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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

10.25 swap

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Old Mar 27, 2023 | 07:30 PM
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stpackard
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10.25 swap

Can't leave well enough alone, so going through a 10.25. The 1310/1330 combo rear driveshaft is holding but would like to put some road miles and mountain roads on this summer and instead of blowing a wad on a new 1350 driveshaft/yokes, etc. for the 16 spline dana 60 and risk a breakdown, I figured now would be the best time.

Found a 96' with heavily spun carrier races, so found a 92'. Housings are the same on the years. 96 yoke is longer than the 92. Here's the difference between 96' and 92' pinion splines.


about 3/8" more spline length on '96
 
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Old Mar 27, 2023 | 07:40 PM
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Trac-lok carrier runout less than .001" so this is a runner. Have a replacement 3.55 gear set. Both axles rotate same direction and clutches don't appear to be worn (without taking it apart) so am going to run it. Know there's a tool out there to check break free torque on the clutches but worst that can happen is it runs as an open diff.

Replacing gear set, did the carrier in the freezer, RG in the oven trick, then locktite and star torqued the bolts. Cross pin was worn and swapped in a NOS.

VEVOR clamshell kit pulls carrier and pinion bearings without flaw, and found the tool set around $100.


making inner and outer pinion setup bearings

I can't get these pictures smaller, anyone have any issues with this pattern? Backlash average .010".



Original pinion shim was .023", ended up with .025" for this pattern

Coast side seems a bit heavy on the heal but might run this

ring and pinion log sheet and shims setup

 
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Old Mar 27, 2023 | 08:23 PM
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stpackard
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Big Thanks smoky_diesel and GPatrick for 10.25 suggestions and tips! Would be a babe in the woods at my own devices.

With the diesel, there's noticiable axle wrap/wheel hop, so going to make traction bars. Video of pinion on acceleration shows wrap but not terrible with the 9 leaf springs.


Stuff from Ballistic, ruff-stuff, currie enterprises, sky's offroad

Was going to do a super duty rear suspension setup but decided to stick with the original.

To minimize suspension bind with traction bars the plan is to weld axle link mounts, use PVC pipe and cycle suspension to find a point on the frame where the track bar joint changes length the least amount in the frame mount bolt hole. Realize there's different formulas out there: long as possible, copy drive shaft angle, > 1/3 of the wheel base, or set lengths, but these seem a bit by guess/by golly. Was considering a shackle based ladder bar design like smoky_diesel and Lrrr_RulerofOmnicron but decided on standards.

Bars will have L and R hand threading for varying length. Truck will likely be used mostly onroad daily driving and some light off roading / mountaineering. There's not much rock crawling to be had in the plains of Nebraska.
 
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