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545RFE Questions on how it should shift.

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Old Nov 7, 2011 | 06:54 AM
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Default 545RFE Questions on how it should shift.

So I have the Superchips 3865 with the trans tunning. I've read that when the truck is cold, she will shift according to the stock shift pattern. After I romped on her for a while with the Superchips trans tunning, and I start driving normal again, if I accelerate normally at around 30-40 mph the trans will shift up and down a couple of times until I get past 40mph. I just put the stock trans tune (boring) with the 87 octane this morning. I don't know if this is normal, but when driving around the same speed 30-40 under light acceleration the truck gently downshifts before going into the next gear. Is that normal?

I guessing I might need a fluid exchange but the truck only has 43,000 right now. I've only towed once, so I don't think that is it. I just know these transmissions are pickey. I have a trans cooler that I want to install, but I just moved into an apartment so I would need to find a reputable shop to install the cooler and do a low pressure flush. Anyone know of anyone in the Tampa area?

Has anyone heard of the shifting issues I have? Is Aamco a decent place to get a service done? Can someone provide me with a link to purchase the filters for a 2006 Raider 4x4?

Thanks in advance!
 

Last edited by Cuban11182; Nov 7, 2011 at 06:57 AM.
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Old Nov 7, 2011 | 08:57 AM
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My truck shifts according to my schedule hot or cold. Not sure if this helps you or not. Aamco did my trans (fluid/filter change) for @$100. Make sure whoever it is to use OEM filters.
 
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Old Nov 7, 2011 | 09:43 AM
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Yea I was planning on either brininging the filters in, or ensuring they use OEM ones.

I've heard these transmissions can get pickey if you don't change the fluid and filters often. I think I'm going to head by Aamco after work and get a quote from them. I also know I supposed to request a low pressure fluid exchange as opposed to using the machine.
 

Last edited by Cuban11182; Nov 7, 2011 at 09:46 AM.
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Old Nov 7, 2011 | 11:05 AM
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I am pretty sure if the truck is cold cold, it will hold a lower gear longer (say no overdrive) until it reaches operating temps, which isn't long. But I am not sure about your situation... mine shifts like stock just faster and more efficiently...
 
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Old Nov 15, 2011 | 05:48 PM
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I just put on a PML trans pan. All aliminum with fins, and it holds more fluid as well. Ive noticed that my truck shifts funny to. I dont have a tuner on my set up though. When in tow haul mode, what is the tranny doing? Once I hit 30 mph it seems like it goes into 4th gear really early, even when pulling a load. The rpm drops down to 1500. With tow haul mode off I dont get a rpm drop until 40-45mph, 5th gear being the OD i guess.
 
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Old Nov 15, 2011 | 09:24 PM
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stock, these trucks are programmed to get to overdrive as soon as possible. so unless you are at WOT, the truck will be in 5th gear (od) at 25 mph. Not sure what the tow/haul button does. On mine, it makes the truck shift wayyyy funny...so much I think it is slipping...I never use it.
 
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Old Nov 15, 2011 | 10:19 PM
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tow/haul just keeps it out of top gear. for me od/0ff = 3rd if anything it should prevent it from shifting more.

when im on the highway before i pass someone i click od/off so it downshifts to 3rd then i go WOT and depending on speed it will go to 2nd prime or keep in 3rd. the 4-2prim double downshift kills the 45rfe so i prevent it by shifting myself.
 

Last edited by thunder98110; Nov 15, 2011 at 10:28 PM.
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Old Nov 15, 2011 | 10:26 PM
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Originally Posted by thunder98110
tow/haul just keeps it out of top gear. for me od/0ff = 3rd
see, thats a difference...some trucks , the button is od on/off, others it is tow/haul....on mine it is tow/haul and it does not turn off od. it does not get "rid" of a gear....
 
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Old Nov 15, 2011 | 10:30 PM
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ohhhh, i figured od/off and towhaul was the same deal? someone care to explain? i mean thats what the od.off button is for.
 
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Old Nov 15, 2011 | 10:35 PM
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I read on here once that the dealer (via starscan) can change the button from od on/off to tow/haul and vice-versa...but for a cost (obviously)...so not sure what each mode does....I know on mine, it makes the trans do funky ****, so I never use it...I've had other makes (furd, shivy) where the tow/haul actually does something positive, but not on my truck...i'd like to know if others have different experiences...
 
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