What's different 70-71 vs 72-74 Wiper motors

Hi Nacho
The motor in the upper pic has the plastic cover over the wire connections, thats the 73-up style.
Lower one has resin thats the 72-down sytle.
Heres the early 72B/E 534 V-spd.

Ok, we're getting closer. In the 2 pics above, the connector looks the same.

So why (or what needs to be done) can't I use a 73 model.
I can buy it from RockAuto for $40.

70 version is NOT avaliable. Hoping to not pay $300 to have it rebuilt.

Didn't 72 use the clip for the wiper arm and the 73 use a nut ? My 72 Challenger 3 spd motor uses the clip and my 73 Roadrunner 3 spd motor but I'm pretty sure it uses a nut for the wiper arm.

I was thinking on that as a posibility HOWEVER, Once I got a NOS repairing kit and on instruction sheet never said something about the year, and included a big list of wiper motor PNs including earliers. The kit included the threated shaft.

I would say really the clip its at CRANK side of main linkage and not to the motor shaft side

The 71 and the 72 are not a straight interchange. The crank to wiper lingakge are a little different and if you use a 72 motor on a 71 (or vice versa) it won't bolt up to the crank arm. The 71 is the last year for the red epoxy on the front wire, the 72 is left bare (I think they put a plastic cover after that). The direct cowl boltup is the same, and the wire harness is the same. Two speed switches will not work on a var/3 speed, or vice versa.

Mo Mopar was horrible on the interchange between years in the 70's. I'm sure it had to do with sub contractor suppliers.

PN application:

Part#/Stamp# Year-Yr Body Speed Remarks


2525629 1964-66 A VARIABLE
2525270 1964-65 B SINGLE
2580915 1967 B VARIABLE
2584975 1965 C VARIABLE
2586988 1966-67 C 2/3 SPEED
2587697 1968 B 3-SPEED LATE
2770090 1968 C 2-SPEED
2770090 1969-71 A 2-SPEED
2770090 1969-70 B 2-SPEED
2770147 1966-67 AB VARIABLE WHITE SW PLATE PARTS
2808767 1967 AB VARIABLE LATE ALUM/BLACK PARTS
2808767 1968 B 3-SPEED EARLY ALUM/BLACK PARTS
2808801 1966 B VARIABLE WHITE SW PLATE PARTS
2808801 1967 AB VARIABLE WHITE SW PLATE PARTS
2822252 1968 AB 2-SPEED
2822962 1967-68 AB VARIABLE LATE ALUM/BLACK
2822963 1966-67 AB VARIABLE EARLY WHITE SW PLATE
2822965 1967 B VARIABLE
2889982 1968 B 3-SPEED LATE PARTS
2926919 1969-71 C 3-SPEED PCDY
2926929 1969-71 C 2-SPEED
2926929 1970-71 E 2-SPEED
2926929 1971 B 2-SPEED
2983033 1969 B 3-SPEED EARLY
2983116 1969-71 A VARIABLE
2983116 1969 B 3-SPEED LATE
2983116 1970 B 3-SPEED
3004112 1968 C 2-SPEED
3004114 1968 A VARIABLE
3004114 1968 B 3-SPEED LATE
3431077 1970-71 E VARIABLE
3431077 1971 B VARIABLE
3431531 1972 A 2-SPEED UP TO 6/5/72
3431532 1972 A VAR-3SP
3431533 1972 BCE 2-SPEED UP TO 6/5/72
3431534 1972 BE VAR-3SP UP TO 9/1/71
3431535 1972 C VAR-3SP
3431605 1972 A 2-SPEED AFTER 6/5/72
3431605 1973 A 2-SPEED UP TO 2/1/73
3431606 1972 BCE 2-SPEED AFTER 6/5/72
3431606 1973 BCE 2-SPEED UP TO 2/1/73
3431624 1972 BE VARI-3SPD AFTER 9/1/71 BLACK CAP
3431665 1973 BE VARI-3SPD
3431666 1973 C VARI-3SPD
3431718 1973 BCE 2-SPEED AFTER 2/1/73
3431730 1973-74 A 2-SPEED AFTER 2/1/73
3431780 1974 C 3-SPEED
3431790 1974 BCE 2-SPEED
3431905 1974 A 3-SPEED
3431906 1974 BE 3-SPEED
3620877 1973 A VARI-3SPD


( I thought this file was missed around http://web.archive.org/web/20050117073829/http://www.wiperman.homestead.com/Motor_part_numbers.html )

The 3431624 is a 3-sp and does not have the black cap.
Heres the one that came on one of my later 72's. Have had several more just like it.

MaMopar made everything in misterious ways LOL

Can I use a readily available 2 speed ’72 Charger wiper motor to replace my near impossible to find 2 speed ’71 Charger wiper motor?
*I realize I could get my ’71 2 speed motor restored/repaired, but all I’m looking for is a basic parts store price and quality

*The ’72 wiper motor looks the same as my ‘71, but I am aware that the ’71 B body uses wiper crank/pin arm 2822290, whereas the ’72 Charger uses wiper crank/pin arm 3431553

When I look at pictures online of these two crank arms, they look virtually the same?
So my question is: will I be able to use/mount my 2822290 crank arm on the ’72 motor?

Old post, but I ended up buying the 73 motor and it bolted up fine and is still working.
From memory the only difference was the size of the slot for the crank arm. I seem to remember the newer motor had a smaller shaft size (flat part). I cut a small shim and added it, but I honestly don't think it was needed.

Buy it local and try, if it doesn't work you can return it.

cnxt,

Thanks for the info. My local parts store has one coming this week. It is a A1-Cardone re-manufactured unit, part# 40-382. It crosses to ’72 Charger.

*After looking more closely at the 71 vs 72 crank arms – I agree- they look just slightly different, but nothing that a small modification (aka: like you mentioned: a possible shim) would make working fit.

I will post an update, after I try this conversion.

Thanks,
-miker71

* Attached pics: photos of the ’71 (2822290) and ’72 (3431553) crank arms *

Update for ’70 & ‘71 E-body, and ’71 B-body 2-Speed Wiper motor replacement:

Like cnxt said, the readily available/affordable parts store ’72 Charger(’73 Challenger) wiper motor is a direct bolt in and the ’71 linkage crank arm will bolt up, but is a bit loose due to the ’72 motor has a smaller shaft.

For me, this resulted in sloppy wiper action: The wipers wouldn’t cover as much windshield, and the would not park properly(wouldn’t hide away completely) – due to the slop.
Also, the ’72 motor shaft Parks/stops in a slightly different position (*this probably also attributes to not parking in the correct position).

Upon further investigation I found out the ’72 Crank arm motor shaft rectangular cutout is at a different angle than the ’71 Crank arm.
So, I purchased a ’72 crank arm(pt#3431553) on eBay to go on my ’72 motor. It fits perfectly w/no slop. Now my wipers work perfectly and park perfectly, - like brand new!