What's your 3 Speed Wiper motor date?

[Cuda Cody]

That's great to know!

Wiper motor date codes changed every 7 days

[HP2]

'74 Challenger
JH23
SPD  824
motor is 2323

[Skdmark]

JS23N1B
SPD 520
1161

BH23G1B
SPD 812
1870

[6bblgt]

1970 BS23U0B:

3-speed wiper - 2659 = 265th day of 1969 * Monday September 22, 1969
SPD - A09 = Thursday October 9, 1969 (actually "In Plant/In Process" on Saturday 10/11/69)

17 days before "scheduled" & 19 days before "actual"

[6bblgt]

1970 JS23N0B:

3-speed wiper - 1870 = 187th day of 1970 * Monday July 6, 1970
SPD - 702 = Thursday July 2, 1970 (actually "In Plant/In Process" on/after* Friday 7/17/70)

4 days after "scheduled" & ~11 days before "actual"

* K-frame is dated - 1980 = 198th day of 1970 * Friday July 17, 1970

[6bblgt]

BH23G1B
SPD 812
1870

@Skdmark - I just noticed your '71 Barracuda's wiper motor is the same date as my '70 R/T's

@Ns1aar or anyone, when did they stop using the red Glyptal?  I thought it was for '71 but my wiper motor has no remnants

were there numerous vendors or just 73692, do "WE" know who this was?

@Cuda Cody  -  maybe add the part numbers to the first post to confirm at what dates the stamped part numbers actually changed on the assembly line

1970 = 3431077
1971 = 3431077
1972 = 3431534 early before 9/1/71
1972 = 3431624 late after 9/1/71
1973 = 3431665
1974 = 3431906

[1 Wild R/T]

SPD A13, actual production date appears to be around A31
Wiper Date  Stamping...  2939

[headejm]

@Ns1aar or anyone, when did they stop using the red Glyptal?  I thought it was for '71 but my wiper motor has no remnants

@6bblgt  My SPD 508, 1030 date code has no sign of the red Glyptal paint. Maybe others can chime in on what is on their wiper motor and we can figure it out?

[Ns1aar]

It seems the red insulating varnish disappears early 70 and comes back in 72 although I have seen some in that time frame with it on them. Could be replacement motors.

I have 3 vender codes here.

Prestolite 73691(went bankrupt date unknow) seems to 70 A/B and earlier based on what I have on hand and pics
I'm assuming 73692 is Prestolite( status unknow at this time) 70 E and most everything after 71
7280 unknow at this time so far I have only found these on 0820. I see these mostly on AAR's and T/A's. Could be a separate department for quick turnaround orders

[Skdmark]

This motor has signs of Glyptal on it.

JS23N1B
SPD 520
1161

Were the over the counter rebuild kits for the wiper motors be a possible explanation of the differences in switch plates?
It looks like Ma Mopar had several different kits over the years, the kit below looks like it is from '73 and has the plastic switch cover for example.

From the Ebay ad I grabbed the picture from :
"NOS Mopar 3620736 variable or 3 speed windshield wiper motor plate and latch repair package as pictured for 1969 1970 1971 1972 1973 1974 Plymouth, Dodge, Chrysler vehicles. Kit includes gear, latch, bushing, switch plate and grease and fits the following Chrysler wiper motors; 2926919, 2983033, 2983116, 3431077, 3431408, 3431532, 3434534, 3431535, 3431624, 3431632, 3431665, 3431666, 3431739.  Replaces NOS Chrysler Mopar 3420870, 3420918, 3837326, 4049727."

[198D13]

Wiper motor date codes changed every 7 days
This predates the 68 calender

FYI:
The first 3431 077 made had a date 0f 1609, every motor made after that was dated seven days later until the end of 1971 production. So, 1609, 1679, 1749, 1819, 1889, etc, etc. The last date for 1969 would be 3639, then the first date into 1970 would be 0050. If a date does not correspond exactly with this lineage, it is because someone has stamped a barrel himself, and it is not original. There are no exceptions.
BTW, the exact same dates and rules also apply to blower motors(A/C and non A/C) for your heater box, again on E Body cars.

[Northcuda]

1970 Barracuda BH23N08
Wiper 1819
No SPD ( No plate)
One of the first 3 Barracuda arrived in France in September 1969.

[Cudino]

Thanks Cody for doing this!  I can add the following (all 3 are 1077s from survivor cars):

BS23R0B
SPD 401
3079

BS23R0B
SPD 402
3079

JS23R1B
SPD 829
2220

- Wade

[floorit426]

BS23R0B
SPD A06
1749

[RusTy/SE]

Original 3431077 wiper unit to car;

307 9 Date code on wiper motor barrel - vehicle SPD of 109.