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4l80e or turbo 400????????

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Old 09-02-2009, 12:45 AM
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Default 4l80e or turbo 400????????

I have a t-76/ls1 setup in a 92 mustang coupe and im trying to decide on a transmission. It has a computer and harness from a 200 6-speed camaro SS. I would like the overdrive but my question is do i need a computer for aod to operate a 4l80e with a reverse manual valve body and transbrake or will it all be mechanical. Or should i just go with the turbo 400. The car is turbo so it will have some 3:27 gears in it so it may not be that bad with the 400. Any input appreciated.
Old 09-02-2009, 07:11 AM
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I would go with the th400 but then no OD so the 4L80 is nice too, bet then you have the weight.
Rossler Transmissions is who I went to for my trans and they make both a 400 and the
4L80E, they are extremely helpfull if you call them and ask they will go over the pro's and con's of each set up and explain about the computer (which I don't know if you need or not), I think they make a full manual 80E.
Old 09-02-2009, 09:12 AM
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Originally Posted by Blue92coupe
I would like the overdrive but my question is do i need a computer for aod to operate a 4l80e with a reverse manual valve body and transbrake or will it all be mechanical. Or should i just go with the turbo 400. The car is turbo so it will have some 3:27 gears in it so it may not be that bad with the 400. Any input appreciated.
You do not need a computer in a 4L80E if you run a manual valve body. Right now you can make it a forward manual valve body thru the Transgo. I have a friend that is a transmission guy, and he has his own forward manual valve body with a transbrake. Rossler supposedly has a manual one with a brake, but I think it is just the electronic one with a manual control box (I'm not 100% sure). TCI just came out with a RVMB with brake, but I haven't heard of anyone actually getting it in their hands yet.

BTW I like my overdrive with lockup, 3.00 gears and 2050 rpm at 70 mph (stock f body 25.5" tall tires).
Old 09-02-2009, 09:48 AM
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I run a 4L80 with the TransGo forward MVB, Works grate with not computer assist, I like the overdrive ,because it lets me run a lower gear on the street. 4:30's. 55 mph is 2600 rpms. And i had Cercle-D build me a Multidisk 4400 stall, so i can lockup on top end with the button.
Old 09-02-2009, 04:46 PM
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i have 4l85e.i love it for street use but sucks tons of power.if all you do is race tektrans has good idea.
Old 09-02-2009, 05:37 PM
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thanks for the responses guys. Will any 4l80e work or only certain years? I found one on craigslist that supposedly works perfect out of a 97 truck for $600. Does that sound like a decent deal?
Old 09-02-2009, 06:58 PM
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It basically comes down to two things....price and overdrive. The 400 is cheaper but no overdrive. I just changed from a rossler 400 to a 4l80e just for overdrive. I didn't think you could get a brake to work with a manual valve body unless someone has gotten it to work. The brake would only engage when the tranny was in D....making it pretty much worthless.
Old 09-28-2009, 06:23 AM
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Originally Posted by Randy WS6
I run a 4L80 with the TransGo forward MVB, Works grate with not computer assist, I like the overdrive ,because it lets me run a lower gear on the street. 4:30's. 55 mph is 2600 rpms. And i had Cercle-D build me a Multidisk 4400 stall, so i can lockup on top end with the button.
Could I have the lockup function wired with a micro switch for WOT engagement? Is this wise?
Old 09-28-2009, 07:21 AM
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I was told don't shift in lockup, it can bust the case and destroy the internals. The shift is to violent, On a standard shift M6, the clutch disk has springs to cushion , to help prevent breaking the input shaft.
Old 09-28-2009, 10:56 AM
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Then what is recommended for a manual valve body car?
Old 09-28-2009, 03:46 PM
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I have the Circle-D Multi Disk lockup converter with my 4l80, I have a button on the shifter, so when i hit drive ,i engage the lockup. I dont engage it between shifts, but right after.
Old 09-28-2009, 04:16 PM
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Originally Posted by Randy WS6
I have the Circle-D Multi Disk lockup converter with my 4l80, I have a button on the shifter, so when i hit drive ,i engage the lockup. I dont engage it between shifts, but right after.
So if I'm on the highway in 4th, I could lock it up

What about racing?
Old 09-28-2009, 06:02 PM
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The TCI reverse manual transbrake valve body only requires two power wires to be hooked up. One is for the transbrake and the other is for TCC engagement.
The TCC hydraulic circuit allows the the converter clutch to engage after the 3-4 shift. All you need to do is supply a 12 volt source to the TCC wire. The converter clutch engagement occurs 1-2 seconds after the shift to overdrive.
This valve body was tested for over 1K miles in our G body test car with a 502/502 crate engine.
Old 09-28-2009, 06:14 PM
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Shifting with the converter locked is a little rough with the Transgo -3 in my car, but I have already locked the converter a couple of times with the engine at full throttle, it isn't really that harsh. (modified stock converter).

I believe that the multi disc converters are intended to be locked once you are in high gear.

My -3 kit has worked very well for several thousand miles on the street, plus dragstrip, plus bonneville, my only complaint is a slow 2-3 shift, but I am going to test a spacer in the 3rd accumulator to try fix the slow 2-3 problem.
Old 09-28-2009, 06:16 PM
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Default Video please.

Originally Posted by darkhorsebob
The TCI reverse manual transbrake valve body only requires two power wires to be hooked up. One is for the transbrake and the other is for TCC engagement.
The TCC hydraulic circuit allows the the converter clutch to engage after the 3-4 shift. All you need to do is supply a 12 volt source to the TCC wire. The converter clutch engagement occurs 1-2 seconds after the shift to overdrive.
This valve body was tested for over 1K miles in our G body test car with a 502/502 crate engine.
This would solve my transgo 2-3 shift problem.

Video please.
Old 09-28-2009, 06:35 PM
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Originally Posted by darkhorsebob
The TCI reverse manual transbrake valve body only requires two power wires to be hooked up. One is for the transbrake and the other is for TCC engagement.
The TCC hydraulic circuit allows the the converter clutch to engage after the 3-4 shift. All you need to do is supply a 12 volt source to the TCC wire. The converter clutch engagement occurs 1-2 seconds after the shift to overdrive.
This valve body was tested for over 1K miles in our G body test car with a 502/502 crate engine.
This sounds appealing



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