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Old 10-05-2017, 03:30 PM   #1
Cannont
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will this '67 rear end gear swap to my '50?

Was at the pick-a-part and came across a '67 C20 with a 10bolt. Quick glance it appeared to be 4.10, could be the 4.5 but I'm doubting it. Would this pumpkin swap into my '50 3800 9bolt? Click hyperlinks to see pics if my photo attachments didn't work.



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Old 10-05-2017, 10:11 PM   #2
fourspeedwagon
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Re: will this '67 rear end gear swap to my '50?

Looks like an Eaton rear, ho52? My understanding is that is the one to get the chunk out of. I got one not long ago from a 67/72 that was being scrapped. 4.11 should be much better than the 5.13s and then—— be sure to sell the 5.13s to a 4x4 guy as they want to go the opposite of us.
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Old 10-05-2017, 11:58 PM   #3
Cannont
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Re: will this '67 rear end gear swap to my '50?

I wonder would my ho72 hub on my '50 fit this eaton axle. Don't know if they are interchangeable like that?
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Old 10-06-2017, 12:22 AM   #4
mongocanfly
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Re: will this '67 rear end gear swap to my '50?

better pull a tape measure on that 67 c20 donor axle...its probably gonna be to wide wms to wms for a 50
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Old 10-06-2017, 12:48 AM   #5
mongocanfly
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Re: will this '67 rear end gear swap to my '50?

well they may be closer in width than I thought....i found where they say the c20 is 62"wms to wms and the 3800 is 60"(another stated 61 3/4")....here's some more good info..
https://www.stovebolt.com/techtips/a...Ton%20Upgrade/

Last edited by mongocanfly; 10-06-2017 at 12:57 AM.
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Old 10-08-2017, 10:25 AM   #6
Matt_50
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Re: will this '67 rear end gear swap to my '50?

I'm not sure about 3800s but on my 3100 the rear end was 62 inches. Wheels off, drums on.

I have a c10 10 bolt that measures 64 inches. If you use c10 stock wheels and tires the tirea will probably stick out a tad, they will on mine if I do. Either get offset wheels or smaller rims. I talked to a guy on the HAMB who use a c10 rear and bought 16x5 rims. All tires were inside fenders
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Old 10-08-2017, 01:03 PM   #7
mr48chev
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Re: will this '67 rear end gear swap to my '50?

Gents he just wants to swap the pumpkin as fourspeewagon answered to. You have to have the correct Eaton donor and that was his question, is that the correct Eaton donor.

I'm not sure I would want to be wrestling with it under that truck the way they have the stands under the control arms in the photo though. That looks like a bad accident waiting to happen. The stands are safe on soft ground but the they way they put them under the truck is a bit shaky.

Make sure that there isn't a bunch of slack in the ring and pinion though. A lot of old trucks have pretty well worn out rear ends under them. You don't want to get it out and then find that it is worn out. I'd pull the rear cover and make sure what gear ratio it had before even thinking about doing anything else though. Wrong ratio or looks bad inside, bolt the cover back and hunt some more.
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Last edited by mr48chev; 10-08-2017 at 01:09 PM.
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Old 10-08-2017, 02:20 PM   #8
mongocanfly
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Re: will this '67 rear end gear swap to my '50?

yep...I guess it helps if you actually read the question....
dang mailorder speed reading courses....I need to get my $1.99 back
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Old 10-08-2017, 02:23 PM   #9
Matt_50
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Red face Re: will this '67 rear end gear swap to my '50?

Yea...
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