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| | | Joined: Feb 2015 Posts: 273 Shop Shark | | Shop Shark Joined: Feb 2015 Posts: 273 | Ok, so I finally found a 14 bolt cab and chassis rear axle for my 1953 3800 dually. Figured this gets me away from the HO72's 5.14 gears and those brakes and possible discs down the road but not likely. It is roughly 40.5" from spring perch center to spring perch center and it has the inner duals wheels still on it, but looks to be the correct 63" WMS to WMS. It also has the long dually hubs, not the short SRW hubs so the housing looks to be the one I want. Here's the catch...It was listed as a 4.10, but I popped the cover and the ring has 12 45 stamped on it. Hmmm, oddball 3.75-1 ratio. Heard mention of a van ratio with odd gears like that but basically the same as a 3.73. The housing was out of a 74 model, but the ring gear is stamped 11 77 I think, so probably swapped out at some point. Will I be able to live with these gears?
Will be running stock 216/SM420 4 speed. 19.5 P30 dually wheels with 8R19.5 recaps. I have not measured how tall the drive tires are, but they ARE recaps so could be a little taller than standard.
What does the gang think, and would a 235 make a big difference with the 3.75's if I went that way later?
Thanks,
Larry W.
1953 3800 Dually Flatbed
| | | | | Joined: Dec 2006 Posts: 206 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 206 | With a 216 or a 235 you'll need a landing strip to get up to 60
I swapped a 14 bolt with 410's and a 292 and its just about right | | | | | Joined: Feb 2015 Posts: 273 Shop Shark | | Shop Shark Joined: Feb 2015 Posts: 273 | Looks like I'll be replacing the gears. I found them under $200 already, no biggie.
thoroco, how did the 292 (V6 right?) work out? Did you have to shift the steering box over like a V8? What did you have to change on the clutch end of things? I assume you went from a 216 or 235?
Larry W.
1953 3800 Dually Flatbed
| | | | | Joined: Feb 2015 Posts: 273 Shop Shark | | Shop Shark Joined: Feb 2015 Posts: 273 | Just realized that you might mean a 292 (GMC?) six?
1953 3800 Dually Flatbed
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Chevy's, confused with 230/250 etc., pushrod cover on side of block is about 6" high, best, quickest way to tell.
'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.
| | | | | Joined: Dec 2006 Posts: 206 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 206 | 292 straight 6. fit in nicely. | | |
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