I have a high pinion reverse rotation 78 Ford Dana 60. I currently have 5.13 ring and pinions. I have a ff 14 bolt rear at the moment so that's the ratio I'm limited to.

What lower(numerically higher) gears are available for my front axel? And what rear axel would you reccomend I switch to when the time comes. I have 46" tires and about 350 horsepower. But I'm plannin to supercharge. I have a built 700R4.

My main problem is my torque converter is getting real hot. I just put a trans temp guage so I can prevent further tranny problems.

....advice?

Dana 70 for raw strenght. A Dana 60 for better clearence, but you'll spend alot more money in up grades on a D60 to get the added toughness of bigger shafts, carrier and such.

What about the Sterling 10.25"?

5.13s are as low as I have seen.

yukon has 5.38 high pinion 60 gears I think.

Yukon does have them as that is what I have. And I believe 5.38's are the lowest available.

5.38 as said before.

5.13's to 5.38's would make no real noticable difference.
Leave the axles alone, and get a tranny/t-case setup with better gearing.

Leave the axles you have alone. If you havent done it yet, add a huge giant assed tranny cooler, maybe a bigger pan too. Find the largest one you can fit behind your grille. An inline filter with a pressure guage and bypass valve is good insurance. If your torque converter fails, or you filter becomes plugged with crap, it will catch all of the crap before it circulates back into your transmission, the guage will (within reason) tell you how much restriction is in the filter (and when to change it) and the bypass filter is there when you are dumb and dont change the filter, it wont stop up the lines. Where do you have your guage sending unit located? I would put it in the pan if you have it elsewhere, this way it will tell you the overall temp, instead of only one area. If you keep having heat problems with your torque converter, you might look into getting a high performance super heavy duty RV style converter with a low stall speed. Or just put in a built 4L80E instead of punishing a 700R4.

5.13's to 5.38's would make no real noticable difference.
Leave the axles alone, and get a tranny/t-case setup with better gearing.

Right, no real gain.
You can switch to a low pinion Dana 60 and get some 7.17's though.

I have a high pinion reverse rotation 78 Ford Dana 60.

What lower(numerically higher) gears are available for my front axel?
....advice?
Spicer numbers

Modle 60 Reverse Spiral
Gear Kit # Ratio. Tooth. Gearset . Pinion. Ring
700020-1 3.54 (46 - 13) 660069-5 620094 620095 (Ford Only)
700020-2 4.10 (41 - 10) 660071 620107 620108 (Ford Only)

707475-1X 3.73 (41 - 11) 76161-5X 47919 47918
707475-2X 4.10 (41 - 10) 76159-5X 47912 620108
707475-3X 4.30 (43 - 10) 76160-5X 47915 47914
707475-4X 4.88 (39 - 08) 76163-5X 47922 47921
707475-5X 5.38 (43 - 08) 76164-5X 47926 47925
708123-1 3.73 (41 - 11) 76161-5X 47919 47918
708123-2 4.10 (41 - 10) 76159-5X 47912 620108
708123-3 4.30 (43 - 10) 76160-5X 47915 47914
708123-4 4.88 (39 - 08) 76163-5X 47922 47921
708123-5 5.38 (43 - 08) 76164-5X 47926 47925


Try aftermarket.



Incase your thinking a Dana 70... Check my Dana70 page for info, as different 70's have different offsets... here are the Spicer Gears you can get..... (I'll have a chart up someday on my site with this info in easier form to read...)

Ring & Pinion Kit Gear Teeth Gear Set Pinion Ring Replaced by# Used on
706999-3X 3.73 (41 - 11) 72160-5X 40962 38132 Double lapped for quieter operation: Used on Model 70B & 70HD with .625" offset of pinion*
706999-7X 4.56 (41 - 09) 72166-5X 40967 39275 Double lapped for quieter operation: Used on Model 70B & 70HD with .625" offset of pinion*
707055-2X 3.42 (41 - 12) 73029-5X 42237 42238 Model 70-3HD for GM. Not interchangeable with any other kits.
707055-3X 4.56 (41 - 09) 73032-5X 40958 42245 Model 70-3HD for GM. Not interchangeable with any other kits.
706048-10X 3.73 (41 - 11) 29715-1X 34836 38132 706999-3X Double lapped: Used on Model 70B & 70HD with .625" offset of pinion*
706048-11X 4.10 (41 - 10) 70875-1X 39276 39277 706999-5X Double lapped: Used on Model 70B & 70HD with .625" offset of pinion*
706048-12X 4.56 (41 - 09) 70874-1X 39274 39275 706999-7X Double lapped: Used on Model 70B & 70HD with .625" offset of pinion*
706061-9X 5.86 (41 - 07) 27305-1X 35977 35978 706999-11X Industrial off highway: Model 70HD (with 34848 Differential Bearing Spacer, included in 706061X kit)
706061-10X 7.17 (43 - 06) 70741-1X 39158 39159 706999-15X Industrial off highway: Model 70HD (with 34848 Differential Bearing Spacer, included in 706061X kit)
706600-13X 3.54 (46 - 13) 70891-1X 39286 39287 706999-1X Industrial off highway: Used on Model 70B & 70HD with .625" offset of pinion*
706600-9X 5.86 (41 - 07) 27305-1X 35977 35978 706997-11X Industrial off highway: Used on Model 70B & 70HD with .625" offset of pinion*
706999-11X 5.86 (41 - 07) 72163-5X 40964 35978 Industrial off highway: Used on Model 70B & 70HD with .625" offset of pinion*
706600-12X 6.17 (37 - 06) 70610-1X 39069 39070 706999-13X Industrial off highway: Used on Model 70B & 70HD with .625" offset of pinion*
706999-13X 6.17 (37 - 06) 72164-5X 40965 39070 Industrial off highway: Used on Model 70B & 70HD with .625" offset of pinion*
706600-10X 7.17 (43 - 06) 70741-1X 39158 39159 706999-15X Industrial off highway: Used on Model 70B & 70HD with .625" offset of pinion*
706999-15X 7.17 (43 - 06) 72165-5X 40966 39159 Industrial off highway: Used on Model 70B & 70HD with .625" offset of pinion*
706998-13X 3.07 (43 - 14) 73105-5X 42190 42336 Model 70 2UA
707250-1X 3.07 (43 - 14) 74305-5X 44194 42336 Model 70 2UA
706048-1X 3.73 (41 - 11) 26008-1X 34836 34837 Model 70 B and 70 HD
708015-1 3.54 (46 - 13) 76568-5X 48737 47838 Model 70-2U with .625" offset of pinion.
707407-1X 4.10 (41 - 10) 75999-5X 47532 47533 Model 70-2U with .625" offset of pinion.
708015-2 4.10 (41 - 10) 75999-5X 47532 47533 Model 70-2U with .625" offset of pinion.
707250-4X 4.56 (41 - 09) 74308-5X 44197 34842 Model 70-2U with .625" offset of pinion.
708015-3 7.17 (43 - 06) 74342-5X 44199 44065 Model 70-2U with .625" offset of pinion.
706999-1X 3.54 (46 - 13) 72168-5X 40969 39287 Model 70B & 70HD with .625" offset of pinion*
706048-1X 3.73 (41 - 11) 26008-1X 34836 34837 706999-2X Model 70B & 70HD with .625" offset of pinion*
706999-2X 3.73 (41 - 11) 72159-5X 40962 34837 Model 70B & 70HD with .625" offset of pinion*
706048-2X 4.10 (41 - 10) 26010-1X 34550 34840 706999-4X Model 70B & 70HD with .625" offset of pinion*
706999-4X 4.10 (41 - 10) 72154-5X 40959 34840 Model 70B & 70HD with .625" offset of pinion*
707482-1X 4.10 (41 - 10) 75999-5X 47532 47533 Model 70B & 70HD with .625" offset of pinion*
706048-3X 4.56 (41 - 09) 26013-1X 34549 34842 706999-6X Model 70B & 70HD with .625" offset of pinion*
706999-6X 4.56 (41 - 09) 72152-5X 40958 34842 Model 70B & 70HD with .625" offset of pinion*
707482-2X 4.56 (41 - 09) 76509-5X 48626 48625 Model 70B & 70HD with .625" offset of pinion*
706999-8X 4.88 (39 - 08) 72148-5X 40956 34808 Model 70B & 70HD with .625" offset of pinion*
706048-4X 4.88 (39 -08) 25965-1X 34546 34808 706999-8X Model 70B & 70HD with .625" offset of pinion*
706999-9X 5.13 (41 - 08) 72150-5X 40957 34810 Model 70B & 70HD with .625" offset of pinion*
706048-5X 5.13 (41 -08) 25966-1X 34547 34810 706999-9X Model 70B & 70HD with .625" offset of pinion*
706999-10X 5.86 (41 - 07) 72156-5X 40960 34812 Model 70B & 70HD with .625" offset of pinion*
706048-6X 5.86 (41 -07) 25967-1X 34715 34812 706999-10X Model 70B & 70HD with .625" offset of pinion*
706048-7X 6.17 (37 - 06) 25968-1X 34814 34815 706999-12X Model 70B & 70HD with .625" offset of pinion*
706999-12X 6.17 (37 - 06) 72157-5X 40961 34815 Model 70B & 70HD with .625" offset of pinion*
706048-8X 7.17 (43 - 06) 26636-1X 35116 35307 706999-14X Model 70B & 70HD with .625" offset of pinion*
706999-14X 7.17 (43 - 06) 72162-5X 40963 35307 Model 70B & 70HD with .625" offset of pinion*
706048-9X Void Model 70B & 70HD with .625" offset of pinion*
706061-1X 3.73 (41 - 11) 26008-1X 34836 34837 706999-2X Model 70HD (with 34848 Differential Bearing Spacer, included in 706061X kit)
706061-2X 4.10 (41 - 10) 26010-1X 34550 34840 706999-4X Model 70HD (with 34848 Differential Bearing Spacer, included in 706061X kit)
706061-3X 4.56 (41 - 09) 26013-1X 34549 34842 706999-6X Model 70HD (with 34848 Differential Bearing Spacer, included in 706061X kit)
706061-4X 4.88 (39 - 08) 25965-1X 34546 34808 706999-8X Model 70HD (with 34848 Differential Bearing Spacer, included in 706061X kit)
706061-5X 5.13 (41 - 08) 25966-1X 34547 34810 706999-9X Model 70HD (with 34848 Differential Bearing Spacer, included in 706061X kit)
706061-6X 5.86 (41 - 07) 25967-1X 34715 34812 706999-10X Model 70HD (with 34848 Differential Bearing Spacer, included in 706061X kit)
706061-7X 6.17 (37 - 06) 25968-1X 34814 34815 706999-12X Model 70HD (with 34848 Differential Bearing Spacer, included in 706061X kit)
706061-8X 7.17 (43 - 06) 26636-1X 35116 35307 706999-14X Model 70HD (with 34848 Differential Bearing Spacer, included in 706061X kit)
706091-1X 4.10 (41 - 10) 25612-1X 34550 31711 706997-1X Model 70U with .625" offset of pinion
706091-2X 4.56 (41 - 09) 25611-1X 34549 34110 706997-2X Model 70U with .625" offset of pinion
706091-3X 4.88 (39 - 08) 25608-1X 34546 30794 706997-3X Model 70U with .625" offset of pinion
706091-4X 5.13 (41 - 08) 25609-1X 34547 31169 706997-4X Model 70U with .625" offset of pinion
706091-5X 5.86 (41 - 07) 25782-1X 34715 34714 706997-5X Model 70U with .625" offset of pinion
706091-9X 6.17 (37 - 06) 22752-1X 32082 31962 none Model 70U with .625" offset of pinion
706091-6X 6.17 (37 - 06) 26031-1X 34814 31962 706997-6X Model 70U with .625" offset of pinion
706091-7X 7.17 (43 - 06) 26355-1X 35116 32742 706997-7X Model 70U with .625" offset of pinion
706997-7X 7.17 (43 - 06) 72161-5X 40963 32742 - Model 70U with .625" offset of pinion
706091-8X Void Model 70U with .625" offset of pinion
707055-1X 3.21 (45 - 14) 73028-5X 42233 42234
708015-4 3.54 (46 - 13) 76568-5X 48737 48738
708149-1 3.54 (46 - 13) 76568-5X 48737 48738
708015-5 4.10 (41 - 10) 75999-5X 47532 47533
708126-1 4.10 (41 - 10) 75999-5X 47532 47533
708149-2 4.10 (41 - 10) 75999-5X 47532 47533
708074-1 4.10 (41 - 10) 84018-5X 50080 50081
708074-3 4.10 (41 - 10) 84055-5 51171 51172
708127-1 4.10 (41 - 10) 84055-5 51171 51172
708126-3 4.10 (41 - 10) 84846-5 52974 52975
708074-2 4.56 (41 - 09) 84017-5X 50076 50077
708074-4 4.56 (41 - 09) 84057-5 51176 51177
708127-2 4.56 (41 - 09) 84057-5 51176 51177
708015-6 7.17 (43 - 06) 74342-5X 44199 44065

Just curious, but has anyone ever heard of someone machining custom gear sets?

I do have an in-line cooler on my tranny, but I just added a deeper pan with cooling tubes after I rebuilt my tranny. I haven't got to test this out yet. I haven't installed my trans temp guage yet. But its an autometer and has the inline sender.

Does anyone offer a 4:1 gearset for a driverside drop t-case?

Don't want to drop the cash for an Atlas right now.