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STEVE1103 Member
Joined: 18 Mar 2006 Posts: 26 Location: LI NY and PA 609.94 points
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Posted: Thu Sep 09, 2010 11:35 am Post subject: 4L60 |
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Have a 91 4L60 from Camaro in my 47 Chevy, have a kit for the lock up converter, the electrical conn is OK, but the sending unit has no place on the 4L60 to be installed (book said it was a 700R). Do you have to drill and tap the case , someone said to do it on the servo cover, anyone have any info on this conversion?  |
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SMOKEmUP PostMaster

Joined: 30 May 2002 Posts: 3172
65175.84 points
1979 Chevrolet Camaro
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Posted: Thu Sep 09, 2010 3:04 pm Post subject: |
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What kit do you have?
To use the lockup wire the trans like this.
 _________________ Stop running from your pain and embrace your pain. Your pain is going to be a part of your prize.
I challenge you to push yourself. |
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clay Moderator

Joined: 24 Nov 2002 Posts: 3209 Location: South Carolina 318129.23 points
1972 Chevrolet Nova
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Posted: Thu Sep 09, 2010 4:27 pm Post subject: |
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I'm thinking you are talking about a pressure switch that goes inside the transmission. I tried a kit years ago that had a vacuum switch switch that would supposedly lock it up under high vacuum. It also had a manual lockup option that I used most of the time as I couldn't ever get the vacuum switch adjusted to work just right. It also had a switch to replace the factory switch (not sure why) that I'm assuming was located in a passage that gets pressurized in 3rd and 4th gear. Go ahead and drop the pan and it will make Smoke's wiring diagram make sense and you can actually follow the wires and see where they go. I have seen a kit that looks like it uses some sort of sending unit that installs in line with the speedometer cable and I would think it might be better able to be tuned to what you like but I never got around to using it as I stopped messing with the 200R4. Clay _________________ I have done so much with so little for so long, I can now do anything with nothing. |
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STEVE1103 Member
Joined: 18 Mar 2006 Posts: 26 Location: LI NY and PA 609.94 points
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Posted: Thu Sep 09, 2010 8:16 pm Post subject: 4L60 |
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I have a kit from Rebel wiring co. The unit ( looks like an oil pressure sending unit) it is suposed to go in a plugged hole to the left of the servo cover, the 700R has this but the 4L60 case don't. There is a ground wire, a 4 prong electrical plug, and a hot wire. |
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af2 Member

Joined: 01 Sep 2003 Posts: 5579 Location: grassvalley, ca 71896.24 points
1933 Willys Coupe
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Posted: Thu Sep 09, 2010 9:31 pm Post subject: Re: 4L60 |
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STEVE1103 wrote: | Have a 91 4L60 from Camaro in my 47 Chevy, have a kit for the lock up converter, the electrical conn is OK, but the sending unit has no place on the 4L60 to be installed (book said it was a 700R). Do you have to drill and tap the case , someone said to do it on the servo cover, anyone have any info on this conversion?  |
This is the early 700? Why does a vaccum switch matter?
A simple wiring like Smoke posted is the way it is.
I ran mine with a 3500 stall with no lock up and still cruised at 70 2100 rpm. |
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10sec.et Member

Joined: 29 Mar 2006 Posts: 3483 Location: Houston,Texas 347040.52 points
1969 Oldsmobile Cutlass
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Posted: Thu Sep 09, 2010 11:59 pm Post subject: |
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ok, im confused. do you have a 700R4 or a 4L60 ? if its a 4L60, arent they computer controlled ? _________________
af2 wrote: | It seems we can look at our magical Balls and come up with a fix?
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clay Moderator

Joined: 24 Nov 2002 Posts: 3209 Location: South Carolina 318129.23 points
1972 Chevrolet Nova
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Posted: Fri Sep 10, 2010 4:28 am Post subject: |
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Quote: | if its a 4L60, arent they computer controlled ? |
Nope, somewhere around 91 or 92, GM changed the designations on transmissions. 4L60 meant a 4 speed, longitudinal mount, and the 60 had something to do with a torque rating. In 93 they became the 4L60E for electronic control.
Quote: | Why does a vaccum switch matter?
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I used the TCI kit which had a vacuum switch that was supposed to control the lockup - high vacuum / light load it would lock up - low vacuum / higher load it would unlock. I played with it for a while and never liked it. I just used a toggle switch when I got on the interstate and it was never a big deal.
Quote: | it is suposed to go in a plugged hole to the left of the servo cover, |
Yep, I just went and looked at one I have and it does have the plug you mention. I'm guessing it must be a pressure check port for a 3 - 4 gear. That servo on the side applies the band for 2nd and 4th gear and also serves as an accumulator for the 2 -3 shift. I did actually sit down and figure out where and how fluid applied in the servo /accumulator assembly, but I've slept since then and I don't remember exaclty how it works now. Everything you need should already be in the transmission already. If you do hook it up per Smoke's diagram, keep in mind your transmission may have a temperature switch also which won't let it lock up until it reaches a certain temperature. On my S-10 it works out to around 160* water temperature. Clay _________________ I have done so much with so little for so long, I can now do anything with nothing. |
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STEVE1103 Member
Joined: 18 Mar 2006 Posts: 26 Location: LI NY and PA 609.94 points
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Posted: Fri Sep 10, 2010 10:20 am Post subject: 4L60 |
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I am not sure about your diagram, where do you get the brakes part from, I took all computer stuff off engine, running a Blazer intake, carb and distributor. Is this in the pan, have not worked on an automaic trans in years. Last one was in Vietnam, that was an allison 6 speed, now you know how old I am!!! Us old guys need a little help with this stuff. Thanks guys! |
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clay Moderator

Joined: 24 Nov 2002 Posts: 3209 Location: South Carolina 318129.23 points
1972 Chevrolet Nova
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Posted: Fri Sep 10, 2010 1:03 pm Post subject: |
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Hey, you're never too old to learn. I know on my S-10 it actually has the contacts inside the brake switch to control the converter lockup along with brake light operation which is what Smoke's diagram is showing - two sets of contacts inside a common switch. Power gets supplied through the toggle switch and then to the brake switch normally closed contacts and then to pin "A" on the 4 pin connector. Pin "D"supplies the ground for the internal solenoid that actually diverts fluid to control lockup. The brake switch in the circut makes the system work much better. Without it, the transmission will unlock the converter if you leave the toggle switch on when you come to a stop but it most likely won't unlock soon enough and you could get sort of a "chuggle" right before it unlocks. Don't let it intimidate you, once you get it you'll think it's really simple. Keep asking questions and you'll get it. Clay _________________ I have done so much with so little for so long, I can now do anything with nothing. |
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10sec.et Member

Joined: 29 Mar 2006 Posts: 3483 Location: Houston,Texas 347040.52 points
1969 Oldsmobile Cutlass
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Posted: Fri Sep 10, 2010 4:59 pm Post subject: |
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clay wrote: | Quote: | if its a 4L60, arent they computer controlled ? |
Nope, somewhere around 91 or 92, GM changed the designations on transmissions. 4L60 meant a 4 speed, longitudinal mount, and the 60 had something to do with a torque rating. In 93 they became the 4L60E for electronic control. |
i know im getting off track but whats the difference between a 700R4 and a 4L60 ? _________________
af2 wrote: | It seems we can look at our magical Balls and come up with a fix?
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STEVE1103 Member
Joined: 18 Mar 2006 Posts: 26 Location: LI NY and PA 609.94 points
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Posted: Fri Sep 10, 2010 6:05 pm Post subject: 4L60 |
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I know the case is different, I have a 700R in my garage, they look the same, but they are different. Was told by a good tranny guy that I can use the servo cover to install my sending unit, drill and tap or put in a bung. It will activate the converter, it has the fourth grear oil pressue need for this kit. |
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af2 Member

Joined: 01 Sep 2003 Posts: 5579 Location: grassvalley, ca 71896.24 points
1933 Willys Coupe
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Posted: Fri Sep 10, 2010 7:13 pm Post subject: |
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This thread is competely useless without pics of the 47!  |
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STEVE1103 Member
Joined: 18 Mar 2006 Posts: 26 Location: LI NY and PA 609.94 points
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Posted: Tue Sep 14, 2010 3:25 pm Post subject: 4L60 |
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Can't send my pictures, they are to big I think. Where do you pick up the brake in the diagram? Is this inside the trans? Thanks |
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af2 Member

Joined: 01 Sep 2003 Posts: 5579 Location: grassvalley, ca 71896.24 points
1933 Willys Coupe
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Posted: Tue Sep 14, 2010 6:54 pm Post subject: |
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Pin A needs to go through the NC on the brake switch so it opens on braking. Before the brake switch is 12 volts on the NC side. |
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squeeezer Member

Joined: 02 Mar 2007 Posts: 2427 Location: new richmond WI 191524.76 points
1991 Chevrolet Camaro
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Posted: Wed Sep 15, 2010 12:55 pm Post subject: |
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10sec.et wrote: | clay wrote: | Quote: | if its a 4L60, arent they computer controlled ? |
Nope, somewhere around 91 or 92, GM changed the designations on transmissions. 4L60 meant a 4 speed, longitudinal mount, and the 60 had something to do with a torque rating. In 93 they became the 4L60E for electronic control. |
i know im getting off track but whats the difference between a 700R4 and a 4L60 ? |
there is a little more to it but basically.........
700r4=mechanical hydraulics and speedo cable
4l60=mechanical hydraulics and v.s.s.
4l60e=all electronic some had removable bellhousing
4l65e=all electronic and lsx engines with removable bellhousing _________________
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