All I know is to drive it 500 miles and then drop the gear oil and put in clean stuff. What else do you mean?

Blue

 

Gear break in:
Keep speeds low and acceleration slow for the first 500 miles.

Start with low speed runs for 15 or so minutes at speeds less than 35. Drive it, then let it cool. Repeat ad nauseum. After you do that for a couple days, you can got a little longer and a little faster. Keep checking the diff temp with your hand. It is truly amazing how hot it gets at first.

The numbers above were rough, but should give a good ball park idea.

 

Does the break in period essentially "temper" the steel in the gears?

 

The procedures are listed over at Randy's Ring and Pinion website and I believe Roger Brown (AKA 4Crawler) has some listed on his site too.

 

I've cut/pasted since I can't post a direct link,

" Even with synthetic oils, I still recommend the following procedure for breaking in a new gear set: After driving the first 15 to 20 miles it is best to stop and let the differential cool before proceeding. Keep the vehicle at speeds below 60 mph for the first 100 miles. I also recommend putting at least 500 miles on the new gear set before heavy use or towing. During the first 45 miles of towing it helps to go about 15 miles at a time before stopping to let the differential cool for 15 minutes before continuing. This is necessary because not all of the gear tooth is making contact until it is heavily loaded. When towing, the teeth flex to contact completely, and cause the previously unloaded portion of the teeth to touch and work harden. All of this may seem like paranoia, but it is very easy to damage the ring & pinion by overloading before the teeth are broken in. If you take it easy on a new ring & pinion and keep it full of high quality oil, it should last a lot longer."

 

Roger Brown's procedure can be found HERE.

 

Jesus Pete. Guess reading the instructions would have been wise. Ive played already. Nothing seems messed up but guess I won't know until further down the road. Guess its time to take a chill pill and do it right. Thanks for the info. Blue

 

He got the gears from Reider Racing. He's having this pro ASE cert'd Toyota tech he knows do the gear setup/install. He has all the necessary tools to setup gears and can even do the checking distance so it usually only takes about 1-2 shots at most to get the gear pattern perfect.

So how are the gears working out? Have you burnt them up yet? How's the locker? If you have any probs with your diffs I'll fix em, all my work is warranted for as long as I feel like it. Don't forget it's a Toyota, it won't break. If it were my diff I'd reuse those pinion bearings anyways and keep the new ones for another day. They're usually good for 2.5x10^8+ miles if you keep clean oil in them. I was hoping for more of a response out of the 25% lower gears too. Your truck does weigh a lot though.

What your truck needs is more power.. and a manual tranny! I'm looking into improving the flowability of a set of 3VZ-E heads. It's quite obvious the stock casting flows horribly. I'm trying to score a set of eBay heads and some used intake manifold gaskets from a V06 to port match. Does anyone have any information on how the 3VZ-E heads respond to porting work? I'm estimating there's about 20-25 HP to be gained from some porting. My goal is to out accelerate a 5VZ-FE manual tranny and I'll be happy. I'm sure I'll need to take it further than porting some heads to do that though.

 

Yoooooooo Mikeyyyyyy the gears are sweet. But I guess I wasnt spose to find out yet. Ive been kinda careful but I have at the same time turned the tires. I will be careful though. Its a tough call as to how much power ive got rollin but an increase in FM is already there for sure. Im coming on a half tank now with 63 on the tripometer. Normally I would be lucky to have 50 on the tripomter. If I were a little lighter on the pedal and the fuel were not so chitty I could be much higher. I am very glad I went with gearing up to 5.29s. Do you think its safe to take it up in the hills on Sunday like we planned being its still so early in the break in period? Dont get me wrong im game but not if it will fry my gears like steak. Lemme know. Oh yeah got my rockcrawlers in today. Still on for the slider install Saturday? Ben

 

Saturday it is for the slider install. I would say it's safe to take it up in the hills if you have at least a 150 miles on them. Lets just be sure to check your diff for heat buildup on a regular basis. If the diff is staying cool then there's nothing to worry about.

 

K then Saturday I got off between 5 & 6 & dont have to be to work til 9:30. So when it glows bright red thats not good? lol jk, no glowing yet.