8 3/4

Technical Question and Answer - On topic to 71-74 Plymouth B-bodies only.

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aerodynamic
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8 3/4

Post by aerodynamic » Mon Feb 18, 2008 9:46 pm

Hey guys.

Where on a car was the differential option noted? I think mine came with 3:55s but I'm not sure. And where was it listed whether or not it was a SureGrip?
73 Road Runner 400 auto

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Re: 8 3/4

Post by 71440 gtx » Tue Feb 19, 2008 4:31 am

aerodynamic wrote:Hey guys.

Where on a car was the differential option noted? I think mine came with 3:55s but I'm not sure. And where was it listed whether or not it was a SureGrip?

on fenner tag :beer:
71 gtx 440 4speed air grabber blue on blue with white vinyl roofOption cassette player


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Post by aerodynamic » Tue Feb 19, 2008 7:14 am

That's what I thought too, but when I decoded it I got this:

E68 400-4 Barrel High Preformance
D34 TorqueFlite Automatic Transmission
RM21 R = Plymouth Road Runner
M = Medium
21 = 2 Door Coupe
P3G P = 400 260HP(net) 1-4BBL 8 CYL
3 = 1973
G = St. Louis, MO, USA
117839 Sequence Number '117839'
TX9 Paint Code: Black / Black Velvet
C2L3 Trim Grade/Style/Color
C = Charger
2 = Vinyl Bench
L3 = Parchment
HL4 Upper Door Frame: Unknown At This Time
919 Date Built: 9 / 19 / 1972
097272 Order Number: 097272
V1X Roof Type OR Color: Full Vinyl Top - Black
U Built to Specifications for USA Order
A88 Interior Decour Group
B41 Front Disc Brakes Some Yrs. Power
G11 Tinted Glass All
G37 Left Hand Remote, Right Hand Manual Chrome Mirrors
H51 Single Air /w Heater
L31 Hood / Fender Mount Turn Signal
M21 Roof Drip Rail Moldings
M25 Wide Sill Molding
M26 Wheel Lip Molding
N41 Duel Exhaust w/o Tips
N42 Chrome Duel Exhaust Tips
R35 AM / FM Multiplex Sterio
28 Unknown At This Time
END End of Codes
73 Road Runner 400 auto

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Post by 71440 gtx » Tue Feb 19, 2008 3:59 pm

look on 8.34 for tag 3.23 3.55. 391
71 gtx 440 4speed air grabber blue on blue with white vinyl roofOption cassette player


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Post by Eric » Tue Feb 19, 2008 6:55 pm

Do you have a broadcast sheet?
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Post by RS23-71 » Tue Feb 19, 2008 7:17 pm

You trying to figure out what it came with? or what is in it right now?
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Post by Smellslike1974 » Tue Feb 19, 2008 7:55 pm

I guess it depends what year because mine doesn't say in tag either. :?
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Post by Eric » Tue Feb 19, 2008 8:16 pm

Most aren't coded on the tag....only if it came with an axle package (like a super trak pak).
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Post by Smellslike1974 » Tue Feb 19, 2008 8:27 pm

cant you just jack the back up and have a buddy with you and spin the wheels?
My dad says you could do that,but ive told him with a limited slip you wouldnt be able to tell.isnt the sure grip a ls?
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Post by RS23-71 » Tue Feb 19, 2008 9:13 pm

RS23 '71 wrote:You trying to figure out what it came with? or what is in it right now?
Thats why I asked that question... cause to figure out whats in it now is to do what you mention. Put a jack under the diff. and raise both tires off the ground. Put a chalk mark on the driveshaft and tire then it just takes some counting. :)
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Post by aerodynamic » Wed Feb 20, 2008 12:24 am

To answer one of the questions above, the reason I'm asking is because at the moment the car seems to have a non-SureGrip, 3.21 gear. That's what it had in it when I bought it. I know the car was raced, and it still goes like a scaulded dog...it's got the high stall converter. I was told they probably put I higher gear in it because of the converter, though I'm not sure why it's not SureGrip. Anyway, I thought the HP-motor equipped cars like mine usually came with 3:55s. Am I wrong? I don't have a build sheet. So I guess I'm just mainly curious about this car's history since I don't know much about it.
73 Road Runner 400 auto

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