I am looking to do the 2 speed to 3 speed wiper conversion for an E body, will have non rallye dash in for now at least. I did a search but was unable to find a post on it. I thought there was a while ago. It might have aged out. Anyway, I am looking to see what exactly I need to do the swap and if the switch works with both non rallye and rallye dash setups.

This is what I remember that I will need:

3 speed wiper switch
3 speed wiper motor (can it be other than an E body, just change clocking? How to change clocking if not e body donor?)
3 speed wiper motor arm that attaches directly to wiper motor (are the the arms that are under the dash the same or are they different as well?)
Anything else I missed?

Also, are parts available to restore these with a good core? I am talking about the wiring to the motor and plug; I think I saw the gasket available from someone but not recalling who. I am not looking for a "100 point" resto,, just a decent looking unit that I could do myself.

Thanks

the under cowl crank & drive link are different

What year car do you have 70-71 is different than 72-74

I have a 71

I think you need the switch and 3 speed motor, maybe the lever that goes to the linkage under the cowl also, I'm not sure about that
I converted my old pump gas Duster (put a low deck six pack set up on the motor) to a 3 speed out of a B body and used those parts in it The stock one stuck out towards the carb to far to clear the six pack intake and carbs
That was when I lived in the Mojave Desert in SO CA so I really didn't them but I wanted it to be street legal so they went on that car, worked good too

You need the 70-71 switch to fit your wiring harness not the 72-74 switch. The wiper motor can be sourced from any year of car if you’re not wanting correct numbers. The 077 motor is more pricy. You have to get an ebody crank to fit the correct year model of motor. The arm is different as well. I just sold a complete restored setup to a customer for his 70 Cuda. I used two guys on the board here for work and parts that I did not have. I think the total bill was a little over $1000. It was a 73 motor and crank with a converted variable switch. It was a c body switch converted over to fit an ebody. Finding a 380 switch is more expensive and you can’t read the part number once installed anyway. NS1AAR and Devinism can help you out.

Thanks all for the info. Definitely would need to know more about switches and especially converting another model switch to work.

I had a hard time finding the 2822293 link( from crank to left pivot) when converting mine over, eventually found one. There's a guy in Canada selling a "kit" to modify a 2 speed link if you don't have any luck.

https://www.ebay.com/itm/204243821262?hash=item2f8de162ce:g:IasAAOSwGwlaDIGn&amdata=enc%3AAQAHAAAAoEft%2Bg5yfWMWAmkO%2Fhzfr7F9ig8RwGeraXDEogPQ%2Fh1HMhnKf0JtckIGZFJF967ikV7YcnRwD3qGFchrMdIeWbYDEOLIvleJ7CMqvVD8CJrw%2FbXg%2BMzFEJA4lxRPdMGjnN3b8oG3H%2BA1ydS4YA78oUsitPH%2BMRYKLmJDOjGcF8RROb55tBGo5ecC%2BGis%2BGg1D7XCKWlJgT0RwXmgWYlltxg%3D%7Ctkp%3ABk9SR6rNmefRYQ

Thanks for the link.

https://www.ebay.com/itm/204243821262?

You need switch #2770380 it's variable speed not 3-speed like the 72-74. They will not interchange.

Shop around they're expensive.

https://www.ebay.com/itm/255971284566?


The 3 speed wiper and variable motors are the same. The wiring in the harness is the difference. If number matching isn't a a problem you can use the latter cheaper replacements. You just have to clock them to your car.

The switch can be expensive when sold as an E body one but A body uses the same switch soooooooooooo.

Yes, looks like the one in my 65 Cuda

A body part number would be 2770378, the below statement was taken from another forum....

Yes, the 2770378 will work in place of the 380. Slight difference in the knob shaft length, but they work just fine in an E body.

The E-body uses a 25 OHM switch Red dot on switch

What years for the switch if getting from a bodies? Do I use the a body knob or can I use my 2 speed knob?

70-71 FPM shows 2770380 V-switch for B,J,V and L. I've swapped them between A and E bodies many times.
Just use the E body knob.

Not 100% correct. The wiring is the same for any 3 speed harness.
It's the plastic spade ends that can be changed to use either switch.
The later year just used a single plastic holder.

a 72-74 switch has simalar terminals as a 70-71 switch and will plug right in. There are two connectors that go on the switch on the 70-71. If you only connect the bigger plug you will get 1 speed and park out of the 72-74 switch but if you try to connect the other 2 wire plug it will smoke the wiring.

The switch in my hand is a 70-71 correct 380 switch the other is a factory E-body 72-74 3-speed.

The motors operate the same for either years. Thus the wiring is the same. You just have to rearrange the wiring onto the plastic connectors to make it happen.