Does anyone know what 8 3/4 case a 340 auto car would have come with if it was a 3.23? Could it have come with a 741 case, or would it have been a 489?

Thanks in advance

pretty sure it would have been 489
741 and 742 cases were older models

I have two 1970 741 cars, behind a 318 & 383.

If you have a broadcast sheet for it, what is coded?

should be a 489

I don't have a broadcast sheet unfortunately, but the dates look right anyway. The car is a H1B402... vin, and the 741 gears are dated April of 1971. It looks like the small u-joint driveshaft that's in it is original.

My 71 340 Cuda with 3:23 open has a 741
Not sure if it is right or wrong yet.
Bob

My April 30 built 340 Cuda is coded for 019 Axle assembly on my build sheet which breaks down to a E body 3.23 S/G with 11 drum brakes 8.75 Rear end and a 1 7/8" Pinion and 7290 Yoke. A 1 7/8" pinion only came in 489 case.

Thanks for all of your replies. I wonder if it's possible that the sure-grip cars got the 489 case, and the open cars got the 741's?

I have a 71 challenger r/t N-code 383 HP with 3.23 open... 489 case

I know that the 741 was still in use for 1970 models in addition to the 489.

There is a chart with the 1970 information at http://www.hamtramck-historical.com/images/TSBs/1970/D70-3-2%20page4.jpg

My 1970 Valiant has a 3.23 741 while my 1970 Fury has a 3.23 489 & both are open with the small yoke.

Both are called out on their broadcast sheets.

I know a low mile 71 Demon 340 3.23 open, LA plant, with 741 case.

Do you have a chart for 71?

My 71 340 has axle code 015 - should be a 3.23 open

I have a Nov.5 1970 SPD, build 383 1971 Cuda automatic that came with a 489 sure grip. One other in my family had a 1971 Cuda built in Dec. of 1970 that had a 489 Sure grip.

If anyone has a 1971 chart, I would love to see it also!

71 340, D32, H51, SPD 601, axle code 017, 3.23 SG, 10" brakes, 489 case, 7290 u-joint

eliminating the A-body axle assemblies

1970 E-Body:
the "048" is a 741 w/2.76 ratio OPEN & 10" brakes
the "100" is a 741 w/3.23 ratio OPEN & 10" brakes
the "341" is a 741 w/3.23 ratio OPEN & 11" brakes

the "049" is a 489 w/3.23 ratio OPEN & 10" brakes
the "073" is a 489 w/3.23 ratio OPEN & 11" brakes

there are a number (for use in "axle packages") that do not have an "*" for sure-grip

anyone know what the "S" & "L" represent by the pinion diameter?

S = Small 1 3/8 = 741
L = Large 1 7/8 = 489

Another way to tell 489 is the spacer column. 489 all had collapsible spacer, not shim.

My 71 340 Cuda Convertible

BS27H1B344342

Automatic

I am 2nd titled owner. Original owner still with us.

741 Case, 3.23 Non-Sure Grip, 7260 U-joints



Bill Rolik

The S and L I would think it stands for stem diameter of the gears, Small or Large and refer to 1 3/4 for small and 1 7/8 large.


6bblgt is that chart for 1971 E Bodies. Looking at one 71 E Body BCS, here are some numbers under fourth line under axle 101, Line three under D axle 51.