Gears and Lockers BS Thread

Break in

 

Got my truck back today. I did the first 15 min drive and let it cool already. Will do it again twice after work. I drove easy so it was hard to tell much of a difference, but there definitely is one. I can't wait to get on it.

 

My RPM @ 70mph with 4.56 gears on 315/70R17s. Yes my speedo is off, I had my GPS giving me the correct speed

 

Getting the speedo fixer that mr grimm has is next on my left of purchases.

 

I always wondered how to fix em, links?

 

yeah but for $190ish?! I'd rather just use the free app on my phone to calculate speed

 

that's actually pretty good. I have 4.56 and 33s and it's a lot higher (and louder) at 70mph

 

Pretty sure I will only be a few off with re-gear though. I won't get it unless its off by quite a bit.

http://www.hypertech-inc.com/products-speedometer-calibrator.aspx

 

At this point I am sure you are over 10% off. I know for the autos the regear doesn't change anything with the speedo.

 

I am off 10% ish right now. With 4.88's I believe I am back at stock and within 1mph.

 

On my way to pick up my truck can't wait! I'm going to try to drive as much as possible this weekend so I could get closer to 500

 

my RPMs are at 2,500 @ 70MPH with 35x12.50r17 BFG bajas 4.56s gear

 

So I was told (in order to save a little $) that I could use napa 80-90 non synthetic oil basically for the break in period (500 miles) then switch to valvoline full synthetic 75-90. I might just go valvoline all the way for the safety and longevity of my new gears...

 

Has everyone's orders shipped from the group buy? I ordered assembled 3rds and my credit card hasn't even been charged yet.

 

Give them a call. I have had my assembled 3rds for like a week and a half now.

 

You will want to use straight dino for break in.

1. You won't get the heat high enough with synthetic to break the gears in properly.
2. You'll be dumping it in 500 miles after break-in. Waste of money.

 

Thanks for the info!

 

This. You guys are WAY overthinking breaking in your gears.

After install, run 20 miles. Stop and let cool completely. Do it again. Don't tow anything for 500 or so miles. You're good to go. If you do this and they break, they're either cheap gears or a bad install.

 

I did this and will be changing the oil at 500 miles. I'm sticking with the stuff ECGS said to use. Maybe I'll switch to synthetic next time.

 

A trip to Vegas and back with plenty of stops and cool downs... get's the job done.