I have seen several e-bodies recently with 11" rear drums on cars with power disc brakes. Under what conditions did this happen? Also, in '69 & '70 the "normal" rear springs for cars with performance axle packages were HEMI springs, at some point in '71 it appears most 383 & 340 cars with A31 (3.91s) & A36 (3.55s) recieved the STANDARD rear springs. Anybody know why?

'71 ebodies with power disc brakes B41 & B51 (10" vs. 11" rear drums):
BS/JS w/DRUM BRAKES were 11" all around

BS23 - 383 4bbl auto A/C 2.76 open - F70-14 w/B41 & B51
(disc,??") AXLE - 101 small U joint T-BARS - 779/778 RR SPRINGS - 044/044

BS23 - HEMI 4-spd 4.10 S/G - F60-15 w/B41 & B51
(disc,??") AXLE - 026 T-BARS - 781/780 RR SPRINGS - 034/024

BS23 – 440+6 auto 4.10 S/G – E60-15 w/B41 & B51
(disc,??") AXLE – 026 T-BARS – 781/780 RR SPRINGS – 034/024

BS23 – 440+6 auto 4.10 S/G – F70-14 w/B41 & B51
(disc,??") AXLE – 026 T-BARS – 781/780 RR SPRINGS – 034/024

BS23 - HEMI 4-spd 3.54 S/G - F60-15 **** MANUAL DRUM BRAKES ****
(11",11")AXLE - 025 T-BARS - 781/780 RR SPRINGS - 034/024

BS23 - 440+6 4-spd 3.54 S/G - E60-15 **** MANUAL DRUM BRAKES ****
(11",11") AXLE - 025 T-BARS - 781/780 RR SPRINGS - 034/024

BS23 - 440+6 4-spd 3.54 S/G - E60-15 w/B41 & B51
(disc,11") AXLE - 025 T-BARS - 781/780 RR SPRINGS - 034/024 (025 AXLE has 11" rear drums)

BS23 - HEMI 4-spd 3.54 S/G - F60-15 w/B41 & B51
(disc,10") AXLE - 024 T-BARS - 781/780 RR SPRINGS - 034/024

BS27 - 440+6 4-spd 3.54 S/G - F70-14 w/B41 & B51
(disc,10") AXLE - 024 T-BARS - 781/780 RR SPRINGS - 034/024

BS27 - 340 auto 3.91 S/G - F70-14 **** POWER DRUM BRAKES ****
(11",11") AXLE - 023 T-BARS - 779/778 RR SPRINGS - 045/045

BP23 - 383 4bbl auto 3.91 S/G - F70-14 **** MANUAL DRUM BRAKES ****
(11",11") AXLE - 023 T-BARS - 779/778 RR SPRINGS - 044/044

BS23 - 340 auto 3.91 S/G - E60-15 w/B41 & B51
(disc,10") AXLE - 022 T-BARS - 781/780 RR SPRINGS - 034/024

BS27 - HEMI auto 3.55 S/G - F60-15 **** MANUAL DRUM BRAKES ****
(11",11") AXLE - 021 T-BARS - 781/780 RR SPRINGS - 034/024

BS23 - 383 4bbl auto 3.55 S/G - ???-?? w/B41 & B51
(disc,11") AXLE - 021 T-BARS - 779/778 RR SPRINGS - 044/044 (JIM V's 021 has 11" rear drums) tires - ??

BS23 – 340 auto 3.55 S/G – F70-14 **** MANUAL DRUM BRAKES ****
(11",11") AXLE – 021 T-BARS – 779/778 RR SPRINGS – 044/044

BS23 - 340 4-spd 3.55 S/G - F70-14 **** MANUAL DRUM BRAKES ****
(11",11") AXLE - 021 T-BARS - 779/778 RR SPRINGS - 044/044

BS27 - 340 auto A/C 3.55 S/G - F70-14 w/B41 & B51
(disc,10") AXLE - 020 T-BARS - 779/778 RR SPRINGS - 045/045

BS23 – 340 4-spd 3.23 S/G – F78-14 **** MANUAL DRUM BRAKES ****
(11",11") AXLE – 019 T-BARS – 779/778 RR SPRINGS – 044/044

JH27 - 383 4bbl auto A/C 3.23 S/G - F70-14 w/B41 & B51
(disc,11") AXLE - 017 T-BARS - 779/778 RR SPRINGS - 045/045 (017 AXLE has 11" rear drums)

BS23 – 340 4-spd 3.23 S/G – E60-15 w/B41 B51
(disc,11") AXLE – 017 T-BARS – 779/778 RR SPRINGS – 044/044 (017 AXLE has 11" rear drums)

BS23 - HEMI auto 3.23 open - F60-15 w/B41 & B51
(disc,10") AXLE - 016 T-BARS - 781/780 RR SPRINGS - 034/024

BS23 - 383 4bbl auto A/C 3.23 open - F70-14 w/B41 & B51
(disc,10") AXLE - 016 T-BARS - 779/778 RR SPRINGS - 044/044

BS23 - 383 4bbl auto 3.23 open - F70-14 w/B41 & B51
(disc,10") AXLE - 016 T-BARS - 779/778 RR SPRINGS - 044/044

BS27 - 340 auto 3.23 open - F70-14 **** MANUAL DRUM BRAKES ****
(11",11") AXLE - 015 small U joint T-BARS - 779/778 RR SPRINGS - 045/045

JH23 - 340 3-spd 3.23 open - E60-15 **** MANUAL DRUM BRAKES ****
(11",11") AXLE - 015 small U joint T-BARS - 779/778 RR SPRINGS - 044/044

BS23 – 340 auto 3.23 S/G – F70-14 w/B41 B51
(disc,10") AXLE – 014 small U joint T-BARS – 779/778 RR SPRINGS – 044/044

Dan,

I don't know if any sense will EVER be made out of this deal.

FYI: The Juliano BS27V1B is a column shift automatic, front disc brakes, with an 026 axle (4.10 Dana) per the broadcast sheet, but has always had the 11" rear brakes. The entire history from new is known.

One of the other cars I referenced is BS23V1B370411. Manual trans and built for Canada. 11" rear brakes from new.

Bill Rolik

my BS23V1 05/26/71 build date 3.55 8.75 727auto front disc/11" rear drums has the 024/034 springs - Joe

Good to see this got its own thread.

Tav

Has anybody seen a '71 4.10 e-body with 10" rear drums, or a b'cast with other than 026 for the rear axle?

no sheet, where would I look for the 021 - have pics of my brake drums, but they're too big , don't know how to resize them - Joe

I don't know if the 021 would be found anywhere, I think your 11" rear drum 8-3/4 w/3.55s would be the same AXLE as Jim V's "hemi71x" original 383 car.

Here are pics of "shakerjoe's" 11" rear drums, complete with remnants of the original red paint.

Does this help?
All 71 'Cudas


BS23V1 – 440+6 auto 4.10 S/G – F70-14
SPD 216 - B41 B51 - P-SHAFT 775 - manual steering
AXLE – 026 T-BARS – 781/780 RR SPRINGS – 034/024

BS23V1 – 440+6 auto 4.10 S/G – E60-15
SPD 518 - B41 B51 - P-SHAFT 775 - manual steering
AXLE – 026 T-BARS – 781/780 RR SPRINGS – 034/024

BS23H1 – 340 4-spd 3.23 S/G – E60-15
SPD B09 - B41 B51 - P-SHAFT 636 - power steering
AXLE – 017 T-BARS – 779/778 RR SPRINGS – 044/044

BS23H1 – 340 auto 3.55 S/G – F70-14
SPD 311 - B11 - P-SHAFT 636 - manual steering
AXLE – 021 T-BARS – 779/778 RR SPRINGS – 044/044

BS23H1 – 340 4-spd 3.55 S/G – F70-14
SPD 105 - B11 - P-SHAFT 636 - power steering
AXLE – 021 T-BARS – 779/778 RR SPRINGS – 044/044

BS23H1 – 340 auto 3.23 S/G – F70-14
SPD A16 - B41 B51 - P-SHAFT 134 - power steering
AXLE – 014 T-BARS – 779/778 RR SPRINGS – 044/044

BS23H1 – 340 4-spd 3.23 S/G – F78-14 (T34)
SPD 520 - B11 - P-SHAFT 636 - quick ratio power steering
AXLE – 019 T-BARS – 779/778 RR SPRINGS – 044/044

Tav

thanks Dan

Read the images at this link, there are at least two pages that mention the 11' drums for the E-Bodies, but it would be better to read the whole thing instead of just grabbing those pages out of context, so.....

http://www.hamtramck-historical.com/vintageAdvertising/1971PlymouthPressRelease-02.shtml

Barry
The only time the 11" rear drums are mentioned is when front drums are involved.

There is mention of all Cuda's being equipped with HD suspension and 11" brakes. Could they be referring to drum brakes all around?

From the 71 Plymouth Salesman's Guide

It could be, I can not find anything else on it.


Yet......

Here is listing from the 70-71 Factory Part Book for the rear drums.
70 Finned
71 Not Finned

71 11" rear drums (both Motor Wheel and Kelsey Hayes) are fin type.

Bill Rolik

Odd that they make mention of it for 70 and not 71, especially with two different part numbers. Maybe the part numbers reflected the two different manufacturers?

Possible that by '71 finned was "assumed" also?

It seems like they tended to drop abjectives now & then once items were no longer "new".