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Transmissions and Rear Ends Three on the tree or four in the floor? Shift it all here.

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  #1  
Old January 14th, 2023, 09:05 PM
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Default Swapping 4:10 Dana 60 gears to 3:54's

Where do I get 3:54's that fit one for one with my 1966 1500 series stock Dana 60 axles and housing? If one of you has them, thats good - tell me how much and lets get them on the way to Alabama. Don't want to swap the whole rear end really because that seems stupid. If ordering from Yukon gear is the best way, then fine - I was told 67-72's had 3:54's and would fit my housing and axles so someone on here outta know
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  #2  
Old January 15th, 2023, 03:21 PM
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Default Re: Swapping 4:10 Dana 60 gears to 3:54's

https://www.rigidaxle.com/

https://www.rigidaxle.com/products/d...43266885845214

$356.00
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  #3  
Old January 17th, 2023, 06:06 AM
James James is offline
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Default Re: Swapping 4:10 Dana 60 gears to 3:54's

You may also need a new yoke. If your old yoke is a 10 splines. The new one should be a 29 splines to match the new pinion.
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Old January 19th, 2023, 04:19 PM
gmccollector gmccollector is offline
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Default Re: Swapping 4:10 Dana 60 gears to 3:54's

Im not finding factory 3:54s, at least in a 1969 GMC Data book . They do show a 3;73 as an RPO in a 2500 series D60 . I think your only option is to buy the gear new for that truck
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Old January 21st, 2023, 06:23 PM
gmcjuniorvan gmcjuniorvan is offline
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Default Re: Swapping 4:10 Dana 60 gears to 3:54's

I found this.
P/N 2448081 is for the GMC Dana 60-35 Ratio 3.54 1962-65. My book only goes to 65. The number was replace with 3940104 gear Assy. (Dana 24813x) and 3940103 Yoke (Dana 24813x) If your case number is 30357 (4.10 and down) it will fit.

Dana application chart 24813x
https://danaproparts.com/i-30497936-...wsm-prod-tab-1

Dana 24813-5x includes the bolts and pinion nut.

Summit
https://www.summitracing.com/parts/sdh-24813x



NOS 3940104
https://www.oldsobsolete.com/product...et-gm-3940104/

Last edited by gmcjuniorvan; January 21st, 2023 at 07:48 PM.
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  #6  
Old January 22nd, 2023, 07:32 AM
BobBray BobBray is offline
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Default Re: Swapping 4:10 Dana 60 gears to 3:54's

3.54 ratio Dana 60's were optional in '68 1500's and 2500's with the 351E V-6 and 396 V-8, but no other engines.
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Old January 23rd, 2023, 07:36 PM
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Smile Re: Swapping 4:10 Dana 60 gears to 3:54's

Quote:
Originally Posted by gmcjuniorvan View Post
I found this.
P/N 2448081 is for the GMC Dana 60-35 Ratio 3.54 1962-65. My book only goes to 65. The number was replace with 3940104 gear Assy. (Dana 24813x) and 3940103 Yoke (Dana 24813x) If your case number is 30357 (4.10 and down) it will fit.

Dana application chart 24813x
https://danaproparts.com/i-30497936-...wsm-prod-tab-1

Dana 24813-5x includes the bolts and pinion nut.

Summit
https://www.summitracing.com/parts/sdh-24813x



NOS 3940104
https://www.oldsobsolete.com/product...et-gm-3940104/
Thank you Sir! I will be picking up one of these choices very soon
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My 60-66 GMC Projects:

1960 1001 Custom Cab short wideside BBW, 305A V6, factory PB, Hood Jet, Radio and Hydramatic.

1962 K1000 4x4 short wideside, BBW, 305D w/ SM420, PTO Winch

1966 1001 Custom Cab short wideside, w/ super rare Sport Trim option interior (bucket seats)
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Old January 23rd, 2023, 07:38 PM
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Default Re: Swapping 4:10 Dana 60 gears to 3:54's

Quote:
Originally Posted by James View Post
You may also need a new yoke. If your old yoke is a 10 splines. The new one should be a 29 splines to match the new pinion.
guessing that is going to come off a 3:54 geared parts truck only and thus probably just need to be buying the gears too then, otherwise I will end up with gears and no way to make them attach to my driveshaft. **** what a pain
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My 60-66 GMC Projects:

1960 1001 Custom Cab short wideside BBW, 305A V6, factory PB, Hood Jet, Radio and Hydramatic.

1962 K1000 4x4 short wideside, BBW, 305D w/ SM420, PTO Winch

1966 1001 Custom Cab short wideside, w/ super rare Sport Trim option interior (bucket seats)
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  #9  
Old January 23rd, 2023, 07:50 PM
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Default Re: Swapping 4:10 Dana 60 gears to 3:54's

[QUOTE=gmcjuniorvan;76584]If your case number is 30357 (4.10 and down) it will fit.

Where is this case number stamped on the housing just so I can check and be certain before jumping here
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My 60-66 GMC Projects:

1960 1001 Custom Cab short wideside BBW, 305A V6, factory PB, Hood Jet, Radio and Hydramatic.

1962 K1000 4x4 short wideside, BBW, 305D w/ SM420, PTO Winch

1966 1001 Custom Cab short wideside, w/ super rare Sport Trim option interior (bucket seats)
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  #10  
Old January 24th, 2023, 12:10 AM
gmcjuniorvan gmcjuniorvan is offline
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Default Re: Swapping 4:10 Dana 60 gears to 3:54's

I see you have 4:10now if it is not a power lock it should be case 30357. Like I said my book only goes to 65. It’s a casting number on the “back” of the case. The yoke is a Dana 3-4-5731-1X. Had the wrong number in my post.

EBay Yoke Offer 20
https://www.ebay.com/itm/12573125277...3ABFBM2O-Lkbxh
Attached Images
File Type: jpg GMC Master Parts Book X-164001 September 1963.jpg (120.5 KB, Multiple views, 8 clicks)
File Type: jpg Jeep Dana 60 Differential Carrier.jpg (45.5 KB, Multiple views, 2 clicks)

Last edited by gmcjuniorvan; January 24th, 2023 at 01:07 AM.
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