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Old 10-19-2013, 12:00 PM   #1
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V6 3.8 auto trans problem

I have an '01 that I put a used Tranny in when I completely lost every gear except 1st. when we swaped the trans I had to also take the old speed sensor off of my old trans and put it on the new one. I now have all my gears but from first to second gear my rpms lag at 2 grand and then seems like it downshifts to get up to speed. I drive it OverDrive and it works better. I also cant go any faster then 90 on the highway. I was able to go 120 before the swap.
The paper work i got with the tranny from a junk yard says it came out of an 02 does that change anything?

also was wondering what the SGS button is. I was testing it out and i started to smell a burning smell so i turned it off and it stopped smelling.
HELP:dun no:

#Girlprobs
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Old 10-19-2013, 12:15 PM   #2
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SGS stand for "second gear start". When this button is activated the car will start out in second gear instead of first, for easier start-off in inclement weather. As far as the lag shift goes, how many miles are on that used replacement trans? My guess it has its own issues being a used trans. Should have rebuilt yours, and no, that trans being an 02 doesn't matter.
Make sure the trans fluid is full.
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Old 10-19-2013, 12:19 PM   #3
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That was what i was afraid of. 134k my car has 127k I wish i had 1500$ to rebuild. would that include the 90mph?

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Old 10-19-2013, 12:30 PM   #4
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90 mph is a bit excessive isn't it? Not sure why it would be limited to 90mph tho, not being before. Unless you aren't getting all gears from the trans.
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Old 10-19-2013, 12:37 PM   #5
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Quote:
Originally Posted by Camarogirl2001 View Post
...would that include the 90mph?
You may have a bad wheel speed sensor, bad ABS, or unplugged/bad VSS....are you throwing any codes?

On some Cadillac's that I work on, the computer limits the speed of the vehicle to 90mph when it can't read the wheel speed sensor or the computer can't pick up the speed of the vehicle...
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Old 10-19-2013, 12:41 PM   #6
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My next step is to code it. ill get back to you about what the results are thank you guys!!! do i just go to autozone and code it for free? do they code just the trans?
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Old 10-19-2013, 12:49 PM   #7
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If the SES light Is on, it's throwing a code(s). Yes, AutoZone will check the codes for u for free.
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Old 10-19-2013, 03:05 PM   #8
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SES light is not on. I got some codes. p1870- Internal trans fault. Transmission is in 4th gear with TCC engaged and the ECM has detected excessive slippage when comparing the input shaft speed to the output shaft speed. I do have a year warrenty on my trans....

The second one i got was P0420 The oxygen sensors monitor the catalytic converter's ability to store oxygen. Causes- 1. catalytic converter defective (failure possibly due to #2,3 or 4) 2. engine misfire or running condition. 3.large vacuum leak 4. engine oil leakage into exhaust-valve guide seals, piston rings

The third one I got was P0443 solenoids and system wiring are monitored for opens or shorts. causes- 1.purge or vent solenoids defective. 2. connector or wiring 3. Fuel saturated vapor canister. 4. failed evap vent solenoid.


ENGLISH PLEASE!
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Old 10-20-2013, 12:36 AM   #9
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If you have a warranty, get it repaired/replaced. The P0420 means you either need to replace your catalytic converter or the 02 sensor after it. P0433 is usually the evap solenoid.
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Old 10-20-2013, 01:29 PM   #10
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With the slipping trans it sounds like either low fluid, maladjusted bands, a bad filter, or a bad servo...fluid is the place I'd start followed by the filter...

Was the trans opened at all before install, or was it just swapped out?
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Old 10-23-2013, 03:35 PM   #11
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It was swapped out. I got it online and picked it up at a junk yard. I have a warranty on the trans. This is just really hard because
its my only vehicle. the fluid and filter were changed when we put in the trans (wyo tech grad and personal shop) Im thinkin its something internal. I just need it to run as long as it can so i can save money for another car. once i have this one in the shop im going to fix everything.
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Old 10-23-2013, 03:52 PM   #12
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Is the evap solenoid easy to replace?
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Old 10-23-2013, 04:39 PM   #13
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Is the evap solenoid easy to replace?
Yes. Who is this Wyotech grad and why aren't they helping with this?
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Old 10-23-2013, 04:51 PM   #14
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Old 10-23-2013, 06:28 PM   #15
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hes really busy. doesnt really have time to do free work for me. and i like second opinions. so after the filter and fluid what would you check next? can i have a list of things that you would check?
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Old 10-24-2013, 12:41 AM   #16
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Quote:
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SES light is not on. I got some codes. p1870- Internal trans fault...
The P1870 is the clincher...it's usually indicative of torque convertor clutch failures due to valve body failure...in some cases the TCC regulator system can just be overhauled, but in most cases you need to rebuild the whole mechanism.

Once the vehicle has made it to a cruise state, the PCM begins to monitor the vehicle's cruise ratio. If at some point the transmission begins to slip, P1870 sets and line pressure is elevated in an attempt to stop any further slippage and prevent further damage. This is why DTC 1870 is often accompanied by a complaint of a hard 1-2 upshift. '97 and up 4L60-E seem to have more complaints due to the type of clutch material used..it doesn't hold up as well as its older counterparts...

Sorry to be the bearer of bad news, but there really is only 3 reasons cars end up in the boneyard...either the engine blew, the trans blew, or they were wrecked...I guess we found where yours came in...

Use the warranty and find another one...or rebuild it now and call it done...
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