View Poll Results: Gear Oil Weight for Stock 10 Bolt?
75W90
81
64.29%
75W140
45
35.71%
Voters: 126. You may not vote on this poll
Gear Oil Weight Poll
09-07-2007, 02:47 PM
#4
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Right now I have the Lucas mineral based 85W-140. This stuff is as thick as jelly!! 
Before the winter I plan on changing to a Torco RGO mix of 1 qt. of 85W-140 & 1 qt. of 80W-90.
Before the winter I plan on changing to a Torco RGO mix of 1 qt. of 85W-140 & 1 qt. of 80W-90. 
09-08-2007, 09:40 AM
#6
Depends on what type of differential you have in there...since I run an Eaton in my Strange 12-bolt, I have to use a non-synthetic gear oil...otherwise, the clutch packs will be hating life and won't work right. If you still have a torsen type of differential, then you are fine using the synthetic, and I think the 140 weight would be a good step in the right direction. I wouldn't expect it to dramatically incrase your rear's life though if you are still on a 10-bolt...
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10-24-2007, 11:51 AM
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3 quarts Wolf's Head 80W-90 mineral oil in my 8 second drag radial car. 1.36 60' times with the rear tires off of a trans brake.
10-24-2007, 01:13 PM
#14
10-24-2007, 05:45 PM
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x2 on the Ford XL-3 additive. It's even less $$ than the Delco stuff! (But DAYUM is that some of the most putrid, pungent, persistant stink I've EVER had the displeasure to smell! 
)
It gets too cold here in the winter, so I mixed the RGO weights 1/2 80W-90, 1/2 85W-140. It would be cool if Torco or Schaeffers would come out with an "in between" weight in a mineral based gear oil (like Amsoil's synthetic 75W-110). This is what I was trying to accomplish with the mix.
)It gets too cold here in the winter, so I mixed the RGO weights 1/2 80W-90, 1/2 85W-140. It would be cool if Torco or Schaeffers would come out with an "in between" weight in a mineral based gear oil (like Amsoil's synthetic 75W-110). This is what I was trying to accomplish with the mix.
10-25-2007, 05:20 PM
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You can, but most of those in the know will tell you don't. You MOST CERTAINLY DO NOT "need to" use synthetic gear oil, and like I said most will tell you to use a good, heavy mineral based gear oil in a 9". IF you feel you must use synthetic, make sure you use a heavier weight (75W-140) from Torco, Amsoil, Neo, etc. As far as I know, you do NOT need the friction modifier with the TrueTrac, but I would contact Eaton/Detroit and ask their techs what they suggest (and tell them ALL of your mods/applications/how you plan on using the car, etc.).
10-25-2007, 05:22 PM
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the thing is i i get a little bit of inner wheel hop on sharp slow turns, like leaving a parting spot, or after i come to a stop sign
if i turn right the right wheel hops a lil bit
if i turn left the left wheel hops a lil bit.
that normal for the truetrack. i was thinking it might have been from the type of fluid
if i turn right the right wheel hops a lil bit
if i turn left the left wheel hops a lil bit.
that normal for the truetrack. i was thinking it might have been from the type of fluid