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  #1  
Old 02-16-2010, 09:23 PM
hpfreak08 hpfreak08 is offline
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Thumbs down questions about torque converter

i have an 06 ranger with a 3.0 and a auto with 4.10 gearing and it dosent seem to have much take off.. like i can let off the brake and doesnt really take off until i gas it.. my grandpa recently got him one too but i drove his and soon as you let off the brake it flys lol.. so i was wondering if my torque converter has suffered some damage so far in its life or if it has a higher stall speed or if it may just be a tranny pressure soleniod or torque converter lock up soliniod goin bad... ??? any answers will help greatly.. thanks
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Old 02-19-2010, 08:37 AM
larrysfixit larrysfixit is offline
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My Ranger (I just bought) has 145K miles and I was thinking the same thing. Also when driving it seems to want to kick down from overdrive pretty easy (early). I tried the torque converter slip test [Hold the brake and press the excelerator to see if it slipps or stalls] it does not slip but it does get to 3000 RPM before it locks in hard. I changer the fluid and filter but it did not change. Also my fluid was not burnt
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Old 02-19-2010, 06:32 PM
Areyouforcereal? Areyouforcereal? is offline
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I would not recomend the stall test unless you have a temp gauge for your tranny, and know what the proper stall speed for the truck is. When doing a stall test the tranny gets very hot very quick. Never Stall it for longer than 30 sec. , and put it neutral and rev the engine a little for about a min. or two, to cool it down. Also don't stall it in reverse. Stall testing is good to help diagnose a torque converter problem, but only if done right, and you know what the stall speed for the particular vehicle should be. If done wrong it can cause a lot of damage.
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Old 02-20-2010, 08:43 AM
larrysfixit larrysfixit is offline
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Yes that true. The correct speed for a 4R44E trans on a 3.0 eng is 2833-3384 RPM. so around 3000Rpm should be good. I never thought a bout a check in reverse. What does that do different than in forward?
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Old 02-20-2010, 04:51 PM
Areyouforcereal? Areyouforcereal? is offline
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In rev. you have the potential of breaking drivetrain componets. Rev. is typically the lowest gear ratio, combining the the engine tq, converter ratio, rev. ratio, and the rear end ratio, will add up to a lot more torque being sent to the wheels than expected. I worked as a heavy duty trans. mech. specializing in Allisons, and have seen someone break a ring gear in the rear end of an RV, by stall testing in Rev. It's kinda crazy to see a 15" ring gear break into 3 pieces. We figured the actual amount of torque being sent to the rear wheels and it was some crazy ungodly amount. The Rv had a detroit 60 series in it, and an HT 750 tranny.
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