jNovina

At the end of February I bent the rear axle on my 2008 FX4. Had a shop that the owner is a friend of my wife's family replace it. I noticed at the end of winter that my 4 wheel drive was not working. I just finally got off my *** and figured out what the problem was and replaced the 4WD hub locking solenoid. Engaged my 4WD and started to drive down the road and sounded and felt like I was dragging the rear tires. Disengaged the 4WD and it slammed out due to it being in a bind. Got home and checked the badge on the door and it says I should have a 3.73 rear end gear. Jacked up the rear end, marked the tire and drive shaft , turned the tire one full turn. They put in the wrong rear end! They put in a 3.55 gear ratio. Sorry I am extremely mad and just needed to vent. Looks like I'm calling the mechanic in the morning and getting this taken care of.

majerus

I would call him and have him fix it...

jNovina

Oh yea, I'm not paying for his mess up. I've already paid for it to be fixed. I'm hoping that he ordered the correct one and the company he ordered it from geared it wrong. But why wouldn't he have checked the ratio when he put it in.

Nocturnal1

This is one of those "you can make this up!".

Sorry to hear. Good luck.

jNovina

Well looks like my mechanic ordered the correct rear end and shop that the rebuilt rear end thought they shipped the correct one. Who ever rebuilt it put the wrong gears in. Hey this might be part of my crappy 12.8 MPG problem also huh!

Crazy4x4

I kinda am in a similar situation. I got a 04 F150 4x4, my rear axle was in bad shape, bad ring gear noise, the LSD springs failed and killed the clutches and pieces killed the gear teeth. I ordered a used 3.73 LSD complete axle. When I got it, I opened it up to inspect it, turns out is a 3.55 LSD. After calling the place that I order it from, they didn't have any others around the nation. So I got a partial refund. I had to install the 3.55 axle, I can't afford the downtime since once I disassembled the old axle, the entire axle shaft came out once I removed the rotor.

So now it is driveable, just not in 4wd. So now when I can afford the downtime and the money later on this fall, I'll have to get the rear end rebuilt with the correct gears and all.

To the OP that shop should have at least opened the rear end they received and changed oil and inspected the internals, which takes 5-10 mins. That is not a reliable shop if they didn't at least do that.

scobar

iTrader: (4)

I would explode. Literally...

If they put the wrong running gear in when doing the first repair I certainly would not want them to touch it again. There is a tag on the friggin' rear end for crying out loud that says what's in it! Your ratio is stamped on a metal tag. If it is supposed to be 3.73 and a t-lok then it would be stamped 3z73. If it is an open rear then it would be stamped 3 73.

scobar

iTrader: (4)

Your MPG would improve on 3.55 vs. 3.73. Numerically lower gears improve MPG, decrease acceleration. Numerically higher gears decrease MPG(most cases) and improve acceleration.

Toshbar

Lets hear how you bent your axle.....

jNovina

Toshbar
This is from my post in February [QUOTE="jNovina;4261737"] So yesterday as I was pulling out of the gas station I misjudged the placement of my F-150 and clipped a guard post at the pump with my passenger rear tire. Now I was going less than 5 MPH, I got out of the truck to see what damage I just did to my truck. Noticed that I cracked the rim and the tire was shifted back in the wheel well so I assumed that I sheared the alignment pin. No body damage, so I took the truck home and took my other truck to work. When I got home I jacked the rear end up and took a better look at the damage and saw the alignment pin was still on tacked but the passenger side housing tube and axle were bent! Now I understand that I made an idiot move by hitting the post but can someone explain to me how in the hell an axle could bend that easy!"