1CAMWNDR

iTrader: (21)

I am thinking of going with 90W dino oil for the break-in, but how much fluid do I use? Might switch to 80W synthetic after 500 mile break in.

SStillSSmokin

I think mine took just about 3 qts. till it was running out the hole.

1CAMWNDR

iTrader: (21)

OK. Thanks .

Scott@DrivelineSolutions

iTrader: (22)

Try to use a quality oil, Kendal or Wolf's Head, are usually what I recomend.

CTSmechanic

iTrader: (2)

Also try not to over fill it or you'll get a vent problem... if its running out its a litle too full..

Tally TransAm

iTrader: (17)

mine has the optional fill plug. i put 4 quarts in and still couldnt feel it on my finger before i said ok thats enough

1CAMWNDR

iTrader: (21)

Thanks guys. I will see about locating some Kendal gear oil in the next couple weeks.
Ryan, do you know of anyone in Tallahassee that has a stock to 1350 conversion U-joint? None of the NAPA stores had a clue what I was talking about.

ChevyGoldfinger

What kind of Diff are you running? I would really like to use synthetic in my 9" Moser with the Detroit Locker, but I think they advise against it. Sure would make it run cooler. Anyone know if all the mfgs. still insist on Dino gear oil for the Detroit Locker?

Scott@DrivelineSolutions

iTrader: (22)

After break-in I wouldn't worry about changing over to synthetic.

ChevyGoldfinger

Really? What would you suggest for a 9" with a full on Detroit Locker? (not a "soft locker")

Would you go with:
Amsoil, Redline, Royal Purple, or other?

Which weight? (I live in the desert where 170* track temps are not uncommon in the summertime)

SAE 75W-90 Synthetic Gear Lube

SAE 80W-90 Synthetic Gear Lube

SAE 85W-140 Synthetic Gear Lube

Thanks for any suggestions.

JRracing

iTrader: (35)

The stock to 1350 U joint, you can pick up at AUTO ZONE I hear. Thats very common.

CTSmechanic

iTrader: (2)

A Detroit locker is not a friction type differental the type of oil you use shouldnt matter, I run nothing but mobil one 75-90 for drag racing a oil with a thicker film strength isnt a bad idea i.e 80-140 I have seen some of the Red Line "shock proof" used with sucess

ChevyGoldfinger

Hey Harley! How's it going?

I guess the best thing to do is give Dan a call and see what he recommends these days. The 9" was installed at Adam's but last time I was there that kid seemed clueless. I guess Rusty left for Montana or somewhere.

They put dino 80 w 140 in it when Rusty was there a couple of years ago. Not sure what others are using, but it makes sense to me to use the synthetic if it won't do any harm. The benefits in this heat are obvious. Also, there might not be as much parasitic power loss with the syn.

What do you guys use in those race trucks?

CTSmechanic

iTrader: (2)

Hey John... We run 75 90 or 85-140 Mobil One... just depends on the track..

Tally TransAm

iTrader: (17)

na all the napa guys here are retards

if you dont have a part number they have no idea what you are talking about

1CAMWNDR

iTrader: (21)

I will check with some of the Autozone stores around here. I am going to have a 31 spline Detroit Locker and will use 80W 90 Dino oil for the breakin and then might switch to a 80W 90 Synthetic.

Pro Stock John

iTrader: (34)

I run regular 85/140 and my 9" takes less than two full quarts. I fill it till it dribbles out the side fill.

ChevyGoldfinger

Hey John, that's what the shop that installed mine put in it as well. I wonder if the high quality synthetic gear oil would harm these 9"/Detroit Locker diifs? Have you ever asked around about it?

BTW. . . congrats on the new time man! Great job for the first time out. It'll probably go better when it cools down this fall.

Mr_president

iTrader: (38)

i ran redline synthetic and 3 months later blew the pinion bearings , might now be the cause but might have been!?!