Need Power Steering and Brake Fluid recommendations

Bill W

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I want to change the power steering fluid and clutch/brake fluid. What is best and how much will I need?
Also doing the rear with Mopar 68218657AA 75w140 plus Mopar 4318060AB Limited Slip Additive.

 
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Joule

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Did a full fluid wipe on my gen 2 about 6 months back myself. After reading a bunch of forums that spanned over 2 decades and countless opinions, I just decided to go with the following:

Engine Oil - Mobil1 Extended Performance 10W-30 [10 qts]
Trans Fluid - Castrol Transmax Dexron VI [4 qts]
Diff Fluid - Valvoline 75W-140 w/ LS additive [45 oz]
Coolant - PEAK Gold 50/50 [12.8 qts]
Brake Fluid - Prestone DOT 4 [7.5 oz]
Power Steering Fluid - Prestone [21 oz]

Not sure if these are the best per se, but so far 4,000 miles later, they haven't given me any trouble. Then again I drive pretty tamely, as it is my daily driver, but have had no problems making 3 roundtrips from SD to Phoenix and back.
 

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GTS Dean

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Valvoline power steering fluid meets the Chrysler spec. White bottle, blue label. They also offer a full synthetic option in a black bottle with silver labeling. It is a golden colored oil like OE, not a red ATF+4.

If you never track your Viper, then any quality DOT 3 or 4 brake fluid will perform without issues in your car. I annually replace my brake fluid with a racing formulation. If I ever feel the slightest hint of soft pedal, I bleed/add again. It requires less than 1 pint for a full change. I've only changed clutch fluid about every 7-8 years with a lot of track use.
 
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Goggles Pizano

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@Joule the trans fluid is very, very questionable and 100% I would not use what you used. There is a sticker on the tranny that states DexIII or the synctorq (too lazy to look it up). DexVI shouldn't really be used.
 

lane_viper

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You're probably going to get a lot of different opinions. So get ready for it. Opinions are like buttholes, everyone has one.

He's what I'm running in 5 years of ownership:

Oil - Mobile 1 0-40 - recommended weight in new Vipers, and IMO the best fit in the older guys as well. I like the additives in it as well.
Diff - Mobile 1 75W-140, I also added the LS modifier
Trans - Pennzoil Syncromesh - I know it calls for Dex III, but I lost 5th and 6th gear and did a rebuild on the Viper and Vette. Both are running Syncromesh now. I have seen no ill affects and have done some research on it
Coolant - Haters going to come after me on this. I run Dexcool in the Viper. I think its very similar to Mopar Orange, and have done a proper flush of the green before, after 5 years and every other year changes, Car is great. Did some research and I'm prob not the only one running Dexcool.
Brake Fluid/Clutch - Prestone DOT 4
Power Steering - Royal purple synth
 

daveg

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Only change I would make is in the Tranny, I run
Castrol Transmax DEX/MERC (have a 96 GTS) Trans fluid, meets the Dextron III Standard. I use to run the gear oil but shifting effort Definity increased when cold and the Dex III shifts much better.

Check out post
 
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lane_viper

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@lane_viper tranny rebuild doesn't count as I would guess it uses new carbon blockers material.
You are prob right as I am pretty sure both of my T56's have carbon blockers. I know the early Vettes and Vipers had some paper?

I have heard to definitely do not run synthetic fluid in cars with paper blockers, but I could be wrong.

Either way I have 80k on the Vette's rebuild due to 2nd gear syncro with Synchromesh and have no perceived issues. I'm running it in both.
 

daveg

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In 1999 the rings were supposedly changed from paper lined to carbon fiber. Because of this I would run Dex III in anything less than 99. Would not risk anything synthetic with Paper.
 

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