58x to 24x conversion for drive by cable
09-25-2015, 09:43 PM
#22
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Thank you for the additional ideas.
33willys: You have mixed me up with someone else; I have never owned a 700R4.
Controlling my 4L65E is critical to me, which the Holley Dominator handles.
While I spent many years designing and building electronics, the Megasquirt is a bit too DIY for me; I would likely just end up working on the electronics and software and ignore the rest of the car. I am familiar with the MegaShift trans controller too.
33willys: You have mixed me up with someone else; I have never owned a 700R4.
Controlling my 4L65E is critical to me, which the Holley Dominator handles.
While I spent many years designing and building electronics, the Megasquirt is a bit too DIY for me; I would likely just end up working on the electronics and software and ignore the rest of the car. I am familiar with the MegaShift trans controller too.
Andrew
01-21-2018, 05:21 AM
#25
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Question I was wondering is it possible to run dbc with a 6l80e and a ls3 in a classic car setup. I've heard you can do the box and run with a 4l80e but what's the big difference on using the 6spd?
Last edited by Allante Murphy; 01-21-2018 at 05:32 AM.
01-21-2018, 10:44 AM
#26
TECH Senior Member
As was said in your other thread, a Gen IV computer can't run DBC, as DBW is integral to the computer programming. You mentioned retaining VVT, which is how I know you are using a Gen IV computer.
01-21-2018, 11:50 AM
#27
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Transmission Controllers 6L80 + Hi Murphy, sure you can run your transmission with a "Stand Alone" ($700.00) Transmission Controller.
You will require a TPS Voltage Input (DBC)
Would you like my help ?
Lance
You will require a TPS Voltage Input (DBC)
Would you like my help ?
Lance
01-21-2018, 03:42 PM
#28
Moderator
Murphy, do you already have the 6l80e?
Reason I ask is that IMHO a 6l80e is typically not a good choice for a classic car; this has been discussed many times in the Automatic Transmission section (which I moderate).
Some people buy the entire drivetrain including the LS3 and 6L80E, and then also get the ECM, TCM and electronic throttle pedal. Is this what you have? If yes, then it sounds like you plan major changes to make it DBC. One questions is - why are you trying to avoid the more desirable and modern DBW?
Next all factory ECM (Gen IV+) that support the 58x LS3 are DBW. There are basically three ways to run an LS3 as DBC:
1. Have the engine modified/build as a 24x and use a DBC PCM. (6L80E support impossible)
2. Use the Lingenfelter 58x to 24x conversion box and use a DBC PCM. (6L80E support impossible)
3. Use an aftermarket ECM such as the Holley Dominator which support 24x/58x and DBC and DBW. Again 6L80E support impossible.
While a few Stand Alone Transmission controllers support a 6L80E, that does change the fact that your 58x Gen IV ECM will not support DBC.
In short, trying to run a 6L80E with DBC is impossible with GM components and extremely complex & expensive in any case. DBW is the way to go.
Reason I ask is that IMHO a 6l80e is typically not a good choice for a classic car; this has been discussed many times in the Automatic Transmission section (which I moderate).
Some people buy the entire drivetrain including the LS3 and 6L80E, and then also get the ECM, TCM and electronic throttle pedal. Is this what you have? If yes, then it sounds like you plan major changes to make it DBC. One questions is - why are you trying to avoid the more desirable and modern DBW?
Next all factory ECM (Gen IV+) that support the 58x LS3 are DBW. There are basically three ways to run an LS3 as DBC:
1. Have the engine modified/build as a 24x and use a DBC PCM. (6L80E support impossible)
2. Use the Lingenfelter 58x to 24x conversion box and use a DBC PCM. (6L80E support impossible)
3. Use an aftermarket ECM such as the Holley Dominator which support 24x/58x and DBC and DBW. Again 6L80E support impossible.
While a few Stand Alone Transmission controllers support a 6L80E, that does change the fact that your 58x Gen IV ECM will not support DBC.
In short, trying to run a 6L80E with DBC is impossible with GM components and extremely complex & expensive in any case. DBW is the way to go.
01-21-2018, 07:50 PM
#30
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Murphy, do you already have the 6l80e?
Reason I ask is that IMHO a 6l80e is typically not a good choice for a classic car; this has been discussed many times in the Automatic Transmission section (which I moderate).
Some people buy the entire drivetrain including the LS3 and 6L80E, and then also get the ECM, TCM and electronic throttle pedal. Is this what you have? If yes, then it sounds like you plan major changes to make it DBC. One questions is - why are you trying to avoid the more desirable and modern DBW?
Next all factory ECM (Gen IV+) that support the 58x LS3 are DBW. There are basically three ways to run an LS3 as DBC:
1. Have the engine modified/build as a 24x and use a DBC PCM. (6L80E support impossible)
2. Use the Lingenfelter 58x to 24x conversion box and use a DBC PCM. (6L80E support impossible)
3. Use an aftermarket ECM such as the Holley Dominator which support 24x/58x and DBC and DBW. Again 6L80E support impossible.
While a few Stand Alone Transmission controllers support a 6L80E, that does change the fact that your 58x Gen IV ECM will not support DBC.
In short, trying to run a 6L80E with DBC is impossible with GM components and extremely complex & expensive in any case. DBW is the way to go.
Reason I ask is that IMHO a 6l80e is typically not a good choice for a classic car; this has been discussed many times in the Automatic Transmission section (which I moderate).
Some people buy the entire drivetrain including the LS3 and 6L80E, and then also get the ECM, TCM and electronic throttle pedal. Is this what you have? If yes, then it sounds like you plan major changes to make it DBC. One questions is - why are you trying to avoid the more desirable and modern DBW?
Next all factory ECM (Gen IV+) that support the 58x LS3 are DBW. There are basically three ways to run an LS3 as DBC:
1. Have the engine modified/build as a 24x and use a DBC PCM. (6L80E support impossible)
2. Use the Lingenfelter 58x to 24x conversion box and use a DBC PCM. (6L80E support impossible)
3. Use an aftermarket ECM such as the Holley Dominator which support 24x/58x and DBC and DBW. Again 6L80E support impossible.
While a few Stand Alone Transmission controllers support a 6L80E, that does change the fact that your 58x Gen IV ECM will not support DBC.
In short, trying to run a 6L80E with DBC is impossible with GM components and extremely complex & expensive in any case. DBW is the way to go.
I'm kind of figuring with the 6l80e it's gonna be not worth the trouble. From what people are telling me it's got to be the tuner that doesn't mess with the by wire on classics or he doesn't tune well. That's why I was asking about rune by frost. I would send in AL my components list and have him mail it back to me and keep the dbw. I just didn't want a dead pedal on install which is something people say can happen but once again hearing it's a bad wire or the tune. With the Trans it came with setup and I couldn't see anything wrong with more gears for a cruiser application and getting decent mpg and not a race one. I've talked to a few guys that have it and they love it but they all do away with the vvt and dod I was also wondering should I keep the vvt since my car is so heavy and Texas speed said a vvt cam can give you more power off the low end and all the way through the rpms any thoughts on keeping vvt or not keeping it for a 75 caprice convertible running larger wheels and wanting a street cruise application. With a yank torque converter with a 3200 stall and a tsp vvt-2 cam.
01-21-2018, 09:01 PM
#31
TECH Senior Member
To be honest, an LS W/O VVT will still be SO much stronger than what was in it that you won't miss VVT and its inherent hassles. If you put everything in the car that came out of the donor and hook everything up correctly, there should be no issues. LS engines are just STRONG, whether with VVT and DOD or without, there will be no comparison to the old drivetrain.
01-22-2018, 05:50 AM
#32
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To be honest, an LS W/O VVT will still be SO much stronger than what was in it that you won't miss VVT and its inherent hassles. If you put everything in the car that came out of the donor and hook everything up correctly, there should be no issues. LS engines are just STRONG, whether with VVT and DOD or without, there will be no comparison to the old drivetrain.
Does anyone on here know anyone running a 6l80e on a old school application with vvt or without.. Interested to hear about it
01-24-2018, 05:27 PM
#33
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To be honest, an LS W/O VVT will still be SO much stronger than what was in it that you won't miss VVT and its inherent hassles. If you put everything in the car that came out of the donor and hook everything up correctly, there should be no issues. LS engines are just STRONG, whether with VVT and DOD or without, there will be no comparison to the old drivetrain.
So even with a 6l80e l99 setup and vvt with dbc I'm interested
01-24-2018, 06:11 PM
#34
TECH Senior Member
Only Gen III controls have DBC capability. It is impossible to have VVT and DBC with GM controls. DBW is integral with the GenIV control setup.
01-24-2018, 08:48 PM
#35
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It is also impossible to have 6L80E and DBC with GM controls.
DBC requires an Idle Air Controller (IAC) and the GenIV ECM has no provision to support an IAC.
02-21-2018, 03:38 AM
#36
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Couple of questions how is that Spicer plate doing any vibration?
And PN: 3333586 can't find it
What did u use for the rear of the driveshaft that connected to the rear end a pinion yoke? I saw yukon had a nice one..
And PN: 3333586 can't find it
What did u use for the rear of the driveshaft that connected to the rear end a pinion yoke? I saw yukon had a nice one..
07-08-2018, 09:33 PM
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dbw to dbc 700r4 tv cable ok so im ls swaping my 89 s10 blazer with a 05 5.3 useing my 700r4 the ls is dbw the ecm is 12589463 hdw numb 12589162 i want to use my 700r4 but need to hook up a tv cable and need a dbc throttle body to make it work what do i do to make it work for me any info helps can i change the throttle body and ecm and im good to go or not bit off more then i can chew here
07-18-2018, 07:12 PM
#38
Moderator
Sorry that no one has replied, but you asking for nearly the impossible.
Some combination of parts, just because they bolt together, are not going to work together.
There might be a crazy complex fabrication solution to this, but it almost certainly would be simpler to use a 4L60E instead of the 700R4.
Is your speedometer electric or mechanical? If electric, using a 4L60E should be trivial. If mechanical, we need to discuss your options further.
Some combination of parts, just because they bolt together, are not going to work together.
There might be a crazy complex fabrication solution to this, but it almost certainly would be simpler to use a 4L60E instead of the 700R4.
Is your speedometer electric or mechanical? If electric, using a 4L60E should be trivial. If mechanical, we need to discuss your options further.
07-19-2018, 02:57 PM
#40
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You would run into the same problem with the 07-08 motor, they are DBW. Your best bet would be to sell the 05 motor and get a 02ish 5.3 with DBC. Then make a bracket to drive the 700r.
