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Pinion Bearing 56' Custom Royal Jump to page : 1 Now viewing page 1 [50 messages per page] | View previous thread :: View next thread |
Forward Look Technical Discussions -> Transmission and Rear Axle | Message format |
plachy |
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Member Posts: 12 Location: North Carolina | I have a 56’ Dodge Custom Royal Vin 35080619 4dr, 315 cu in, 2 bbl, 3 spd. How do I verify Differential manufacturer, gear ratio, and ring gear info? Most likely need Pinion Bearing but could be more. Thanks, Rodney | ||
56D500boy |
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Expert 5K+ Posts: 9900 Location: Lower Mainland BC | . The rear differential ratio is stamped onto the gear carrier just below the filling plug. For me with originally a Powerflite, it was "3.54". (see photo below) For a 3 spd manual I think the two most common rear diff ratios were 3.9, 4.1 and 4.3, probably depends on whether there was also overdrive at the end of the manual transmission. As for parts, there are many. When you get a better idea what the issue is and what you need/want to replace, we can find the OE part numbers for you, if you can't. There is still some New Old Stock parts out there in internetland. Edited by 56D500boy 2021-07-01 3:19 AM (55-58RearDiffGears.jpg) Attachments ---------------- 55-58RearDiffGears.jpg (157KB - 200 downloads) | ||
57chizler |
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Expert Posts: 3776 Location: NorCal | The rear end is Chrysler made, commonly referred to as the 8 1/4" rear end. Most internal parts date back to 1937. | ||
56D500boy |
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Expert 5K+ Posts: 9900 Location: Lower Mainland BC | . If it is the Pinion Bearing, the bearing is in a two part set: the 1401 808 cone and rollers and the 1401 810 cup. Timken made/makes the bearing set. The 1401 808 was a Timken HM-89443 and the 1401 810 was a Timken HM-89410. https://cad.timken.com/item/tapered-roller-bearings-ts-tapered-singl... Hiltop Mopar has a NOS set (ignore the 8 3/4" note): https://www.hiltopautoparts.com/product/nos-mopar-front-drive-pinion... Edited by 56D500boy 2021-07-01 3:46 PM (56DodgePinionBearingPNs_ConeAndRoller1401808_Cup1401810.jpg) (1401808And1401810ToTimkenPNs.jpg) Attachments ---------------- 56DodgePinionBearingPNs_ConeAndRoller1401808_Cup1401810.jpg (225KB - 180 downloads) 1401808And1401810ToTimkenPNs.jpg (159KB - 192 downloads) | ||
57chizler |
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Expert Posts: 3776 Location: NorCal | 56D500boy - 2021-07-01 12:09 PM Hiltop Mopar has a NOS set (ignore the 8 3/4" note): Some 8 3/4" use the same pinion bearings as the 8 1/4". | ||
56D500boy |
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Expert 5K+ Posts: 9900 Location: Lower Mainland BC | 57chizler - 2021-07-02 11:20 AM Some 8 3/4" use the same pinion bearings as the 8 1/4". That was my thought as well. | ||
plachy |
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Member Posts: 12 Location: North Carolina | Thank you! Helpful. -------------- It's a beautiful, friendly State from Mtns to Sea with great weather. Often listed as top areas to move, especially Coast during Covid. Some people move sight unseen! | ||
plachy |
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Member Posts: 12 Location: North Carolina | Thanks, I'm on it. Will reach back out as needed. | ||
plachy |
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Member Posts: 12 Location: North Carolina | My gear carrier is stamped 3.73T I've found a mechanic to work on this, not many. He suggests rebuilding and replacing at least the 4 bearings (Pinion and Differential) while it's torn apart. Would you agree? He doesn't want to tie up the rack too long. Thinking to pre- purchase these parts ahead of time, or a kit (if it exists). (differential.jpg) Attachments ---------------- differential.jpg (83KB - 192 downloads) | ||
Powerflite |
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Expert 5K+ Posts: 9664 Location: So. Cal | Decide first if you would like to change to a different gear ratio because there are none available new. You have to purchase a used one and install it. In general, it is a lot cheaper to just get another used one that works and install it. Just replace the pinion seal and most of the time, that's all it needs. | ||
56D500boy |
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Expert 5K+ Posts: 9900 Location: Lower Mainland BC | plachy - 2021-07-08 9:57 AM My gear carrier is stamped 3.73T I've found a mechanic to work on this, not many. He suggests rebuilding and replacing at least the 4 bearings (Pinion and Differential) while it's torn apart. Would you agree? He doesn't want to tie up the rack too long. Thinking to pre- purchase these parts ahead of time, or a kit (if it exists). There is no "kit" so you will have to source parts on your own. I'm a bit surprised that you don't have a 3.54 rear diff but 3.73 was certainly available for 56 Dodges, as a option. Maybe "recommended" (?) in "Hilly" (or was that "Flat"?) country (I vaguely remember seeing that somewhere). I didn't like the "earred" U-joint, so I swapped to a 58 style rear U-joint. There were a couple of issues: http://www.forwardlook.net/forums/forums/thread-view.asp?tid=69669&... At the same time, I also replaced the pinion seal with a modern type. Again, there were some issues: http://www.forwardlook.net/forums/forums/thread-view.asp?tid=71686&... Good luck. Edited by 56D500boy 2021-07-08 4:14 PM | ||
57chizler |
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Expert Posts: 3776 Location: NorCal | The difference in the gap of the yoke dust shield is cause for alarm. (differential.jpg) Attachments ---------------- differential.jpg (109KB - 190 downloads) | ||
56D500boy |
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Expert 5K+ Posts: 9900 Location: Lower Mainland BC | 57chizler - 2021-07-09 12:05 PM The difference in the gap of the yoke dust shield is cause for alarm. I thought that too but then I thought that it *MIGHT* just be an optical illusion. If it isn't then, yes, there is some kind of issue (bearing, etc) | ||
56D500boy |
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Expert 5K+ Posts: 9900 Location: Lower Mainland BC | plachy - 2021-07-08 9:57 AM I've found a mechanic to work on this, not many. He suggests rebuilding and replacing at least the 4 bearings (Pinion and Differential) while it's torn apart. In the diagram below, I have previously identified the front pinion bearing listed as being in section 3-22-24/25 (see above). This is PN 1401 808 which is Timken HM-89443. The rear pinion bearing is PN 1401 809 which is Timken HM-89446. https://cad.timken.com/item/tapered-roller-bearings-ts-tapered-singl... The other bearings are listed in as being in Section 3-11-1/2. These are listed in those sections as 693 404 and 403. These are Timken 25580 - 25520 as shown here: https://cad.timken.com/item/tapered-roller-bearings-ts-tapered-singl... Edited by 56D500boy 2021-07-10 2:28 AM (56DodgeDifferentialFrontAndRearPinionBearingPNsWithCrossToTimkenPNs.jpg) (56DodgeDifferentialBearingPNsInSection3_11_1&2_asPNs698404&403.jpg) (56DodgeDifferentialBearingsPNs698404&403AsTimken25580And25520.jpg) Attachments ---------------- 56DodgeDifferentialFrontAndRearPinionBearingPNsWithCrossToTimkenPNs.jpg (158KB - 199 downloads) 56DodgeDifferentialBearingPNsInSection3_11_1&2_asPNs698404&403.jpg (154KB - 197 downloads) 56DodgeDifferentialBearingsPNs698404&403AsTimken25580And25520.jpg (158KB - 191 downloads) | ||
plachy |
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Member Posts: 12 Location: North Carolina | I've decided to remove the forward mount differential. Assuming its the front bearing, which may also be causing the yoke dust shield gap. Want to replace rear bearing and inspect gears while doing all this. Having difficulty removing Hub. Key lock won't budge. BTW, I converted to disc brakes and have had the hub off before. Not sure what has changed. Any technique you suggest? | ||
plachy |
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Member Posts: 12 Location: North Carolina | It's the rear Pinion Bearing. Going to start costing out all 4 bearings, slinger, oil seal, etc. Flange is fine. Unfortunately, the Ring Gear & Pinion teeth damaged. I believe that PN is 1567900. Suggestions for source? | ||
Powerflite |
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Expert 5K+ Posts: 9664 Location: So. Cal | Just get another used third member with the gear ratio you want and replace the unit. Either that or replace the whole rear end with one from a '65-'67 B-body. | ||
bbdakota |
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Veteran Posts: 129 | I've got a whole rear end from a 56 royal with 3.54 gears I removed from my car. Located in Mobile Al. Free to someone who can use it. Ran smooth with no noise. Edited by bbdakota 2021-07-21 6:08 PM | ||
plachy |
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Member Posts: 12 Location: North Carolina | Finally found a 3.73 from 56' Royal. Generally looks fine except the flange is different. Mine has yoke/flange; the donor car has round plate-no yoke. I've found 2 parts diagram each using same 16-20-01, but clearly different parts. What I need most from the donor is the pinion shaft, is it interchangeable? https://photos.google.com/album/AF1QipPL3lkvvsv2xYgdHgo7iZmIqNk0fAJQ... Edited by plachy 2021-08-18 4:19 PM | ||
Powerflite |
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Expert 5K+ Posts: 9664 Location: So. Cal | Yes, you should be able to swap pinion yolks around to use your old one on there - as long as they are from Dodge or Plymouth. | ||
plachy |
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Member Posts: 12 Location: North Carolina | Good, was hoping so. Yes, from Dodge. | ||
plachy |
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Member Posts: 12 Location: North Carolina | The 3.73 was defective. Found a 3.54, replaced bearings, looking good. All together now, but want to lubricate rear axle bearing through the grease hole. Any suggestions for type of grease, mfr., source? Service manual suggests 'Short fiber wheel bearing grease-Medium'. Also, how do you know how much to add? | ||
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