oldtin&things Posted October 13, 2014 Report Posted October 13, 2014 Here in England we have a very original '47 Dodge wc truck. It came over from Ca last year. I have a problem with the rear end, I need to replace the pinion and ring gear, so we need to identify the differential to get the correct parts. These are the numbers I have found Ring gear. 'ormate' 41.1 1192364 346-R5 11 Pinion 2-4-47 41.1 1192365 MS 419 UI Differential 1092043 (one side) 1092045(other side) Can any of you guys identify this diff so I can get the correct ring gear and pinion. It also may help that the rear axle looks original and has 11" drum brakes. The front drums are 10", is this normal? Hope you can help an old English man get his truck on the road, I have only driven it in and out of the workshop!! Thank you, Ted Quote
jeffsunzeri Posted October 14, 2014 Report Posted October 14, 2014 Sounds like you have the standard 1/2 ton rear end. As long as you keep the ring/pinion as a pair and don't try to mix and match rings and pinions, you should be fine to replace them with just about any assembly from another 1/2 ton or Dodge-Plymouth automobile of the same vintage. Check your factory manual for details about the formate vs new process gears. Quote
oldtin&things Posted October 14, 2014 Author Report Posted October 14, 2014 Thank you for that info. I wanted confirmation that I have the correct rear end in the truck because..... Vintage auto parts inc sent me a replacement ring gear and pinion set, but when I came to install it, I noticed that the ring gear was thicker than the original, therefore would not adjust correctly. It is thicker by 1/8 of an inch. They have been very helpful but insist they have sent the right parts. So that is my problem, can you help me further? Thanks, Ted Quote
jeffsunzeri Posted October 14, 2014 Report Posted October 14, 2014 Are the ring and pinion tooth counts the same? There are 2 types of gear sets available, and they cannot be mixed. The numbers on your original set seem to indicate a "formate" set, as opposed to the "new process" set. Quote
Plymouthy Adams Posted October 14, 2014 Report Posted October 14, 2014 there are type A and type B gear set...the suffix denotes the proper application.. Quote
Don Coatney Posted October 14, 2014 Report Posted October 14, 2014 If you are going to the trouble of replacing the gear set why not install a better ratio. Quote
oldtin&things Posted October 15, 2014 Author Report Posted October 15, 2014 Thanks guys, Having checked again, formate is stamped on the old ring gear, 8 1/4" dia. The replacement set is identical to the old set apart from the gear thickness so when it is installed and I make the sideways adjustment it locks up. All the bearing sizes are identical. On the old ring gear after the numbers there is a capital A stamped within a circle. The old ratio was 41-1, I ordered 39-1, as I had a choice. The guys at vap.inc (suppliers) say both the 41-1 and 39-1 are the same thickness. Could the heavy duty set be for a military WC. Have you any ideas where I can go from here??? PLEASE!! Thank you all for your time and knowledge, Regards, Ted Quote
Plymouthy Adams Posted October 15, 2014 Report Posted October 15, 2014 as posted above..there are two set of gears per my interchange book..A and B this was posted not long back... http://p15-d24.com/topic/36105-crown-pinion/?hl=%2Bcrown+%2Band+%2Bpinion Quote
jeffsunzeri Posted October 15, 2014 Report Posted October 15, 2014 All the military WC's were 4x4 and used the full floating rear end. Not sure about the thickness disparity... Quote
DJ194950 Posted October 15, 2014 Report Posted October 15, 2014 Check with: vintagepowerwagons.com. In their online parts book however says the last wc 1/2 ton was 1945. No experience with these myself, but they have some Large ring and pinions for these and some they describe as the Small 8 1/4 ring and pinions for those years? Call them I have head they are very helpful. DJ Quote
jeffsunzeri Posted October 15, 2014 Report Posted October 15, 2014 Check with: vintagepowerwagons.com. In their online parts book however says the last wc 1/2 ton was 1945. No experience with these myself, but they have some Large ring and pinions for these and some they describe as the Small 8 1/4 ring and pinions for those years? Call them I have head they are very helpful. DJ Don't confuse the military WC series with the civilian series. The civilian wc 1/2 ton pickups ran through 1947 and were all 2-wheel drive with a rear end identical to the automobiles. The military WC-1 (predecessor to the Power Wagon) began in 1941 and ran through 1945 and although it was rated as 1/2 ton, it was 4WD with the full floating rear axle. Quote
DJ194950 Posted October 15, 2014 Report Posted October 15, 2014 Like I said no experience with these, however vintagepowerwagons does, therefore my thought for them to be contacted. If the model wc he has is the same rear end as the cars there is a fair chance that the rear end was swapped out somewhere in it's life. My interchange book can get Very complicated when it comes to Dodge truck rear gears. DJ 1 Quote
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