I've seen a couple people swap out 3.73's to 4.30's. I'm thinking about doing the same thing. Where did you buy the gears? What brand did you go with? And how much did the install cost? Thanks

 

Best place for the parts and price is the Ford dealer. The rear is pretty much the gearset but it's cheaper than most places plus you get seals and crush sleeve. Yukon will sell you a repackaged Ford gear, not sure if nitro is their own or not, aftermarket includes no other parts they are separate kits. The inner pinion bearing is not supported with most pullers so you will most likely need another one, about $80 at the dealer and as of last year it was dealer only. Pinion shims are not included either. The front is pretty much a complete kit minus carrier bearings. If you need a full bearing kit you are better off getting the Ford kit and get the rest on Amazon. Good idea to replace the knuckle seals on the front. I was out the door an my dealer for around $800 for the gears and about $200 for seals, extra shims and other small stuff. I did my own install, so you'll have that labor too, $250 an axle is about starting price in my area. Check fordpartsbin.com and they have everything listed with a price.

 

+1 seems like what I remember people saying here that is was like $2500 for 4x4.

What part of the country do you live in, there is a pretty good place in southeast texas....thats all they do.

 

I remember hearing a quote on here too. Can't find it now though. I think it was $2500-3500, with installation at a ford dealer. I could have the number wrong though.

 

Dealership will likely be most expensive place for the install but from my experience best value on parts. A shop that specializes in diffs/transmissions will be cheaper for the install. Regardless of shop you want a place with a good reputation and stands behind the work.

 

I have 2015 platinum 350 6.2. I was quoted $3200 with a tuner. Still debating on doing mine as main hang up is voiding the warranty. Mechanic works at ford that will do it but ford won't back the warranty and they won't do it at the dealership.

 

I'm north of Dallas. Do you have the name of the shop?

 

Price isn't a problem, I need to know what parts I need and a good place to get it done at. I know the dealership would be the most expensive but if there are shops out there with good reps in Texas then I would go there.

 

Unless you want a tuner no need for one. The speedo uses the wheel sensors so gear ratio has no effect on the speedo. Change the tire size and that's a different story. Parts wise Randy's r&p has everything but you are going to pay. The question is whether you want or need a master install kit, it's about $400 last time I checked. If you buy the Ford stuff no need for a master kit, if you want all new bearings just source the carrier bearing locally. The rear needs a super shim kit for the carrier being factory shims are ground, eBay is the place for that. That I found other than specific part numbers from Ford the rear pinion shims aren't available anywhere. The cheap and easy solution there is to set it up with Dana 70 pinion (ebay) shims under the race. No big deal being there is plenty of depth under the race and you only need .030 or so if shim. Technically this is a stonger setup than under the pinion. The front Ford kit plus carrier bearings is a good idea on the front being the shims are under the bearing. Amazon had them cheapest. The carrier bearings are the same as any normal Dana 60 but races are not they are thicker. Replace the axle knuckle seals being you will probably bend them during removal, Amazon. Those Ford kits plus those parts will get everything installed. I don't remember all the bearing numbers but I crossed them on rock auto and got the timken parts on Amazon and the shims on eBay.

 

Pyle Bros Baytown Tx

 

As for the warranty, I wonder if they () would even snap to it

 

Lol yea that's south east alright.

 

Did you end up doing the swap? I realized after my spring break toy hauler trip the 4.30 is a must for me. I didn't even use 6th with my 8k TH. Heck, I don't even need it for most of my daily driving. Ford dealers should have more 4.30s to choose from for sure. Its annoying to have to order them. I will no doubt order them on my new truck. I'm thinking the roughly $3k for a swap will be better served as more trade in cash on a new one.

 

Maybe of more ordered them they would start stockings them but that would make sense.

Denny

 

I think in general, when salesmen or sales managers hear 4.30's they assume a generally negative view. They surely don't ask around forums like this or try to educate SD gas buyers as to the pro's of the 4.30 gears. I only know from this site and first hand experience owning a 6.2 with 3.73 gears. To me, they are hwy gears when coupled to the double overdrive 6r140. For anyone who tows, does a lot of town driving, never does a lot of 75-80 mph, loads up the truck, likes oversize tires, or just wants to maximize the torque curve, the 4.30's are the way to go.