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2000 Silverado motor and trans swap trans problems

1K views 1 reply 2 participants last post by  Hogg  
#1 ·
Swapped stock 5.3 60e for a cammed 6.0 an built 60e the new trans only had R 1st, 2nd gear. Put in a stock trans that I know is good, put my 3200 stall in and this trans has everything but overdrive??? Currently has no tune but shouldn't mess with the transmission shifting
 
#2 ·
If you don't have any power to the trans shift solenoids, you should have 3rd gear as both the Solenoid A and Solenoid B are unpowered for 3rd gear on the 60e. For the 80e unpowered results in 2nd gear.



Shift solenoid strategy for the 4l60e/65e/70e
1st gear
Solenoid A=On Solenoid B=On
2nd Gear
A=Off Sol B=On
3rd Gear
A=Off B=Off
4th
A=On B=Off
Reverse
A=On B=On

On gears 2, 3, 4th and Reverse, the 3-2 shift solenoid is On, for Park, Reverse, Neutral 1st gear, it is Off.



For the 80e
1st gear
Solenoid A=On Sol. B=Off
2nd gear
A=Off B=Off
3rd
A=Off B=On
4th
A=On B-On
Reverse
A=On B=Off

The difference between the 2 transmissions is that the Solenoid A strategy is shared and the Solenoid B strategy is inverted.
This makes swapping between the 2 is rather easy wiring wise.

So with the above info you can see if the TCM is actually commanding the shift solenoids, or if its a problem in the trans. Scan tools like the Tech 2 can actually bi-directionally command gear selection and TCC lock/unlock as well.

Any 60e/65e tune should control any 60e/65e trans.

peace
Hog