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View Full Version : How hard is to hard

Onebadbee
03-13-2010, 08:12 PM
4.56's and DTT

i have it put in and everything seems to be going fine

question is during the break in period how hard is to hard?

i have only gotten up to 65-70 in them

couple of burn outs just from not being use to them 1/4 throttle will break them loose

no driving distance of more then 10 miles at a pop

j/w if i had fucked them up already
ramcrazy
03-13-2010, 08:23 PM
What makes you think that? Hell I ran mine 20 mins across town,let them cool. Did that 3 more times and then I just had fun.At 500 miles my
shop opened them up, checked the backlash and I was good to go.
My gears have run great from day one:Tup:
Onebadbee
03-13-2010, 08:30 PM
read a post from jmgk with metal cooling and all that good stuff and his post makes perfect sense

and i have done a couple of hard things and chefred said he did some hard stuff with his and had to take them back in

just making sure
03DakStampede
03-13-2010, 08:33 PM
When I installed mine I drove it for 10 min or so let them cool down did that again then started beatin the carp out of them. No problems and 10k later and everything still looks good.
Onebadbee
03-13-2010, 08:38 PM
got more balls then i do dakota

im only doing this cause in the past when i did not take precaution on mods. those mods would end up failing and i dont want that with this truck
Spedly
03-13-2010, 09:16 PM
As long as you heat cycle them you'll be fine. I usually run them for 15min or so untill the diff is warm then let them fully cool then repeat 2 more times. Then change the fluid and beat the shit out of them.
jmgak47
03-14-2010, 03:05 AM
My dick!

That is all...
03DakStampede
03-14-2010, 08:07 PM
My dick!

That is all...

thats not what she said.
jmgak47
03-14-2010, 09:01 PM
thats not what she said.

Nope, she was to busy moaning and screaming! :D
Onebadbee
03-15-2010, 01:05 AM
thats not what she said.

dont you mean not what he said
otter1363
03-15-2010, 01:46 AM
wow - I had no idea you had to break in gears. I drove mine ~30 min home from the shop. Did a nice burnout too.... Been like 2000 miles now with no noise clunks or other nasty stuff so I guess I didnt fuck anything up (I hope)...
Onebadbee
03-15-2010, 02:36 AM
mine are wearing just find took the cover off again to make

sure

talked to hemi450 when he put his 4.56s in he said they whinned no matter what

ill take matts word for it
daytonahemi392
03-15-2010, 02:55 AM
my 4.56' s whine a bit under no load. Nothings broken yet and I tow and beat the piss out of them every time I drive the truck.
Onebadbee
03-15-2010, 03:01 AM
my 4.56' s whine a bit under no load. Nothings broken yet and I tow and beat the piss out of them every time I drive the truck.

i get the same thing under no load and i dont really care the performance is awesome
austin4.7
06-03-2011, 04:16 AM
rearends dont need break in... drive like you stole it
otter1363
06-03-2011, 04:17 AM
...and thats exactly what I did
ramcrazy
06-03-2011, 10:50 PM
All new gear sets require a break-in period to prevent damage from overheating. After driving the first 15 or 20 miles it is best to let the differential cool before proceeding. I recommend at least 500 miles before towing. I also recommend towing for very short distances (less than 15 miles) and letting the differential cool before continuing during the first 45 towing miles. This may seem unnecessary but I have seen many differentials damaged from being loaded before the gear set was broken in.
I also recommend changing the gear oil after the first 500 miles. This will remove any metal particles or phosphorus coating that has come from the new gear set.

But after all it's your money,right?
Hemidup
06-04-2011, 01:19 AM
Here's how we break in gears.

Jack the rear of the vehicle up on jack stands.

Put the vehicle in low gear and let her spin for 20 minutes.

Let the rear end fluid completly cool down to ambient temps.

Once cooled, put it in reverse and let her spin for another 20 minutes.

Let the rear end fluid completly cool down to ambient temps.

Once cooled, go out and thrash the piss out of it.
hemigoat
06-04-2011, 02:44 AM
Here's how we break in gears.

Jack the rear of the vehicle up on jack stands.

Put the vehicle in low gear and let her spin for 20 minutes.

Let the rear end fluid completly cool down to ambient temps.

Once cooled, put it in reverse and let her spin for another 20 minutes.

Let the rear end fluid completly cool down to ambient temps.

Once cooled, go out and thrash the piss out of it.



I have seen more done this way than any other!:Tup:
DaKing
06-04-2011, 03:39 AM
Friday I new gears installed. I drove the truck a bit.. Saturday I went racing. Two years later, they still spin round and round. :)
Kotta390
06-04-2011, 05:11 PM
I got new gears and a factory LSD, and I was TOLD to let them break in for around 200-300miles before I did a burnout or tow anything with it. The truck was on the lift running in gear for about 10 minutes at idle and part throttle, so if anything he prolly broke in the gears for me?


I dont believe in break-ins on gears, too many sets of gears I have gotten and NONE of them broke. As soon as I got my 4.56s, I waited for the shop guy to leave and did a massive burnout in front of his shop, then towed a ram charger on my 1300lb trailer within 100 miles of the gears life and I still have ZERO issues with mine. So IMHO I think your prolly ok.
67charger
06-05-2011, 03:44 AM
The best way to break stuff in IMO is to heat it up to operating temp and go all out. If it breaks the first time, it's too weak
Kotta390
06-06-2011, 04:05 AM
The best way to break stuff in IMO is to heat it up to operating temp and go all out. If it breaks the first time, it's too weak

I like the way you think!:cheers: