip a little.
07-15-2004, 03:25 AM
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Ive had both non-lockup and lockup converters. The weight saving doesnt really have any influance on performance. Gas mileage is the same with a lockup (4000rpm) vs non-lockup (3000 rpm). Oviously trans runs cooler for daily driving /w lockup converter.
