Late 2A frame change numbers

Has anybody ever come up with a number range for the change from the gusseted front bumpers to the riveted front bumpers? I've got a '48, serial number 2188xx, body number 212705, engine number J246346. It has the late style frame. Obviously, the bumper is not original.                                          

Edited by Hamhog - 28 May 2018 at 8:13am

Hey Hamhog, My father bought my jeep when it was 1 yr. old, no frame change and I have the newer frame on serial no. 208783 motor no. 238065. Which is not the same as the list from russnj link which shows newer style after no.215648....something don't jive. Joe W

I believe the frame change was after 214,XXX.... Mine is 224,xxx.... I find your engine s/n interesting!, if it's correct it changes the theory of 10,000 past chassis number.... The late 2A has several distinct differences from the earlier style, look at the inside of your passenger side Fender, there will be a factory dimple there so it clears the battery tray....

Lee

FWIW, my '48 is serial 217528, motor is J277264. That seems a stretch to be the original motor. I've assumed it was a swap from a '49. 

This is a pic from last year, showing the newer style frame, serial no.208783 One pcs formed 10ga(early style has 12ga channel with reinforcement straps spot welded on), shorter trans crossmember doesn't extend past the frame, diff MC, bellcrank, bumper mounts and horn button. I'll post the original title if you want to see it, like I said been in family possession since 1yr old......no frame change I know of Joe W    the channel bumper just unbolts.

Edited by wadoyado - 28 May 2018 at 5:17pm