In the manual 6th gen Corollas, is the transfer case and the manual transmission continuous with each other or are they separate compartments?
What about the automatic Corollas?
The reason I ask is that my shop manual says to check the dipstick for the automatic transfer, but makes no mention of their being a dipstick for the manual transfer. And I've never found any dipstick for the manual transfer case; in all these years, I've never needed to change the transfer gear oil, but I am considering doing so. (I have a manual stick shift Corolla).
The shop repair manual (Toyota published) says that I should use either SAE 90, 80W-90, or 75W-90 gear oil, which I assume must mean dino gear oil and not synthetic. Can synthetic gear oil be used, and if so, can you recommend a good brand? e.g. Mobil 1, Amsoil, Redline, Royal Purple, etc.
Transfer case? Do you nean differential?
If you are talking about the diff, yes they are continuous.
For the manual, you have to pull the fill plug, and fill till it overflows, or stick a q-tip inside it to check for the level.
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'88 Corolla, AE92 SR-5, 7A-FE swap/GT-S suspension
'87 Corolla, AE82 FX-16, 4A-GZE swap (autocrosser)
'03 Tundra 4X4 Access Cab, (FX tow vehicle/Home Depot runner)
Modification: Changing something to what you thought it should have been from the start!
Automatic trannies require tranny fluid to automatically shift. However, that same trans fluid cannot serve the require lubri purpose for the diff so they're separate from one another. On the other hand, manual trannies is all one whole since all it is are moving parts, not anything that engages by itself like an automatic.
Transfer case? Do you nean differential?
If you are talking about the diff, yes they are continuous.
For the manual, you have to pull the fill plug, and fill till it overflows, or stick a q-tip inside it to check for the level.
Yes, according to my shop manual, the transfer contains the rear and center differential.
Here is a top view schematic diagram of this:
The transfer is at the very bottom, above it is the front and center differential housing (horizontal), and above and the left of these is the manual transaxle housing. It looks like the manual transaxle housing is continuous with the front/center differential, so any gear oil put there goes into the differential as well.
However, I also see a filler plug on top of the transfer, and there is a drain plug on the transfer too.
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1988 Corolla SR5 AE95
Last edited by datsa; 06-05-2009 at 06:01 AM.
Reason: more added comments
Automatic trannies require tranny fluid to automatically shift. However, that same trans fluid cannot serve the require lubri purpose for the diff so they're separate from one another. On the other hand, manual trannies is all one whole since all it is are moving parts, not anything that engages by itself like an automatic.
I use Mobil1 75W-90 Synthetic Gear Oil.
Thanks for the info and explaining the difference.
And thanks for the tip on the gear oil. I bought a bottle of Amsoil 75W-90. Expensive. Ouch!
Especially since I'll need 5.3 quarts just for the front differential, and 1.2 quarts for the rear.
I'll try Mobil 1 synthetic.
Yes, according to my shop manual, the transfer contains the rear and center differential.
Here is a top view schematic diagram of this:
The transfer is at the very bottom, above it is the front and center differential housing (horizontal), and above and the left of these is the manual transaxle housing. It looks like the manual transaxle housing is continuous with the front/center differential, so any gear oil put there goes into the differential as well.
However, I also see a filler plug on top of the transfer, and there is a drain plug on the transfer too.
correction, the transfer case contain the front and center differential
Automatic trannies require tranny fluid to automatically shift. However, that same trans fluid cannot serve the require lubri purpose for the diff so they're separate from one another.
No, that's wrong. Both the 3-speed and 4-speed automatics used in the 6th gen use Dexron II
ATF for BOTH the torque converter and the differential. The A131L (3-speed non-electronic)
automatic transmission has a separate reservoir for the differential, but it's filled with ATF.
The 4-speed is all one tank, filled at the dipstick for both torque converter and differential.
Can someone explain how to get to the transfer case fill plug? I can see what may be the fill plug that has an allen wrench hex in it but it lays right underneath the clutch cable.(5 speed manual trans) I could barely get my hand to touch it. Do you have to remove the airbox to access the filler plug? thanks for any information.
Wtf?? I've never seen any differential take 5 quarts of gear oil. What do you have, a monster truck? haha The 1.2 in the back sounds right though.
Yes, according to both my owners manual and the shop manual, the front and center differential with transfer takes 5.3 quarts. The rear takes 1.2 quarts. I pulled out the propeller shaft and replaced the seal, and did lose some gear oil which I replaced with a bit of new gear oil. I am running Auto-Rx treatment in both differentials, then I'll drain them completely and refill with Mobil-One.
Can someone explain how to get to the transfer case fill plug? I can see what may be the fill plug that has an allen wrench hex in it but it lays right underneath the clutch cable.(5 speed manual trans) I could barely get my hand to touch it. Do you have to remove the airbox to access the filler plug? thanks for any information.
The best way to get to the transmission filler plug is to:
1) Jack up the front of the car as high as possible; I put mine on blocks and chocked the rear wheels to prevent roll-back.
2) Remove the left-hand-side under cover that protects the lower end of the radiator and part of the transmission.
3) With a 24mm socket attached to a long breaker bar or ratchet, unscrew counterclockwise the hex-shaped filler bolt. Note: This bolt is torqued so tight that I had to put a 18" piece of pipe on the end of the breaker bar to get enough torque to undo the filler plug bolt.
4) With your pinky finger gingerly reach into the filler hole and check the level of transmission fluid. Why your pinky finger? Because the filler hole is too small for most people's index finger (unless you have really skinny fingers).
5) If the level is not up to the filler hole, add sufficient gear oil so that it "runs out of the filler hole." (I am quoting from my Toyota shop manual).
6) Rescrew on the filler plug securely (you may want to get another new gasket, but I found that you can just clean off the gasket and re-use it).
7) Re-attach the left-hand-side plastic undercover.
8) Lower the car to the ground, and remove the chocks behind the rear wheels.
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