Torque Box inclosed

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

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73HEMIRR
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Torque Box inclosed

Post by 73HEMIRR » Wed Oct 20, 2010 4:43 pm

I have a 73 Road Runner GTX that I bought (34) years ago. I'm the 2nd owner. When I restored this car (28) years ago I noticed that the floor pan has inclosed torque boxes. I thought that Chrysler only inclosed the torque boxes on the Hemi Cars and Convertibles. Has anyone seen this before? If not I wonder if Chrysler used a left over 71 floor pan.
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Re: Torque Box inclosed

Post by 1972RM23 » Wed Oct 20, 2010 8:55 pm

Torque boxes on all 440 4bb 440 6 bbl and 426 manual trans cars ... auto cars?
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Re: Torque Box inclosed

Post by 72RoadRunnerGTX » Wed Oct 20, 2010 10:16 pm

Transmission? didn't matter. For 71-72' b-bodies all 426 & 440 engine options received factory torque boxes, including a box plate near the rear spring shackle pivot, I would have to assume all 73-74' "U" coded cars got them as well.
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73HEMIRR
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Re: Torque Box inclosed

Post by 73HEMIRR » Thu Oct 21, 2010 12:43 pm

Thx for the info. I had not seen them on other 73 Road Runners.
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Re: Torque Box inclosed

Post by 71440 gtx » Fri Oct 22, 2010 3:14 am

72RoadRunnerGTX wrote:Transmission? didn't matter. For 71-72' b-bodies all 426 & 440 engine options received factory torque boxes, including a box plate near the rear spring shackle pivot, I would have assume all 73-74' "U" coded cars got them as well.
yes the 73-74 road runner gtx got them


so did 71 -74 dodge u coded cars :D :beer:
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Re: Torque Box inclosed

Post by 71X-mark » Mon Oct 25, 2010 12:28 pm

72RoadRunnerGTX wrote:Transmission? didn't matter. For 71-72' b-bodies all 426 & 440 engine options received factory torque boxes, including a box plate near the rear spring shackle pivot, I would have to assume all 73-74' "U" coded cars got them as well.
I've had two '71GTX's, one automatic and one 4-speed. Only the 4-speed had the box plates near the rear spring mount.

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72RoadRunnerGTX
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Re: Torque Box inclosed

Post by 72RoadRunnerGTX » Wed Oct 27, 2010 12:06 am

Strange, my 72' "U" code car was originally an automatic and it has box plates.
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Re: Torque Box inclosed

Post by quapman » Wed Oct 27, 2010 6:27 am

71X-mark.....

Were both your cars built at the same plant?

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Re: Torque Box inclosed

Post by 71X-mark » Thu Oct 28, 2010 1:32 pm

quapman wrote:71X-mark.....

Were both your cars built at the same plant?
Yes, both St. Louis built cars. The automatic was built in August and the 4-speed in November, 1970.

Also, I know of another '71 GTX automatic that does not have them. Don't know where his was built.

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