Changing to a 4.10 rear axle from a newer model truck.

[danno]

Good evening IDI friends! Found a 4.10 geared rear end in my area, says it’s from a 2000 F250 would I be able to fit this up easily on my ‘86? I’ve worked on a lot of things but never swapped an axle the guys on dirt every day make it look easy… most I can think I would need would be a different drive shaft and/or yoke setup… anybody have experience with this? Disc brakes would be nice along with towing benefits of 4.10……

Rear Axle 4.10 Ratio ID S156E Fits 99-00 FORD F250SD PICKUP 2940597 | eBay

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Rear Axle 4.10 Ratio ID S156E Fits 99-00 FORD F250SD PICKUP 2940597​

This part was removed from:​

• Year: 2000​

• Model: F250SD​

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Says it fits:

EXCURSION 00 (10.50" ring gear), 4.10 ratio, ID S157C
FORD F350SD PICKUP 99-00 10.50" ring gear, SRW, 4.10 ratio, ID S157F
FORD F250SD PICKUP 99-00 4.10 ratio, ID S156E
FORD F250SD PICKUP 99-00 4.10 ratio, ID S156C
FORD F250SD PICKUP 99-00 4.10 ratio, ID S157F
EXCURSION 00 (10.50" ring gear), 4.10 ratio, ID S157F
EXCURSION 00 (10.50" ring gear), 4.10 ratio, ID SPM157D
FORD F250SD PICKUP 99-00 4.10 ratio, ID S156F
FORD F250SD PICKUP 99-00 4.10 ratio, ID S157E
FORD F250SD PICKUP 99-00 4.10 ratio, ID S157C
FORD F350SD PICKUP 99-00 10.50" ring gear, SRW, 4.10 ratio, ID S157C
EXCURSION 00 (10.50" ring gear), 4.10 ratio, ID S411A
FORD F350SD PICKUP 99-00 10.50" ring gear, SRW, 4.10 ratio, ID S157E​

 

[gnathv]

You will need different rims for the rear. Though they are both 8 lug, the spacing is different.

 

[u2slow]

Pickup axle/spring perch spacing is the same between 86 and 2000. Overall width grows a couple inches. And yes, the bolt pattern changes.

If you are changing the yoke/flange, get a crush-sleeve eliminator beforehand. Also, your old yoke is incorrect for the newer diff. Brake biasing/effort may need to be addressed switching to disc (i.e. prop valve, MC, hysdroboost, etc.)

 

[Jesus Freak]

They're right, might be a pain.