Any idea on what this 4 speed came out of?

[GrandpaKevin]

Trans has front and rear shifter mounts.

[B5 Six Pack]

It was assembled at the Lynch Road plant on January 23, 1970 for use in a B Body. That is based on the date code after PP833 being 3101, as it is hard for me to read for sure. O ( zero)  means 1970 model year and the A means the Lynch Rd plant which was building B bodies. The numbers on the top line after the O A, are the partial VIN of the specific vehicle. If the 4 digits after 833 on the second line are NOT 3101, you can google chrysler 10000 day calendar and get the exact day.

[GrandpaKevin]

Great info!

Thanks!

How about this one?'

It's an 18 spline with both shifter mounts.

[B5 Six Pack]

Assembled November 7, 1969  (3024) for use in a 1970 E body built at the Hamtramck plant. I believe the 18 splines means it came in a 440 or Hemi powered car, but not sure on that. In fact, I've never understood why 18 spline instead of 23 would come in the higher powered car. When dealing with racing axles, more splines are considered stronger.

[Chryco Psycho]

18 spline is a larger diameter shaft .

[GY3R/T]

Assembled November 7, 1969  (3024) for use in a 1970 E body built at the Hamtramck plant. I believe the 18 splines means it came in a 440 or Hemi powered car, but not sure on that. In fact, I've never understood why 18 spline instead of 23 would come in the higher powered car. When dealing with racing axles, more splines are considered stronger.

It's not just the spline count. The spline cut is different. Besides the fact a 23 spline outer diameter is about .990 and an 18 spline is about 1.175.

[B5 Six Pack]

Assembled November 7, 1969  (3024) for use in a 1970 E body built at the Hamtramck plant. I believe the 18 splines means it came in a 440 or Hemi powered car, but not sure on that. In fact, I've never understood why 18 spline instead of 23 would come in the higher powered car. When dealing with racing axles, more splines are considered stronger.

It's not just the spline count. The spline cut is different. Besides the fact a 23 spline outer diameter is about .990 and an 18 spline is about 1.175.

There it is. Thanks!

[6bblgt]

the Hamtramck 4-speed is from a Plymouth - if it has always been 18-spline it is from a "U", "V" or "R" code 'cuda - BS2??0B198982

[303 Mopar]

I have another one we are trying to identify. Apparently this is a OD unit and we're thinking of putting in a '73 Cuda with a 6.1. Also, if anyone knows what the gearing is supposed to be on this 4 speed OD, that would help!

[Chryco Psycho]

Transmission    1st    2nd    3rd    4th    Notes
1964 – 1966 A-body    3.09:1    1.92:1    1.40:1    1:1    Slant Six and Small Block engines. These transmissions had a short tailshaft and used a small 4.35″ input bearing retainer size.
1964 – 1970 B/RB engine    2.66:1    1.91:1    1.39:1    1:1    These transmissions had a long tailshaft with a single forward shifter mounts which is not on the same position as the later 1971-1974 transmissions. This is considered the "close ratio" V8 gearbox.
1966 – 1971 Hemi or 440 Six Pack engine    2.65:1    1.91:1    1.39:1    1:1    These transmissions had a long tailshaft with a single forward shifter mounts and a 1 1/8″ thick 18 spline input shaft. These are the heavy duty A-833 transmissions.
1967 – 1974 A-body    2.66:1    1.91:1    1.39:1    1:1    These transmissions had a short tailshaft are were the standard four speed offered in V8 A-bodies.
1970 only – Challenger T/A or AAR Cuda w/ 340 Six Pack    2.47:1    1.77:1    1.34:1    1:1    These transmissions had a long tailshaft with dual shifter mounts.
1970 – 1974 High Performance    2.44:1    1.91:1    1.34:1    1:1    These transmissions had a long tailshaft with dual shifter mounts.
1975 – 1987 Passenger Car Overdrive    3.09:1    1.67:1    1:1    0.73:1    These transmissions had a short tailshaft and used the large 5.125″ input bearing retainer size.
1975 – 1987 Truck Overdrive    3.09:1    1.67:1    1:1    0.71:1    These transmissions had a long tailshaft with dual shifter mounts and used the large 5.125″ input bearing retainer size.
1981 -1986 Chevy/GM Truck Overdrive    3.09:1    1.67:1    1:1    0.71:1    This A-833 used a 10 spline input shaft and had a bolt pattern specific to the GM A833 bellhousing. General Engines designated this transmission code MY6.