My friend has a 97 1 ton w/ 4:10 gears he wants to chang out to a 3:55 or at least 3:72 ---- how& what does he need to do . Any help sure would be apprecated. THANKS.

 

Not enought info. Is it a 4x4 ?

 

My thinking is a whole lot faster than my typin!!! It's a 97 3500(d350)auto., I didn't know you could run at 80 mph. w 4:10's ,but then i only dr., 60-68. I would think that hy. rpm.,would nnot be gooood,on the eng. or rearend! This info., is for a friend of mine., someone told him hecouldn't get or they didn't make rin-gear&pinion for his trk., in 3:55 ,i told him " I know some PEOPLE".

 

it is a standard Dana rear end. parts are everywhere. is it a 4x4? if so, he will have to change front gears to prevent t-case damage

 

Sorry about the confusion,, it's just 2- wheel , dullie., I would take a name or any info., to pass on to his mech.,THANKS.

 

Yes if you can find the parts.It will be a lot easy er to do than if it was a 4x4.

 

I just added a Gear Venders Overdrive Unit ($3200) to get away from 4:10's, fuel mileage is up, and still able to tow 28 foot 5th wheel. I would stay away from 4:10's again, If I could help it.