Swapping from 4L60E to 700R4
11-11-2004, 04:19 PM
#1
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Car: All GM
Engine: All Chevy
Transmission: TH350 / 700R4 / 4L60E
Axle/Gears: custom GM 8-1/2" 456 posie
Swapping from 4L60E to 700R4
Swapping from 4L60E to 700R4
Can the computer controlled 4L60E transmission be replaced with a none computer controlled 700R4 in the late model F body?
I know it will fit, but I don’t know if the computer will need information from the transmission in order run correctly.
Can the computer controlled 4L60E transmission be replaced with a none computer controlled 700R4 in the late model F body?
I know it will fit, but I don’t know if the computer will need information from the transmission in order run correctly.
11-13-2004, 11:16 PM
#2
The TH4L60E was never installed in a ThirdGen. The TH700R4 should work just fine, provided the TCC solenoid, VSS, and 4th gear switch are connected to the ECM.
Hypothetically, if later vehicle with a TH4L60E received a TH700R4 as a replacement, the same VSS, 4th gear switch, and TCC solenoid would have to be connected. However, in the PCM's POST routine, it may scan the PCM for connected loads and determine that none of the three shift solenoids were connected, posssibly setting a DTC or more. Also, a TV cable would have to be installed in such a vehicle to modulate hydraulic pressure in the transmission, since a TH4L60E uses no such cable, but a solenoid valve in place of the mechanical pressure regulation system. There is also an oil temperature sensor in the typical 4L60E, and a PCM would interpret the disconnection of the sensor as a -40° reading and cause a DTC. If those obstacles could be overcome, the transmission should work fine. Of course, all that is purely hypothetical, since it wouldn't be related to a ThirdGen.
Hypothetically, if later vehicle with a TH4L60E received a TH700R4 as a replacement, the same VSS, 4th gear switch, and TCC solenoid would have to be connected. However, in the PCM's POST routine, it may scan the PCM for connected loads and determine that none of the three shift solenoids were connected, posssibly setting a DTC or more. Also, a TV cable would have to be installed in such a vehicle to modulate hydraulic pressure in the transmission, since a TH4L60E uses no such cable, but a solenoid valve in place of the mechanical pressure regulation system. There is also an oil temperature sensor in the typical 4L60E, and a PCM would interpret the disconnection of the sensor as a -40° reading and cause a DTC. If those obstacles could be overcome, the transmission should work fine. Of course, all that is purely hypothetical, since it wouldn't be related to a ThirdGen.
11-14-2004, 01:37 AM
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Car: 83 POS monte carlo 2015 chevy P/U
Engine: 92 5.7 tpi 5.3
Transmission: 700r4 6L60E
Axle/Gears: 2.42 too high
it would be easy enough, use a PCM programed for a standard trans, run the TCC through the fourth gear switch in the 700, & as Vader said get the stuff needed for the TV cable.
Vader, it could be ThirdGen related, if he has a LT1 or a LS1 with a trashed 4L60e & has a good 700 & is looking to put the engine in his GTA,
Vader, it could be ThirdGen related, if he has a LT1 or a LS1 with a trashed 4L60e & has a good 700 & is looking to put the engine in his GTA,
Last edited by DENN_SHAH; 11-14-2004 at 01:40 AM.
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