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Old 04-02-2008, 11:04 PM   #1
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3 or 4 speed?

99 2.5L TJ auto, do I have a 3 or 4 speed tranny?

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Old 04-02-2008, 11:07 PM   #2
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3-speed : 30RH

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Old 04-02-2008, 11:33 PM   #3
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yup, 3 speed... got the short end of that stick lol I think it 02 ws the last 3 speed auto they made.
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Old 04-03-2008, 12:11 AM   #4
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Thats what I thought, I just hear what sounds like 4 shifts, and my rpm goes down 4x
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Old 04-03-2008, 12:12 AM   #5
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thats ur OD kicking in.
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Old 04-03-2008, 12:27 AM   #6
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No its not - its the torque converter locking up.
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Old 04-03-2008, 12:30 AM   #7
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yea you have the 3 speed. its a descent tranny, its held up to my flogging no problem so far.
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Old 04-03-2008, 12:32 AM   #8
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Rawkon - you and I have a 32RH, not a 30RH.... unless your X model has a 4cyl.
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Old 04-03-2008, 01:03 AM   #9
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Heres how it goes, goes through 1st and 2nd gear. Then rides 3rd up to the desired speed, then if I let off the pedal at all it will drop down to 1900 to 2300 rpm from about 3k rpm in 3rd. Is that od? I didn't know I had od.
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Old 04-03-2008, 01:16 AM   #10
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Its not over drive, its the torque converter locking up. That is two different things.
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Old 04-03-2008, 01:25 AM   #11
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Its not over drive, its the torque converter locking up. That is two different things.
Can you explain how that works? I thought it locked up when you reved too high, like 3 days ago when I accidently hit 5.6k rpm and it hit the rev limiter.
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Old 04-03-2008, 01:45 AM   #12
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The impeller in the torque converter rotates and pushes fluid through the tranny which causes the clutch packs to engage. When you accelerate if pushes fluid and the first set of clutches engage and it shifts, and repeats into 3rd gear. When you are cruising on the highway the torque converter itself locks so as to make a 1:1 ratio between the output of the motor and the input of the transmission which makes it easier on the tranny and creates less heat and a somewhat better fuel economy.
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Old 04-03-2008, 01:47 AM   #13
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Quote:
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Rawkon - you and I have a 32RH, not a 30RH.... unless your X model has a 4cyl.
X models came stock with the I6. 4 bangers where never in the X
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Old 04-03-2008, 04:55 AM   #14
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My X has a I6, but i thought it was an option.
Thanks for the info!!
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Old 04-03-2008, 05:40 AM   #15
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The impeller in the torque converter rotates and pushes fluid through the tranny which causes the clutch packs to engage. When you accelerate if pushes fluid and the first set of clutches engage and it shifts, and repeats into 3rd gear. When you are cruising on the highway the torque converter itself locks so as to make a 1:1 ratio between the output of the motor and the input of the transmission which makes it easier on the tranny and creates less heat and a somewhat better fuel economy.


tobycat1, think of it like this. You got 2 fans and some fluid, both attached to a shaft. The one fan is spun by the engine, which spins the fluid. The fluid spins the other fan, which is connected to a shaft that goes to your transmission. As you drive, those fans get closer together, until you get to 3rd gear and are cruising. While you are cruising, the fins attached together, so that you keep the heat down, and don't waste as much energy to spin the trans. as soon as you hit the gas hard enough, or the brake, the unlock and start spinning VIA the fluid again, so you don't stall the motor when you come to a stop

this drops your RPMs when it locks up, because it takes more power to spin the transmission internals VIA fluid, than to spin the transmission with (esentially) the crankshaft of the engine.


always good to know how your junk works, and this is a fairly easy link with good pics
http://auto.howstuffworks.com/torque-converter.htm
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Old 04-03-2008, 09:01 AM   #16
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Thanks AzTJ, and JCS05Rubi. I think I understand it now. off to school

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