Need help QUICK - About 98 Rear-end

[topless98gt]

Does the stock 98 GT rear end take synthetic fluid?! I went to get it topped off at a lube shop and the guy said that 96 and up take synthetic.

 

[topless98gt]

Anyone? I need to know before all of the mechanic shops close. I have to get this done today...

 

[squares98]

Synthetic or Not does not matter. I personally use Redline(synthetic), but others will recommend Royal Purple or Mobil 1 as well. They are good. Or you can use Motorcraft Oil and Friction Modifier.

 

[XtorT'r]

You will probably have an easier time finding Mobile 1 and use the friction modifier. While your at it just replace all the fluid. The stuff stinks bad though.

 

[Kilgore Trout]

Motorcraft 75W-140 Synthetic plus 4oz friction modifier.

 

[speedfreak98r]

Just put some pancake syrup in there.

 

[Mike97gt]

the 98's came with non-synth fromt he factory. .but you can use synth if you want.. remember you need friction modifier.

 

[DTNODYA]

I didn't use synthetic ... just regular 80W-90 ( I think ) and 4 oz. friction modifier. *Warning* Friction Modifier is the worst smelling **** known to man!!

 

[Tally_4.6]

I didn't use synthetic ... just regular 80W-90 ( I think ) and 4 oz. friction modifier. *Warning* Friction Modifier is the worst smelling **** known to man!!

Same here, 80-90w with Ford friction mod. That **** is the worst smell ever, i'm around gear oil everyday and it almost makes me vomit, once i get it on my work clothes it doesn't go away.

 

[topless98gt]

thanks guys, i just took the bike instead. i am going to mexico in 24 hours

 

[exindust]

hooker time

 

[topless98gt]

So do I get synthetic or not?

 

[topless98gt]

75W-140 Synthetic is $18/quart
80W-90 is $4/quart
Friction modifier is $6/bottle

Sound about right?

 

[Kilgore Trout]

You should be fine with 80-90, those prices are good.

 

[Pennywise2]

75W-140 Synthetic is $18/quart
80W-90 is $4/quart
Friction modifier is $6/bottle

Sound about right?

You don't need to use Synthetic gear oil but,it will last longer though.
In my 96 I use Royal Purple 75W90 gear oil everytime it needs to be
changed.

 

[03ghoststang]

i use the Royal Purple synthetic gear oil that comes with teh friction modifier in it which is 75W-90