| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | I was able to find a 4.33 two speed diff. That fit right into my 1890 rear housing(1890's) are GM only so hard to find in books. Look up on old time repair shop, some of the old guys can figure it out.
A Brownie with a Tru-stop brake mounted would be a good alternative. A 6xxx series Brownie with a 10" or 12" brake would work fine for a hobby truck.
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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