Trans 1985 4.2 Laredo CJ7 T5 Manual Transmission Oil
Trans 1985 4.2 Laredo CJ7 T5 Manual Transmission Oil
- Thread starter hoods5
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CJ
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You can read the debates on this until your eyes bleed.
What I know and have used. GL4 is specific for a syncro trans but a low sulfate GL5 such as Valvoline will work. You and I are in FL so cold weather is probably not a big issue
so synthetic is not a must have. 75w90 GL4 is fine for FL. 75w90 in cold weather can make it slightly more difficult to shift. Do not use any ATF.
What I know and have used. GL4 is specific for a syncro trans but a low sulfate GL5 such as Valvoline will work. You and I are in FL so cold weather is probably not a big issue
so synthetic is not a must have. 75w90 GL4 is fine for FL. 75w90 in cold weather can make it slightly more difficult to shift. Do not use any ATF.
hole
Crazy Sr. Respected Jeeper
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I ditched the T5 years ago, but I was running 75/90 GL4/5 and it would grind the 3/4 shift. Synchromesh eliminated that until I pulled it in favor of a T19.
hoods5
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So does synchromesh have a stated weight to it or is it all the same weight? Is it al 75W 90 or are there different weights? I don't see any weights listed on any of the synchromesh bottles that I've seen online.
CJ
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A syncromesh is the brass toothed ring between the gears in the transmission that are designed to equalize the speed of the gears while shifting so they do not grind. It is not in the oil. It's the additives in the oil that make it specific for synchronized transmissions, GL4. 75w90 is the viscosity of the oil. 75w when cool and 90w when at temp.
The syncromesh bottles are an addictives for standard 75w90 oil so it turns into the oil type you require when mixed.
Long story, short, just buy 75w90 GL4 oil.
hole
Crazy Sr. Respected Jeeper
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I'm not sure of the additive CJ is speaking of, but the product I used was intended to be used straight out the the bottle. I dont remember what brand (Valvaline, Penzoil,etc ) nor do I remember if it came in different weights. Just look for Synchromesh for manual transmissions, I dont think brand will matter.
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w does not mean weight. w means winter
CJ
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Same thing you are, just do not add it if the oil is already GL4/5 rated.