Doing a tune up

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Jul 31, 2011 | 09:32 PM

#11

1989-FORD-F150

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From: Bullitt County, Kentucky

Quote:

Originally Posted by qdeezie

If you're a Castrol man, go with Castrol Syntec 75w-90.

Im about to change the the oil in my differential and was thinking of going with Lucas synthetic gear oil or the castrol syntec that you recommended any thoughts? And I have a limited slip do I need to put any additives in there?

Jul 31, 2011 | 09:42 PM

#12

95EddBau

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Joined: Nov 2008

Posts: 53

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From: Temple PA

yeah there is a limited slip diff additive you need to put in then find an open parking lot and drive in some figure 8s to work the fluid into the clutches in the diff and both fluids are good

Jul 31, 2011 | 10:08 PM

#13

BrianH

5 Year Member

Joined: Oct 2010

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From: Sincy, Oh.

Valvoline Is the best WEED KILLER you could find!!!, if your going to use any synth, oil you should go with the Modil1 or Pennzoilsynth.

Jul 31, 2011 | 10:35 PM

#14

qdeezie

5 Year Member

Joined: Oct 2010

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From: Charlotte, NC

Quote:

Originally Posted by 1989-FORD-F150

Some synthetics don't require the LSD additive. Read the bottle to see if the additive is necessary. In some instances, the bottle will say that the additive is not necessary, but you still may have to add the additive if you experience some chatter. As the previous poster mentioned, the figure 8 is a good way to slosh it around after the fill.

Personally, I use Amsoil Severe Gear 75w-90 gear oil, but I'm sure the two brands you're considering are up to the task.

If I had to personally choose between the two, I'd go with the Castrol. Lucas makes good stuff, but I'm more comfortable with using Lucas additives more so than their actual component fluids.

Jul 31, 2011 | 10:44 PM

#15

1989-FORD-F150

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From: Bullitt County, Kentucky

Quote:

Originally Posted by qdeezie

Personally, I use Amsoil Severe Gear 75w-90 gear oil, but I'm sure the two brands you're considering are up to the task..

How much is that a quart?

Jul 31, 2011 | 10:55 PM

#16

1989-FORD-F150

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From: Bullitt County, Kentucky

Also what is best to use in your tranny?

Aug 1, 2011 | 01:33 AM

#17

|SkidRow|

Thread Starter

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Joined: May 2011

Posts: 653

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From: Northern BC, Canada

Quote:

Originally Posted by Just call me Sean

Champion? It's not a lawn mower man.

Sidewall.

The plugs are still in the boxes

and I have the receipt :P (I guess I'll return them on my way back for other things) Any suggestions for plugs? Remember, I am in Canada, so some items might not be available up here.

I will be doing both changes on Sunday and may change the plugs and coolant later in the day.

I'm interested in hearing about the oil for the tranny as well. I have a 5 speed Mazda.

Aug 1, 2011 | 01:42 AM

#18

Just call me Sean

We'd do it

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From: Orlando,Fl.

I use Motorcraft for my plugs, I don't recall what the next best is when Motorcraft isn't available.

Aug 1, 2011 | 02:36 AM

#19

ndnJedi

Jesse

Joined: Apr 2011

Posts: 3,868

Likes: 6

From: Vancouver, BC, Canada

Canadian Tires around here in Metro Vancouver carry Autolite Copper plugs, IIRC those are the next best always mentioned on here. My truck came with Champions Copper, they're doin OK, my 87 bronco I had always ran Motorcraft Copper and ran way better. I reset the gap to proper spec as listed on that hood sticker. Both the Bronco and my current F150 have a 302.

Aug 1, 2011 | 02:44 AM

#20

Warlockk

Senior Member

Joined: Aug 2010

Posts: 2,669

Likes: 116

From: Long Beach, CA

Quote:

Originally Posted by |SkidRow|

I'm going with Castrol GTX High Mileage on Sunday(Next Sunday) and was wondering what type of Synthetic to go in the rear end? I don't want to go with Synthetic Motor Oil until I have a more stable income so I can change the seals or have them changed if they do develop a leak after the switch. I have some of the other things, plugs (Champion Copper's, STP 50/50 Mix Coolant, GTX Oil (10W-30) and the wires will be bought on Friday).

I have Wild Country XTX Sport tires(Stock LT235/75/R15) and I was wondering if I should have them aired up to 50PSI, or keep them at 40PSI? Sidewall says 50 and the door jam say 41 in the rear and 35 in the front. Sidewall or door jam?!

Edit: I have Axel Code 19, so that's 3.55 gears, if that helps on the gear oil decision.

Gear oil and auto trans I use Royal Purple. You don't change the fluid all that often in those areas so its worth spending a little more. No LSD modifier is needed and it is full synthetic. It flows well at low temps and still outlasts conventional at high temp and is shock and foam resistant. For the tires its a matter of taste. Lower air gives a softer ride. Higher pressure makes for lower rolling resistance so you may see more mph. The stiffer sidewall helps in corners and may give a longer tread life, but makes a harsher ride and more wear on your suspension. Whatever you decide don't go under Ford's specs or over the sidewall numbers. I run mostly on the freeway so I keep it a few pounds under the sidewall.

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