Originally Posted by Mike Romain
The T5 in the Jeep is more related to the T176 because they both use gear oil and both have bronze syncros that get killed by the sulfur I believe it is in gear oils with the GL5 rating.
The 'World Class' T5 in the Mustang needs thinner fluid like ATF because it uses nylon syncromesh.
ealier non world class t5's have fiber bonded to steel syncos in the lowers gears and a bronze in 3r,4th and 5th i beleive..the 1985-89 world class has fiber lined syncross in 1234,and bronze only in fith..the 90-93 has a carbon fiber lined synro assembly in some gears and then bronze in others..
the big difference in the needle bearings under the lower gears on the mainshaft..they need the thinner oil..
the jeep or non world class calls for gl5 wich do not have the needle bearings..
dug this up just for the year clarification..http://www.allfordmustangs.com/Detailed/349.shtml
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1984 cj8 350 on 35's..the wifes
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