Question about 2001 Pontiac Grand Prix

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01 GTP Supercharged -recently R & R trans but having same prob.

My 01 GTP would occasionally slip out of gear which became more frequent but at the same time my speedometer & heads up disp would bounce and fluctuate radically. I replaced trans w/used from another GP that I drove with no problems ( I did keep orig trans to rebuild). The speedometer does not work at all now, trans is behaving the same way the original did. The only engine code Im getting is "low input speed sensor" I have no clue where the sensor is located or if it will solve my trans prob.

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Check on side of trans, should look like sensor with electrical connection, run scanner for trouble codes

Posted on Sep 20, 2009

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1994 voyager 3.0 slips in first only reverse and all other gears fine


Have to rebuild the transaxle

You changed the fluid on an already slipping
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Too old a vehicle to put time & money into

I owned a trans repair shop in the early 1990's
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Pull the trans & rebuild it

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What does the code P0963 indicate - what wires to check?


Could be many things, but once a transmission
slips,even a few times, one day & you continue
to drive it, you ruin it & the clutches burn
Only a complete rebuild along with the electrical,
solenoids or whatever the current issues are, will
be the solution or fix
Wasting your time at auto zone or any parts store
checking for codes. Codes don't tell you what is wrong
or what to do.
You can't work on the car,has to be diagnosed by experience
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I have a ford 500 and im having prob. with transmission slipping once the car gets warmed up


If you have been driving a transmission with any slipping,
you most likely have ruined it,I guess you know that

If this just started today ,then you may be able to diagnose
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Need a trans repair shop

Getting warmed up & only then slipping, can take your
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Without pulling it out,you need to find the best diagnostic
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1 Answer

I lost reverse and overdrive is slipping and humming at low speeds on my 4.3L two wheel drive '97 sonoma! Does this mean a whole new rebuilt/swap transmission or can it be something less such as a


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---------Automatic transmission will not go into high gear? http://howtobyme.blogspot.com/2011/11/automatic-transmission-will-not-go-into.html
------------Transmission shifting problem on Toyota Land cruiser? http://schematicsdiagram.blogspot.com/2012/01/transmission-shifting-problem-on-toyota.html
---------Transmission Slips out of gear? http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html
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1 Answer

We have a March 2002 model, so far it has had 3 new clutches. We now have the problem that when the car is in fourth gear, it slips out frequently. No gearbox noises or problems when in other gears. The...


I will assume you bought the vehicle used

The transmission has been somewhat abused &
will have to come out to fix the fourth gear problem

There is no reason to have 3 clutches put in a vehicle that
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Again,abuse,poor driving habit & most certainly poor quality
parts & workmanship on all the clutch service

I will go so far as to say ,none of the clutch work was ever done
correctly any time,no matter how you drive.

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98 grand prix gtp tranny


The tranny is called a 4T65E-HD(heavy duty). The rebuild kits are the same for both supercharged and non-supercharged cars. The occasional harshness is caused by the EPC solenoid hanging up from wear. I recommend installing a Superior Shift Correction kit, 4th clutch hub (the splines strip), EPC, and TCC/PWM solenoid.

This combo works great!

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1 Answer

2006 Pontiac G6 GTP Transmission Drive Not Working


trans usually coupled (electroically) with engine revs. check computer chip. perform computer diagnostics.

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