AussieCorvetteNut
Well-known member
Hi Guys,
I am like many out there that are having trouble sourcing ball switches for the side of the Doug Nash 4+3 Transmission System.
I can locate GM 14057528, the Overdrive Override switch 3rd - 4th (which is also the back up switch), but I cannot locate GM 14057529 the Overdrive Override switch 1st - 2nd...GM in their wisdom decided to discontinue the part...very smart fellas!
The difference from what I can make out, is that one switch is naturally open circuit switch and the other is naturally closed.
I am pulling the DNE 4+3 out of the 84 on the 26th December to rebuild both the 4 speed and the overdrive unit, as I have rebuild kits for both...thanks Ecklers.
While I am there, I would like to replace these ball switches, but they are rare.
Can anyone help with where I could look to buy these units?
Rock Auto has GM 14057528 for a few dollars, but not GM 14057529.
The plan then is to bypass the computer for the operation of the OD, as my console switch is operational, I can use it to manually engage the OD.
From what I have researched on the internet, you can bypass the ECM and take all the smarts out of the system. If you pull terminal A7 on the 24 pin cluster and pull terminal C7 on the 32 pin cluster and then join these two, it bypasses the ECM. You basically end up with over-drive in all 4 gears...an 8 speed 84 Corvette.
Do any of you have any thoughts on this?
Appreciate your help.
Tony
I am like many out there that are having trouble sourcing ball switches for the side of the Doug Nash 4+3 Transmission System.
I can locate GM 14057528, the Overdrive Override switch 3rd - 4th (which is also the back up switch), but I cannot locate GM 14057529 the Overdrive Override switch 1st - 2nd...GM in their wisdom decided to discontinue the part...very smart fellas!
The difference from what I can make out, is that one switch is naturally open circuit switch and the other is naturally closed.
I am pulling the DNE 4+3 out of the 84 on the 26th December to rebuild both the 4 speed and the overdrive unit, as I have rebuild kits for both...thanks Ecklers.
While I am there, I would like to replace these ball switches, but they are rare.
Can anyone help with where I could look to buy these units?
Rock Auto has GM 14057528 for a few dollars, but not GM 14057529.
The plan then is to bypass the computer for the operation of the OD, as my console switch is operational, I can use it to manually engage the OD.
From what I have researched on the internet, you can bypass the ECM and take all the smarts out of the system. If you pull terminal A7 on the 24 pin cluster and pull terminal C7 on the 32 pin cluster and then join these two, it bypasses the ECM. You basically end up with over-drive in all 4 gears...an 8 speed 84 Corvette.
Do any of you have any thoughts on this?
Appreciate your help.
Tony