| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Watson boxes were labeled such, bought or taken over by Brown-Lipe, Spicer. Not as strong as later boxes labeled 5031, 6041, etc., the 5, 6 stands for Engine torque rating in hundreds, Fine for a gasser, not diesels.
The left shift rail, rear position should be OD. Move the shift rails and count the revolutions. With the shift lever installed, OD would be right and fwd.
Ed
Last edited by EdPruss; 05/28/2019 6:47 PM.
'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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