Re: Have a 4T65E Question? Please Read! Triple Edge contact info
Hey Guys Gals and Mr Trannyman We have a 2000 GTP 3800 Series 2 car. We have never had a tranny issue before with the car and in fact if we had not taken it on a highway drive I doubt my wife would have even noticed. However with me driving I quickly found out there is an issue. 1-2-3rd are all perfect, no slipping shifts solid. However if left in 4th it never gets there, and when its suppose to shift it never does, and when you lift off the throttle the revs just drop down to idle until you step on the gas and it reaches back to where 3rd gear rpms would be at. If you leave it in 3rd it will zip along fine, 75mph at 3000rpms. Lift off the throttle the rpms stay put and the car slows down. Put it back into 4th RPMS stay at 3000rpms but when you lift off now they drop to around 1000rpms until you step on the gas again they spool back up to 3000. Shifting the shifter from 3-4 and 4-3 makes no difference aside from the rpms being able to drop. The car has 137,000 miles on it, and before we owned it, it was owned by an older couple that did all Dealer Service and the car had Zero mods done to it. Only thing I have done is plugs, wires, cone filter and lube job.
I did notice when the problem happened, that the car was about 1qt low on trans fluid, below the add line, but still showing on the dipstick.
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
my 99 grand prix wont shift into o/d i read about it on here to check the 4th gear hub/clutch how to i get to it i would like to fix it myself i am car savvy but no clue about this my rpms are ot 3000 when im doing 60 any help would be great
thank you
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
Bill I wish you lived closer so I could get my trans fixed!
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
Quote:
Originally Posted by
GTPSHAWTY
having the same problems as the rest of you.. first gear fine.. second fine til its time to shift... it slips nd jerks... then might shift to third... if it shifts to third it goes straight to fourth.. then when it hits fourth the rpm jumps up and down like it wanna downshift and continues that..... after i come to a stop and try to take off.. it leaves realllyyyyyyy slow and build up speed.. like its in third gear.... same thing when i try to hand shift it......... 97 gtp
So how did u fix this problem?
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
So how did u fix tis problem?
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
I belive he sold the car.
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
maybe I'm missing it but can you technically put a 4t65e non hd in a GTP and expect it to be reliable. I know gearing is different and it it has a harder input shaft
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
Quote:
Originally Posted by
BillBoost37
I belive he sold the car.
That's the easy way out. LOL
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
Quote:
Originally Posted by
EricGTP
maybe I'm missing it but can you technically put a 4t65e non hd in a GTP and expect it to be reliable. I know gearing is different and it it has a harder input shaft
Non HD and HD have the same input shaft. You can put one in. Many guys do top swaps on non HD trans and they can last reasonably. The biggest variable is how your foot treats the throttle.
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
awesome just pulled a trans from a na 01 regal. Been hearing about differential swaps. Anything I could use that would be beneficial. If I stay with this diff will I need to get an na cv shaft.
only paid about 150 for the trans so hopefully everything goes well.
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
hey guys, new here but always had a prix gt and thunderbird SC love these cars.. but im buying a 2000 gt and the tranny wont shift into 3rd gear.. no 4 or over drive. u cant even put in 3 manually?? is it just the silinoid A or B? im buying it in the morning so help would be awesome. thanks guys
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
A soleniod would not stop the manual linkage from moving, if I'm reading that correctly.
Fourth gear can be the splines on the clutch shaft, third could be smoked clutches or a bad sprag.
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
EricGTP I made the swap and yes you will need a different shorter shaft & you will get a code 730 gear ratio code unless you program PCM for new gear ratio! But the better alternative is to change trans diffs then you end up with HD diff and no codes!
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
Have 01 GTP changed trans to 05 Century. I think that is 2.93 to 3.29. when I read gear ratio in HPTuner it says that it is set to 3.29 but it throws me codes 1810 & 730
Also car sometimes shifts perfect and other it goes from 1st to 3rd(in this mode seems like it goes to full pressure, Harsher shifts) and that's it. Changes when ignition key is cycled sometimes.
Set tire size (In HPTuners) to 25.82 and ratio to 3.42, now no more codes but trans now doesn't shift correctly once again. Only goes from 1st to 3rd no other gears and no lock up!
(Next day)Just tried it again ad now it worked! Doesn't make any sense!
Drove it last night still worked but did not shut off check engine light came on. Again this mourning went 5 miles shut off for 30 minutes and returned again no shift. also checked pcm for dcts before and 1810 returned.
Can Any one help me here?
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
Hey Dave and Bill,
I got a built tranny for a 99 GTP (with 300m input shaft, 7/8ths chain, etc.) and the car rotted out to the point where I scrapped it, well I bought an 04 GT (L26 not L32 and NO TAPSHIFT) and was wondering what I have to change wiring wise to make it work in this car before I put it in. I have a spare transmission harness from a 99 that I can change the pins around on if I need to then put that in my 99 trans that's sitting on the table. I also noticed that the 04 doesnt have the plastic box on top for the BCM&PCM to know what gear you're in, that's intresting.
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
When you swap the trans instead of dealing with the wiring harness and a whole mess of other things....You can just swap the valve body, channel plate, and internal wiring harness from the 04 trans to the 99 built trans that you have.
Don't mind me asking but who built the "built trans"? And also you'll need to verify some of the valve body upgrade in the "built trans" and a few of the main ones are easy to spot like the boost valve. You can swap over most of the valve body upgrades also....all except the ones that require special reaming tools.
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
Previous owner of the trans said it was a TEP. when I bought it it had 10k. Then I put about another 10k on it. I just took it apart to change the 4340 out for a 300m.
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
On the gear ratio question. It should be posted somewhere how to program with HPT from 2.93 to 3,.29. Keep in mind that on a 2.93 HPT will show the ratio as 3.29 because it's referring to the differential not the overall ratio. 3.29 diff plus 1.121 sprockets = 2.93 overall ratio. It's basically change the ratio to 3.69 and reenter the tire size.. his auto and commit. But find that post and make sure I'm saying that properly.
On the trans swap. Lookup a writeup by me on how to put an external park neutral switch on a transmission with an internal switch for the gear selector and that will get the pcm to know what gear is selected. From there I think there might be one other pin swap that needs to happen to make it work. Check GMforums.com and a guy by the name of xtremerevolution I think is who posted it and found it on NEpontiac.org. Or look at the wiring schematics on the two years.
Looks like Xtreme had an 03, which is a different monster from this one. I though he may have gotten an 05 trans. Search on him and maybe you can find that pin stuff I'm talking about.
Re: Have a 4T65E Question? Please Read! Triple Edge contact info
Hey bill I finally found that pose on adding a switch to the top of the trans. But I want to do that opposite, I want to take my trans designed for the external switch and put it into a car that has the internal switch.
As for Xtreme, found him on the site but could not find the post you were talking about.