Dana 70 question
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Dana 70 question
Guys can a Dana 70 rear axle from a 1965 to 1972 F350 run a 3.54 ring and pinion with a carrier change? I have been told 4.10 is the tallest gear that can be run in these year model axles. Could someone also tell me if braking and / or stoping a load would be significantly improved if replacing a Dana 60 under a 1966 F250. Any advice / information appreciated. Thanks!
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Guys can a Dana 70 rear axle from a 1965 to 1972 F350 run a 3.54 ring and pinion with a carrier change? I have been told 4.10 is the tallest gear that can be run in these year model axles. Could someone also tell me if braking and / or stoping a load would be significantly improved if replacing a Dana 60 under a 1966 F250. Any advice / information appreciated. Thanks!
1961/65: 4.86 - 5.23 - 5.87. 1966: add 4.10 & 4.56. 1967/79: add 3.73, subtract 5.87.
3.73 & 4.10 use a different case than the other ratios.
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Yes,the carrier break is between 4.56's and 4.10's.
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So I can swap the 5.13 ring/pinion in my '61 F-350 (with Dana 70) for a later 4.56 set without changing the carrier?
Thanks,
Steve
Thanks,
Steve
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Ford Parts Specialist
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^ Yes, see post #3. ^
But where would someone find a Dana 70 3.54-1 ring & pinion? How much will it cost if found?
But where would someone find a Dana 70 3.54-1 ring & pinion? How much will it cost if found?
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From: Townsend, MT
Or online for $205 plus shipping:
Motive Gear DANA 70 Gears
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OP's 1965 F350 Dana 70's ring gear & companion flange have 10 splines, u-joint has 1310 sized cups.
1967 and later, the companion flange has 29 splines, but there are 3 different types as there are 3 different sizes of u-joint cups: 1310's, 1330's or 1350's.
Most likely the R&P that the OP buys, the ring gear will have 29 splines, so he'll have to change the companion flange.
1967 and later, the companion flange has 29 splines, but there are 3 different types as there are 3 different sizes of u-joint cups: 1310's, 1330's or 1350's.
Most likely the R&P that the OP buys, the ring gear will have 29 splines, so he'll have to change the companion flange.
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