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05-04-2004, 12:51 PM | #1 |
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Join Date: Jun 2003
Posts: 139
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Transmission question
I have gone through 2 " bulletproof" th350's in the past year ( built with redline clutches and hardened sprags etc" and am finally going through the 3'rd one this week - I brought it in to the trans shop for a new build and can't figure out what to do... Should I have him build me a 4l60E and be done with it ( 1700.00 ) or should I wait for a 400 case ( 1200.00 ) to come available? I have a 900$ credit for the th350 coming because it has come apart 3 times - 500+- hp at the crank kills it?
wich is stronger? |
05-04-2004, 05:16 PM | #2 |
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Join Date: Apr 2001
Location: Goleta, CA
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I would recommend if you are going to go with a 4L60E then why not go with a 4L80E tranny as that will be able to handle the hp your engine is pushing. Otherwise I would recommend a T56 6 speed Manual!!
Charlie
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1968 C10 Truck LWB Fleetside 1968 C10 Truck SWB Stepside 1994 K2500 Ext Cab Fleetside 2008 Honda Civic Si *lease* |
05-04-2004, 06:19 PM | #3 |
My son, my joy.
Join Date: Sep 2003
Location: Spokane WA
Posts: 463
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500 horses in front of a TH350? I'm no expert, but that does sound a bit excessive.
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05-04-2004, 06:28 PM | #4 |
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Join Date: Apr 2004
Location: Grant, Alabama
Posts: 504
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The 4L60E is just a Turbo 350 with an overdrive basically. Actually its the newer version of the 700R4 but with electronics. You will need a stand alone computer to run the trans also. You will need other things like shortened driveshaft, throttle cable to the carb, etc.. Wait for a Turbo 400.
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72 Chevy C20, SOLD (Dang it.) 09 Challanger RT six speed in all black. 74 Datsun 710 wagon, all 1.8 liters of screaming Datsun power. 73 C10 long bed, 350/350 combo, nice shape. |
05-04-2004, 06:35 PM | #5 |
Careful, they attack...
Join Date: Aug 2001
Location: Waterford, MI, USA
Posts: 1,107
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I would agree with the 4L80-E. If you have that much HP and beat on it like it sounds you do. The 4L80 will handle it. It's like a TH-400 with O/D. You will need to have some other work done. Mostly computer,and D/S. You shouldn't be able to kill it though. It would be worth the money for you I think.
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05-04-2004, 06:48 PM | #6 |
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Join Date: Jun 2003
Posts: 139
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thanks, I actually went to the trans guy today and we settled on the 4l80e with a stand alone for the lock up 4th. - with kevlar clutches hardened sprag and vette servos and some othe cool goodies brought it back up to 1900.00 - it should be a sweet setup! - especially since I am going to tear it out and stick it in the 70 SS nova I found - I hope to pull wheelies!!
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05-04-2004, 07:33 PM | #7 |
Young One
Join Date: Oct 2003
Location: La Porte Indiana
Posts: 138
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I run a turbo 350 that I rebuilt with a b&m kit in my 69 Camaro. Stock body/interior.
On motor 11.30's... juice 10.60's... Has a 5,500 stall. Got the biggest trans cooler I could find and an extra deep pan. Shift at 7,000rpm at the strip. 535hp+/- Anyway, overdrive would be a big plus. Save your money and get a computer operated trans.
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69 R/S Camaro 79 K5 86 M1008 11 P71 Vic 12 Ram 3500 18 Ram 2500 |
05-05-2004, 05:45 AM | #8 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
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Does that price include the stand alone computer?
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05-05-2004, 02:38 PM | #9 |
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Join Date: Jun 2003
Posts: 139
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Yeah, it covers removal of the old trans, and installation of the new trans and he is going to wire it up with the lock up kit from TCI.
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05-05-2004, 06:49 PM | #10 |
Careful, they attack...
Join Date: Aug 2001
Location: Waterford, MI, USA
Posts: 1,107
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Just a thought, if it only needs a lock-up kit, then it might not be a 4L80E. Could be just a 4L80. the 4L80E NEEDS a computer to work, not just something to tell it when to lock in 4th gear. Make sure he isn't selling you a 700-R4 for way more than it's worth.
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05-06-2004, 06:44 AM | #11 |
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Join Date: Jan 2004
Location: NH
Posts: 2,266
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I thought all the 4l80 and 60's were elctronic and needed a computer for them. TCI sells a built and modified 700R4 to handle 700HP and I beleive the price was around $1400. I do hear the 4l80's can handle more power, when I was looking for an OD unit I looked at both the 700R4 and the 4L80 the 4l80 at that time was a couple hundred more and the computer is what killed the deal because at that time it was almost as expensive as the trans was. I don't run my truck at the dragstrip but I do beat on it a bit and my engine is no slouch either and the trans with a lockup in 4th gear has held up well.
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1967 C10 - SWBSS Pro Street 427sbc, 700R4 & 4.10 Gears 1948 Chevy FleetMaster Coupe, LS1, (almost done) 1950 Chevy StyleLine Coupe 250/6 3x2 Dueces 2009 Toyota Tundra 1996 Harley RoadKing "I maybe getting old, but I can still burn rubber with the best of them" |
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