55 Bird 12v Battery

[Steve in Denver]

Which size 12 volt battery will correctly fit the battery tray for the 55 bird?

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[seeswell]

I assume it has been converted from 6V to 12V.

 

[Steve in Denver]

Yes, new generator, new heater motor, new bulbs, not sure what to do about the horns.

 

[doug7740]

The 1955 6V battery is a group 2 N and the 1956 and 1957 is a group 29 NF. The group 29 NF battery for 1956/57 models is available from the following sources:

NAPA, OE Exact Replacement. 390CCA 29NF BCI
Interstate Battery, part number 29NF VHD
O’Reilly Auto Parts, part number SSB 29NF

Hope this helps.

doug7740
1955 Thunderbird Blue

 

[Steve in Denver]

Thanks, but any idea if the group 29 is the same size as the Group 2N?

 

[doug7740]

Thanks, but any idea if the group 29 is the same size as the Group 2N?

I believe the battery tray is the same size for 1955, 1956 and 1957. Group 2N is 6 volt and group 29 is 12 volt. It looks like group 2N is: 10" x 5 9/16" x 8 15/16", and group 29 is: 13" x 5 1/2" x 8 15/16".

doug7740
1955 Thunderbird Blue

 

[Steve in Denver]

Thanks, so the 29 is 3 inches longer than the 2N, otherwise about the same.