badasp118
Full Access Member
I was told by the operator of a local salvage yard that 3:55 gears will not fit in my rear end in place of my 4:10 gears? I know alot of you have done this swap.........any input?
rear end gears
- Thread starter badasp118
- Start date
Goofyexponent
Mentally Unstable..
Whynot? lol. It is just a ring and pinion swap. Tell him to point out your spark plug wires so you can change them too lol
3.55's are the option for Ford rearends, and 3.54's are the option for the Dana rearend.
3.55's are the option for Ford rearends, and 3.54's are the option for the Dana rearend.
jperecko
Diesel Ape
^ What he said
ocnorb
IDIT
He may be technically correct that you cannot swap "just" the ring and pinion. I have run into this before. The thickness of the ring gear varies by ratio, so some gear ratios require a carrier with a different offset.
No big deal, but you may want to swap the pinion and carrier/ring gear assembly.
If it was me I would rather just swap the whole rear axle if it is available.
No big deal, but you may want to swap the pinion and carrier/ring gear assembly.
If it was me I would rather just swap the whole rear axle if it is available.
jperecko
Diesel Ape
Think that is really only an issue if you deal with the lower gears... there is one configuration for 4.10 and lower and another for anything higher... but 4.10 to 3.55 or 3.54 should not be an issue as long as it isinstalled correctly.
ocnorb
IDIT
Probably true- It been a while...I ran into the issue while putting 5.38's in my Bronco!
gonecrazyi
Full Access Member
I thought you ran into issues with axles geared for 4.11's. Something about needing another carrier to run 4.10 or 3.55
sle2115
NRA LIFE MEMBER
I'm putting 3.73's in place of my 4.10's, or should I say, have put them in. Carrier is the same on the 10.25 from 4.10 and numerically lower gear sets (3.73, 3.54, 3.08, etc.) and another carrier for 4.56 and numerically higher sets (5.08, etc.)
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Goofyexponent
Mentally Unstable..
ocnorb
IDIT
Sure - High Output 5.0 (high revver) + NV4500 (OD) + 35x12.50's= Great all around truck. Plenty of low end and I could get 16 mpg on highway trips.
BigRigTech
Diesel junky
It's a bolt in deal, I did the 4.10 to 3.55's on my truck, piece of cake.
johnnyb1
Full Access Member
Yea.Slide out the axles,drop the "punkin". In with the new and that's it
sle2115
NRA LIFE MEMBER
johnnyb1
Full Access Member
I did the punkin in one of our pete's by myself in 4 hours. Did a E350 in 2 hrs. By myself.
Metalmacguyver
Full Access Member
Do you know what bearing preload is? How about backlash? How about contact pattern?
For someone that has never setup gears, just swap the whole axle housing. Put new brakes on if you need them or just swap the entire brake assembly by unbolting the backing plate from the axle.
For someone that has never setup gears, just swap the whole axle housing. Put new brakes on if you need them or just swap the entire brake assembly by unbolting the backing plate from the axle.
