Ugraded Transmission
02-29-2004, 08:28 AM
#11
TECH Junkie
If you've really got 600rwhp a built 4L60E WON'T holdup to it,you'll need at least a 4L80E built with high performance clutches and a shift kit.Summitracing carries Hughes and TCI transmissions at a discounted price or FLP can build a 4L80E capable of handling 1200hp if you have the money.You'll need to modify your crossmember,you'll need a different converter,you'll also need a conversion harness and PCM programing from Speartech,a different flywheel,a position indicator switch with bracket,a TH400 driveshaft yoke and a different transmission mount.You're probably talking $5000 or more if you have the work done at a shop.
02-29-2004, 02:30 PM
#12
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well my setup as is will most likely be in the 400-415 rwhp range, but as i drive that i was gonna build up a tranny and replace it, and after replacing it, up the power on the truck to 500-520 rwhp and just want to make sure i have something that can handle it
02-29-2004, 09:49 PM
#13
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i was talking to a board member and he mentioned these different upgrade packages from http://www.kdsperformance.com/4l60e4.html what of these kits would handle those kinds of numbers?
02-29-2004, 10:02 PM
#14
TECH Junkie
The one called TorquEnstein will hold up to what you have now,but won't hold up to a max effort supercharged truck for very long.That is assuming everything is properly installed.
02-29-2004, 10:48 PM
#16
TECH Junkie
I've broken every broken almost every high performance part listed on that site with a 449rwhp Tahoe.I've broken a hardened input shaft,both front and rear 5 pinion planetaries,a 29 element sprag and a reinforced drum,6 "built"4L60Es in all,now I have a 4L80E.All 6 of the transmissions I broke had at least what the site called the TorquEnstein parts installed.
02-29-2004, 10:57 PM
#17
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well with the tahoe u have more hp and more weight than i do, but how long did it take you to bust all these parts and are u like a pedal to the metal 24/7 driver or would just every time u mash the gas it broke or what?? thats nuts!
02-29-2004, 11:24 PM
#18
TECH Junkie
The 1st and 2nd transmission fried the clutch packs because of defective TCI torque converters. The 3rd transmission smashed a rear planetary at the track after a hard launch,when it made the 1st to 2nd gear shift,that one got me home.The 4th transmission smashed a front planetary street racing when I hit 3rd so I just lifted I limped home in 2nd gear.The 5th transmission broke at the track when a spider gear broke in my Auburn Pro and took out the rear planetary and a 29 element sprag.The 6th just quit running down the interstate highway 400 miles from home when the 13 vane pump failed.When I got the truck home I was on the phone buying a 4L80E.