4t65e
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lol its not that difficult to read. translation:
In my gm build book I came across a section where it says you can manually shift if you wire up two switches to control the solenoid. How could you do this?
In my gm build book I came across a section where it says you can manually shift if you wire up two switches to control the solenoid. How could you do this?
Senior Member
Joined: 07-16-06
Posts: 1,139
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From: Tampa, FL
You have to use a manual shift controller availible from
Here's what is says directly from the GM Build Book:
4T65E SHIFT ALGORITHM
The 4T65E transmission is shifted with two shift solenoids. The ground sides of the solenoids are pin A and pin B in the pass through connector. Pin E requires switched 12V. The shift algorithm of the 4T65E is:
SHIFT ALGORITHM OF THE 4T65E
Solenoid A Solenoid B
1st gear on on
2nd gear off on
3rd gear off off
4th gear on off
An easy and cheap way to shift the 4T65E is with two toggle switches. The toggle switches need to switch ground to pins A and B in the pass through connectors. To operate the transmission turn both switches on. This will put the transmission in 1st gear. To shift into 2nd gear shut off the switch to solenoid A off. To shift into 3rd gear shut off the switch to solenoid B. For 4th gear turn the switch for solenoid A back on.
TCI and CompuShift offer automatic shift controllers that will operate the 4T65E Transmission. These are excellent choices for street strip applications.
An inexpensive alternative for drag racing and occasional street use is the MSD Programmable shift controller part number 7559. (Fig. 234) This controller was developed to shift a Lenco type transmission. With a little ingenuity it can easily be adapted for use on the 4T65E transmission.
Two relays are needed to convert the system for this application. The MSDcontroller needs two inputs a: Launch / Reset and Shift Override. The Launch / Reset button resets the controller to first gear both in electrical outputs and in the shift sequence. The Shift Override button manually up-shifts the controller. In first gear the controller does not output a signal. When the 1-2 shift is made it turns on a 12v signal. When the 2-3 shift is made another 12V signal is turned on. Since the solenoid needs a ground to activate, relays are needed. Ground should be connected to the input of two relays. The Normally Closed output of the 1st relay should be connected to pin A on the transmission pass through connector. The normally closed output of the 2nd relay should be connected to pin B of the transmission pass through connector. One side of the coil of each relay should be connected to ground. The 1st shift output from the transmission controller should be connected to the other side of the coil of the 1st relay. The 2nd shift output from the transmission controller should be connected to the other side of the coil on the 2nd relay. The normally open side of the relay can be used for gear indicator lights. Two lights can be connected to power and the other side of the lights connected to the normally open side of the first and second relays.
When the transmission is in 1st both lights will be off, in second the 1st light will turn on and in 3rd the second light will come on.
MSDProgrammable Shift ControllerPN7559 (Fig. 234)
This is what I have to do my for my new 1400hp engine and 4T65E transmission
.
Here's what is says directly from the GM Build Book:
4T65E SHIFT ALGORITHM
The 4T65E transmission is shifted with two shift solenoids. The ground sides of the solenoids are pin A and pin B in the pass through connector. Pin E requires switched 12V. The shift algorithm of the 4T65E is:
SHIFT ALGORITHM OF THE 4T65E
Solenoid A Solenoid B
1st gear on on
2nd gear off on
3rd gear off off
4th gear on off
An easy and cheap way to shift the 4T65E is with two toggle switches. The toggle switches need to switch ground to pins A and B in the pass through connectors. To operate the transmission turn both switches on. This will put the transmission in 1st gear. To shift into 2nd gear shut off the switch to solenoid A off. To shift into 3rd gear shut off the switch to solenoid B. For 4th gear turn the switch for solenoid A back on.
TCI and CompuShift offer automatic shift controllers that will operate the 4T65E Transmission. These are excellent choices for street strip applications.
An inexpensive alternative for drag racing and occasional street use is the MSD Programmable shift controller part number 7559. (Fig. 234) This controller was developed to shift a Lenco type transmission. With a little ingenuity it can easily be adapted for use on the 4T65E transmission.
Two relays are needed to convert the system for this application. The MSDcontroller needs two inputs a: Launch / Reset and Shift Override. The Launch / Reset button resets the controller to first gear both in electrical outputs and in the shift sequence. The Shift Override button manually up-shifts the controller. In first gear the controller does not output a signal. When the 1-2 shift is made it turns on a 12v signal. When the 2-3 shift is made another 12V signal is turned on. Since the solenoid needs a ground to activate, relays are needed. Ground should be connected to the input of two relays. The Normally Closed output of the 1st relay should be connected to pin A on the transmission pass through connector. The normally closed output of the 2nd relay should be connected to pin B of the transmission pass through connector. One side of the coil of each relay should be connected to ground. The 1st shift output from the transmission controller should be connected to the other side of the coil of the 1st relay. The 2nd shift output from the transmission controller should be connected to the other side of the coil on the 2nd relay. The normally open side of the relay can be used for gear indicator lights. Two lights can be connected to power and the other side of the lights connected to the normally open side of the first and second relays.
When the transmission is in 1st both lights will be off, in second the 1st light will turn on and in 3rd the second light will come on.
MSDProgrammable Shift ControllerPN7559 (Fig. 234)
This is what I have to do my for my new 1400hp engine and 4T65E transmission
.
Last edited by RollermanDan; Sep 14, 2007 at 03:55 AM.
Junior Member
Joined: 05-24-07
Posts: 468
Likes: 0
From: Rock Hill, SC
You have to use a manual shift controller availible from
Here's what is says directly from the GM Build Book:
4T65E SHIFT ALGORITHM
The 4T65E transmission is shifted with two shift solenoids. The ground sides of the solenoids are pin A and pin B in the pass through connector. Pin E requires switched 12V. The shift algorithm of the 4T65E is:
SHIFT ALGORITHM OF THE 4T65E
Solenoid A Solenoid B
1st gear on on
2nd gear off on
3rd gear off off
4th gear on off
An easy and cheap way to shift the 4T65E is with two toggle switches. The toggle switches need to switch ground to pins A and B in the pass through connectors. To operate the
transmission turn both switches on. This will put the transmission in 1st gear. To shift into 2nd gear shut off the switch to solenoid A off. To shift into 3rd gear shut off the
switch to solenoid B. For 4th gear turn the switch for solenoid A back on.
does not output a signal. When the 1-2 shift is made it turns on a 12v signal. When the 2-3 shift is made another 12V signal is turned on. Since the solenoid needs a ground to
activate, relays are needed. Ground should be connected to the input of two relays. The Normally Closed output of the 1st relay should be connected to pin A on the transmission
pass through connector. The normally closed output of the 2nd relay should be connected to pin B of the transmission pass through connector. One side of the coil of each relay
should be connected to ground. The 1st shift output from the transmission controller should be connected to the other side of the coil of the 1st relay. The 2nd shift output from the
transmission controller should be connected to the other side of the coil on the 2nd relay. The normally open side of the relay can be used for gear indicator lights. Two lights
can be connected to power and the other side of the lights connected to the normally open side of the first and second relays.
TCI and CompuShift offer automatic shift controllers that will operate the 4T65E Transmission. These are excellent choices for street strip applications. An inexpensive alternative for drag racing and occasional street use is the MSD Programmable shift controller part number 7559. (Fig. 234) This controller was developed to shift a Lenco type transmission. With a little ingenuity it can easily be adapted for use on the 4T65E transmission. Two relays are needed to convert the system for this application. The MSDcontroller needs two inputs a: Launch / Reset and Shift Override. The Launch / Reset button resets the controller to first gear both in electrical outputs and in the shift sequence. The Shift Override button manually up-shifts the controller. In first gear the controller does not output a signal. When the 1-2 shift is made it turns on a 12v signal. When the 2-3 shift is made another 12V signal is turned on. Since the solenoid needs a ground to activate, relays are needed. Ground should be connected to the input of two relays. The Normally Closed output of the 1st relay should be connected to pin A on the transmission pass through connector. The normally closed output of the 2nd relay should be connected to pin B of the transmission pass through connector. One side of the coil of each relay
should be connected to ground. The 1st shift output from the transmission controller should be connected to the other side of the coil of the 1st relay. The 2nd shift output from the
transmission controller should be connected to the other side of the coil on the 2nd relay. The normally open side of the relay can be used for gear indicator lights. Two lights
can be connected to power and the other side of the lights connected to the normally open side of the first and second relays.
When the transmission is in 1st both lights will be off, in second the 1st light will turn on and in 3rd the second light will come on.
MSDProgrammable Shift ControllerPN7559 (Fig. 234)
This is what I have to do my for my new 1400hp engine and 4T65E transmission.
Here's what is says directly from the GM Build Book:
4T65E SHIFT ALGORITHM
The 4T65E transmission is shifted with two shift solenoids. The ground sides of the solenoids are pin A and pin B in the pass through connector. Pin E requires switched 12V. The shift algorithm of the 4T65E is:
SHIFT ALGORITHM OF THE 4T65E
Solenoid A Solenoid B
1st gear on on
2nd gear off on
3rd gear off off
4th gear on off
An easy and cheap way to shift the 4T65E is with two toggle switches. The toggle switches need to switch ground to pins A and B in the pass through connectors. To operate the
transmission turn both switches on. This will put the transmission in 1st gear. To shift into 2nd gear shut off the switch to solenoid A off. To shift into 3rd gear shut off the
switch to solenoid B. For 4th gear turn the switch for solenoid A back on.
does not output a signal. When the 1-2 shift is made it turns on a 12v signal. When the 2-3 shift is made another 12V signal is turned on. Since the solenoid needs a ground to
activate, relays are needed. Ground should be connected to the input of two relays. The Normally Closed output of the 1st relay should be connected to pin A on the transmission
pass through connector. The normally closed output of the 2nd relay should be connected to pin B of the transmission pass through connector. One side of the coil of each relay
should be connected to ground. The 1st shift output from the transmission controller should be connected to the other side of the coil of the 1st relay. The 2nd shift output from the
transmission controller should be connected to the other side of the coil on the 2nd relay. The normally open side of the relay can be used for gear indicator lights. Two lights
can be connected to power and the other side of the lights connected to the normally open side of the first and second relays.
TCI and CompuShift offer automatic shift controllers that will operate the 4T65E Transmission. These are excellent choices for street strip applications. An inexpensive alternative for drag racing and occasional street use is the MSD Programmable shift controller part number 7559. (Fig. 234) This controller was developed to shift a Lenco type transmission. With a little ingenuity it can easily be adapted for use on the 4T65E transmission. Two relays are needed to convert the system for this application. The MSDcontroller needs two inputs a: Launch / Reset and Shift Override. The Launch / Reset button resets the controller to first gear both in electrical outputs and in the shift sequence. The Shift Override button manually up-shifts the controller. In first gear the controller does not output a signal. When the 1-2 shift is made it turns on a 12v signal. When the 2-3 shift is made another 12V signal is turned on. Since the solenoid needs a ground to activate, relays are needed. Ground should be connected to the input of two relays. The Normally Closed output of the 1st relay should be connected to pin A on the transmission pass through connector. The normally closed output of the 2nd relay should be connected to pin B of the transmission pass through connector. One side of the coil of each relay
should be connected to ground. The 1st shift output from the transmission controller should be connected to the other side of the coil of the 1st relay. The 2nd shift output from the
transmission controller should be connected to the other side of the coil on the 2nd relay. The normally open side of the relay can be used for gear indicator lights. Two lights
can be connected to power and the other side of the lights connected to the normally open side of the first and second relays.
When the transmission is in 1st both lights will be off, in second the 1st light will turn on and in 3rd the second light will come on.
MSDProgrammable Shift ControllerPN7559 (Fig. 234)
This is what I have to do my for my new 1400hp engine and 4T65E transmission
.
Junior Member
Joined: 05-24-07
Posts: 468
Likes: 0
From: Rock Hill, SC
ive found the 4t65e for about 400 out of sc buicks and all that and im sure they can handle good amount of power stock and im sure it wont cost too much to build up. you have a link to that adapter plate???
Junior Member
Joined: 05-24-07
Posts: 468
Likes: 0
From: Rock Hill, SC
Alright guys well i been talking to a guy whos been very helpful and patient with me. From what i hear also he's very knowledgable about the 5 speeds in our SS/SC. He told me that him and alot of other saab guys have been running 400hp+ on stock trannies and slicks. He also told me that just dont abuse the tranny and do no 6000 rpm clutch drops. Im guessing the problem with people breaking trannies with slicks even though they have no wheel hop is that they are dumping the clutch way to high in the rpms.
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