The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - $ speed and Aux overdrive unit for my 1951 3800 pickup.

lmdangerous · 11-27-2011, 02:57 AM

I have located a 4 speed trans and Aux ( od , UD, D) 3 speed from a 40- 46 chevy COE truck. Can anyone tell me if this tranny is the SM 420 muncie trans or somthing else , My 420 is damn near bullet proof. The aux unit is a watson unit - early spicer, etc. This one bolts together no short drive shaft. Can any one confirm what the trans is for this year??? The Aux is no good to me if the primary trans is weak?? I would really like to make this work cause it would give me an overdrive without butchering my truck. Any one know ???
LMD

11-27-2011, 02:57 AM	#1
lmdangerous Registered User Join Date: Nov 2010 Location: Houston, MS Posts: 184	$ speed and Aux overdrive unit for my 1951 3800 pickup. I have located a 4 speed trans and Aux ( od , UD, D) 3 speed from a 40- 46 chevy COE truck. Can anyone tell me if this tranny is the SM 420 muncie trans or somthing else , My 420 is damn near bullet proof. The aux unit is a watson unit - early spicer, etc. This one bolts together no short drive shaft. Can any one confirm what the trans is for this year??? The Aux is no good to me if the primary trans is weak?? I would really like to make this work cause it would give me an overdrive without butchering my truck. Any one know ??? LMD Last edited by lmdangerous; 11-27-2011 at 03:05 AM. Reason: spelling