Differential help
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3rd Gear
Joined: Apr 2023
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Differential help
Greetings y’all,
I have a 79 f250 4WD with a 400 6.6 I am restoring. It is time to change the differential fluid but I want to ensure I know exactly which differentials I have. I have read some posts but I do not want to lean on my own understanding and would like y’all’s help. The front differential the tag reads: 3 54 d8ta aec 610040-2. Rear diff reads: 3 54 d8ta Ada 603900 12. From what I can gather, the front diff is a Dana 61? And the rear a Dana 60? Is this correct? Thank y’all for the help much appreciated!
I have a 79 f250 4WD with a 400 6.6 I am restoring. It is time to change the differential fluid but I want to ensure I know exactly which differentials I have. I have read some posts but I do not want to lean on my own understanding and would like y’all’s help. The front differential the tag reads: 3 54 d8ta aec 610040-2. Rear diff reads: 3 54 d8ta Ada 603900 12. From what I can gather, the front diff is a Dana 61? And the rear a Dana 60? Is this correct? Thank y’all for the help much appreciated!
Moderator & parts slinger
Joined: Feb 2007
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From: S/W Missouri, Polk county
90% ish, or some such number of 4wd 1979 F250 have a Dana 60 rear and a Dana 44 9F front axle. They both take your basic 80/90 gear lube. If you do have a Dana 60 (not a Dana 61) front axle, you are lucky. Those are worth a lot of $$ these days.
Front axle steering knuckles attached to the axle by 2 upper and lower ball joint (one big castellated nut on top)? ='s Dana 44
Same set up but attached with 4 bolt capped kingpins.='s Dana 60
Front axle steering knuckles attached to the axle by 2 upper and lower ball joint (one big castellated nut on top)? ='s Dana 44
Same set up but attached with 4 bolt capped kingpins.='s Dana 60
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
I have a 79 f250 4WD with a 400 6.6 I am restoring. It is time to change the differential fluid but I want to ensure I know exactly which differentials I have.
I have read some posts but I do not want to lean on my own understanding and would like y’all’s help.
The front differential tag reads: 3 54 D8TA-AEC 610040-2 //Rear diff reads: 3 54 D8TA-ADA 603900-12.
From what I can gather, the front diff is a Dana 61?
NOT!
I have read some posts but I do not want to lean on my own understanding and would like y’all’s help.
The front differential tag reads: 3 54 D8TA-AEC 610040-2 //Rear diff reads: 3 54 D8TA-ADA 603900-12.
From what I can gather, the front diff is a Dana 61?
NOT! Ford: D8TA-ADA / Dana: 603900-12 = Dana 60 Rear Axle // 3.54-1 // No Limited Slip // 5,300 lbs. Rear Axle Capacity // Parts list # 93.
The Dana 61 is a rear axle.
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