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6L80/90 options...?

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Old Nov 3, 2019 | 03:33 AM
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Question 6L80/90 options...?

Need to know, is there a way to set up this type of trans to take off only in second gear?

For the application I'm using (behind a Model B engine, 1932 4-cyl.) It's built for performance. The original Model A/B trans has 3.11 first gear, this is too tight for a performance- built "B" engine.

If I use a 4.11, this will be a perfect trans gear selection for my car.

And, can I modify the trans to run without a computer?
Old Nov 3, 2019 | 03:39 AM
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Btw, the stock B engine made 50 hp, mine is going to pushing between 150 and 200 hp. In a 2200lb car, it will move nicely with the two OD gears of the 6L80/90!

These engines typically make their power down in low Rpm, but this one has a performance cam optimized for 1600-3000 rpm, but will go higher if needed. Redline is just over 4,000 rpm.

Last edited by Eli McCrae; Nov 3, 2019 at 03:44 AM. Reason: misspelling
Old Nov 3, 2019 | 03:41 AM
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Also, forgot to mention that age and life has made it my better interest to run an automatic in my rig, lol.

It would be much easier to run a suitable manual trans. Thanks for any suggestions in advance.
Old Nov 4, 2019 | 07:04 AM
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saying a low gear is too tight for a performance engine makes a total of about no sense
are you saying it will just do burnouts anytime it is in 1st gear? I don't get it
Old Nov 4, 2019 | 04:03 PM
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Never mind, looks like I came to the wrong site.

Sorry to waste your time.
Old Nov 4, 2019 | 06:55 PM
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Originally Posted by Eli McCrae
Need to know, is there a way to set up this type of trans to take off only in second gear?

For the application I'm using (behind a Model B engine, 1932 4-cyl.) It's built for performance. The original Model A/B trans has 3.11 first gear, this is too tight for a performance- built "B" engine.

If I use a 4.11, this will be a perfect trans gear selection for my car.

And, can I modify the trans to run without a computer?
The 6L family of transmissions currently have no options available to run without a computer.
These transmissions use a computer (TCM) inside the case attached to the valve-body.

Aftermarket standalone transmission control modules (computers) could be used to operate the 6L transmission in your application.
However, you would have to find someone to write a program for you... as well as integrate some sensors to your engine.

At that point the transmission could be configured to not use first gear...
Second gear being a 2.37:1 ratio. lets call it 2.4.

I would just go with a THM200-4R transmission instead. It has a 2.7 first gear... the difference between 2.4 and 2.7 is not really noticeable (especially with taller ring and pinion gear sets).
The THM200-4R has the same approximate over-drive gear ratio...(0.67:1 = 200-4R and 0.67:1 = 6L transmission).
The THM200-4R also is not a computer controlled transmission.
Seems like it meets everything you said you were looking for.

I see no need to over complicate things by having to go with aftermarket standalone control modules and custom written software; when a THM200-4R is very similar in terms of what you were looking for in the 6L transmissions.

Last edited by vorteciroc; Nov 4, 2019 at 07:54 PM.
Old Nov 5, 2019 | 07:28 AM
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After some searching, I noticed one adapter kit site has an adapter for that very thing.
Thanks for your response.
Old Nov 5, 2019 | 07:57 AM
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Originally Posted by Eli McCrae
Never mind, looks like I made a silly post.

Sorry to waste your time.
Fixed for you
Old Nov 6, 2019 | 07:53 AM
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Originally Posted by ddnspider
fixed for you
Hahahaha
Old Nov 6, 2019 | 08:42 AM
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Originally Posted by Eli McCrae
Never mind, looks like I came to the wrong site.

Sorry to waste your time.
You did. lol


no, that trans cannot be made to run non electronic.

Why on earth would you want to take off in 2nd gear? when a camaro that has 500+hp takes off just fine in 1st, i think your little 200hp 4 cylinder will be just fine.
Old Nov 6, 2019 | 08:43 AM
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Originally Posted by vorteciroc
The 6L family of transmissions currently have no options available to run without a computer.
These transmissions use a computer (TCM) inside the case attached to the valve-body.

Aftermarket standalone transmission control modules (computers) could be used to operate the 6L transmission in your application.
However, you would have to find someone to write a program for you... as well as integrate some sensors to your engine.

At that point the transmission could be configured to not use first gear...
Second gear being a 2.37:1 ratio. lets call it 2.4.

I would just go with a THM200-4R transmission instead. It has a 2.7 first gear... the difference between 2.4 and 2.7 is not really noticeable (especially with taller ring and pinion gear sets).
The THM200-4R has the same approximate over-drive gear ratio...(0.67:1 = 200-4R and 0.67:1 = 6L transmission).
The THM200-4R also is not a computer controlled transmission.
Seems like it meets everything you said you were looking for.

I see no need to over complicate things by having to go with aftermarket standalone control modules and custom written software; when a THM200-4R is very similar in terms of what you were looking for in the 6L transmissions.

I would listen to this advice.
Old Nov 6, 2019 | 07:04 PM
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Kfxguy- 2nd gear- because first gear would be 4 to 1 with that trans.

My stock 1st gear ratio is already too low @ 3:11.

Does that make sense to you now?

With a 4.11 rearend (mine...), this would make those two OD's in the 6L just great!

But I bet you aren't smart enough to figure that out. Just smart enough to pick on a new poster. How brilliant!!

I would never have expected that...lol

Last edited by Eli McCrae; Nov 6, 2019 at 07:09 PM.
Old Nov 6, 2019 | 09:53 PM
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Originally Posted by Eli McCrae
Kfxguy- 2nd gear- because first gear would be 4 to 1 with that trans.

My stock 1st gear ratio is already too low @ 3:11.

Does that make sense to you now?

With a 4.11 rearend (mine...), this would make those two OD's in the 6L just great!

But I bet you aren't smart enough to figure that out. Just smart enough to pick on a new poster. How brilliant!!

I would never have expected that...lol
If you're trying to look smart, you're doing a bad job
Old Nov 7, 2019 | 07:58 AM
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Originally Posted by Eli McCrae
Kfxguy- 2nd gear- because first gear would be 4 to 1 with that trans.

My stock 1st gear ratio is already too low @ 3:11.

Does that make sense to you now?

With a 4.11 rearend (mine...), this would make those two OD's in the 6L just great!

But I bet you aren't smart enough to figure that out. Just smart enough to pick on a new poster. How brilliant!!

I would never have expected that...lol
you just joined this month and you are already saying “eff you” to people? Your stay will be short lived I hope. I wish you bad luck on your idiotic adventure with your ignorant train of thought and your dumb project.
Old Nov 7, 2019 | 01:29 PM
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Originally Posted by Kfxguy
you just joined this month and you are already saying “eff you” to people? Your stay will be short lived I hope. I wish you bad luck on your idiotic adventure with your ignorant train of thought and your dumb project.
I came here in peace, looking for intelligent answers. And most what I got was automatic arrogance... What do you expect?
And you are right, my stay will be short lived here. You and your "friendly, helpful minions" are the reason. It's not like I'm a punk kid, I'm 55 and been through more crap than you know. So, dog off...It's pretty lame when a new man comes here in peace, expecting advice and is met with instant juvenile delinquent-style harassment. And then you blame me for giving it back. Try going to a local bar and bring that crap attitude, I dare you!. I'd love to see how that works for you.

And what a real man you are, wishing someone bad luck. You are a *****. I'm gone... At least I'm not going to wish you bad luck, takes a callous bastard to do that. You'll get what you deserve in life, guaranteed. And I didn't come here insulting anyone's "dumb project" either. That's low class trash.
Old Nov 7, 2019 | 01:37 PM
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For someones whose "been through more than you know", you have pretty thin skin. Your first response on here was:
Originally Posted by Eli McCrae
Never mind, looks like I came to the wrong site.

Sorry to waste your time.
Don't be so sensitive. You asked a silly question, received multiple replies stating what to do instead, and cried about it.
Old Nov 7, 2019 | 01:40 PM
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Originally Posted by ddnspider
For someones whose "been through more than you know", you have pretty thin skin. Your first response on here was:

Don't be so sensitive. You asked a silly question, received multiple replies stating what to do instead, and cried about it.
Exactly. And then he said “eff you” to the guy above. It was deleted but I saw it in my email. That wasn’t juvenile? He deserved my reply for that.
Old Nov 7, 2019 | 01:43 PM
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Originally Posted by Kfxguy
Exactly. And then he said “eff you” to the guy above. It was deleted but I saw it in my email. That wasn’t juvenile? He deserved my reply for that.
He may have been reported for that comment Now acts like he's so high class and you should go to a bar after HE dropping the F Bomb on another member on here Get out of here with that crap.
Old Nov 8, 2019 | 11:06 AM
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This one just didn't launch well. Must be that pesky low first gear ratio at fault.




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