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re 1934 4speed gear box
#1504385 06/09/2023 8:25 AM
Joined: Apr 2013
Posts: 18
australia
P
psmith1954
Offline
'Bolter
psmith1954
'Bolter
P Offline
Joined: Apr 2013
Posts: 18
australia
Hi does any one know if the 1934 4 speed crash gearbox can be upgraded and made into synchromesh gearbox if not in all gears at least 2nd 3rd and 4th gear

1934 1-1/2 ton truck (Australia)
Re: re 1934 4speed gear box
psmith1954 #1504587 06/10/2023 1:07 PM
Joined: Jun 2011
Posts: 5,096
Longmont, CO
E
EdPruss Offline
Crusing in the Passing Lane
EdPruss
Crusing in the Passing Lane
E Offline
Joined: Jun 2011
Posts: 5,096
Longmont, CO
Easy to learn to shift properly. No way to change. SM-420 (‘47-‘68) is first synchro 4 speed.

Ed

'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.

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