| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | It should be a 420, common, easy to work on, perhaps shift fork out of groove, or bent, or shift rail housing in top cover clogged(rare). Pull top cover and look around. Parts from Novak in SLC. Px on Youtube.
Look at post below yours from suburbanlou.
Ed
Last edited by EdPruss; 04/21/2017 5:55 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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