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#75390 03/25/2007 1:08 AM | Joined: Dec 2000 Posts: 5 Junior Member | | Junior Member Joined: Dec 2000 Posts: 5 | Can anyone help me identy what year and model of truck this transmission came from?
It is a 4 speed with the shifter entering at the top. Is has no cross member mounting bracket. Does not really have a tail case and uses a U-joint yoke on the output shaft. Gear shift pattern is the stardard "H" with reverse toward the driver and back to the rear.
Top cover has the numbers GM 3, 591588.
Numbers on the side of the case are:
B2381, 14 GM T, 3787239
It is short but looks pretty heavy duty.
Thanks | | |
#75391 03/25/2007 1:58 AM | Joined: Dec 2006 Posts: 1,464 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 1,464 | Sounds like the old Muncie/GM SM420 granny gear 4-speed that was used in the 40's and 50's. Got a picture? | | |
#75392 03/25/2007 3:20 AM | Joined: Dec 2006 Posts: 1,464 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 1,464 | Had another thought on this: do a Google search for SM420, you'll see lots of articles, pictures, date codes, etc. Found out the SM420 was used on Chev trucks from '47 thru '67. | | |
#75393 03/25/2007 3:23 AM | Joined: Dec 2000 Posts: 5 Junior Member | | Junior Member Joined: Dec 2000 Posts: 5 | Yep, just did that and that is exactly what it it.
Super, thanks! | | |
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