Does changing rear gears effect Front diff?
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Does changing rear gears effect Front diff?
What i'm asking is if i change my rear 3.55 gears to say something like 4.30's, and i engage 4wd, will it effect the driveline in a negative way? Because the front stay at 3.55.
Posting Guru
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Disaster. Your front differential will be dragging the rear differential. Your antiskid will be continuously engaged and antilock will disengage when in 4WD. Everything from the transmission, transfer case, differentials and axles will be trashed.
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Thank you!
Cross-Country
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Back in the day it was pretty common to run a slightly faster gearing in the front diff but 3.55 to 4.30 is way too much and with all the electronic traction control systems I don't think that is done anymore.
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I was reading through some threads where people changed thier rear gears but never mentioned replacing them in the front.
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Years ago I ran one step taller (3.55/3.73) in the front for running mostly in the sand. It worked OK for snow and mud too, but not so much in the rain. Ended up twisting the rear driveshaft off off-roading. Not sure if it was the cause, but I wouldn’t do it again with all the electronics nowadays.
Frmr Ford Trans Engr
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If you never use four wheel drive you will be fine. From actual experience if you do engage four wheel drive you can expect the transfer case to explode.
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Laughing Gas
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