Transmission Electrical Connections
Posted: Mon 19 Nov, 2012 1:47 pm
Okay so after Saturdays incident with the gearbox in my new sierra I finally had the motivation on Sunday to pull my good gearbox from the old blue sierra.
Once I had both on the bench I was deciding how to mark them in some way so I didn't confuse them, at the same time I was fiddling with the input shaft of the broken gearbox and it became very obvious how to tell them apart, one sounds like a rock cruncher and the other is silent.
Anyway my question is to do with the electrical connections on the transmission. The good gearbox from my blue sierra had 4 sets of wires connected.
The bad gearbox only had 3 sets connected with the 4th having been removed at some point. There are 3 connectors that are of the same type,
these are all connected the 4th connector that screws into the gearbox horizontally is the one that has been snipped.
So do i need the 4th switch or not?
I read this somewhere: the "fifth gear" switch turns the EGR off. The EGR valve sends a small amount of exhaust back into the engine. this lower the combustion tempeture and reduces NOX, a smog forming compound, but the trade off is that the engine produce less power.
So I am assuming the 4th switch that has been cut is this 5th gear switch.
Once I had both on the bench I was deciding how to mark them in some way so I didn't confuse them, at the same time I was fiddling with the input shaft of the broken gearbox and it became very obvious how to tell them apart, one sounds like a rock cruncher and the other is silent.
Anyway my question is to do with the electrical connections on the transmission. The good gearbox from my blue sierra had 4 sets of wires connected.
The bad gearbox only had 3 sets connected with the 4th having been removed at some point. There are 3 connectors that are of the same type,
these are all connected the 4th connector that screws into the gearbox horizontally is the one that has been snipped.
So do i need the 4th switch or not?
I read this somewhere: the "fifth gear" switch turns the EGR off. The EGR valve sends a small amount of exhaust back into the engine. this lower the combustion tempeture and reduces NOX, a smog forming compound, but the trade off is that the engine produce less power.
So I am assuming the 4th switch that has been cut is this 5th gear switch.
