4t60 vs 3t40 VS 4t65

[TGPilot]

All posts that are not straight facts to TurboGTUs amazing progress to hopefully finally get a performance tranny together for the TGP/TSTE have been removed.

Any posts on here that do not directly relate to TurboGTU's progress will be immediately dismissed and deleted. :icon_cool:

I am not being a Nazi-Admin...it is just that this is one of the BEST tranny related threads we have ever had on here. I want this to be a place for TurboGTU to return to and be able to see what he may have missed or thought was there previously...etc etc.

[TurboGTU]

I just saw that the thread was going nowhere after some good feed back/ graditude, then after that,  joking around.  :icon_rolleyes:  :icon_wink:  . 

YOur feed back/cosernce is always welcome Jeff since you know more about this trans history than anyone on any GM FWD site right now. Jud is also welcome since he's about the only one whose seems to have the power to burn up a good working stock TGP trans. If someone (tries to) puts it together...they can post progress or issues with the build for their trans. Not saying you have to give your good setup away if you don't wanto , but if you feel stuck...well see what could be done via PM or here and post update if posible.

That said... Thank you everyone.  :icon_cool:

ON with the show...

[z284pwr]

I just saw that the thread was going nowhere after some good feed back/ graditude, then after that,  joking around.  :icon_rolleyes:  :icon_wink:  . 

YOur feed back/cosernce is always welcome Jeff since you know more about this trans history than anyone on any GM FWD site right now. Jud is also welcome since he's about the only one whose seems to have the power to burn up a good working stock TGP trans. If someone (tries to) puts it together...they can post progress or issues with the build for their trans. Not saying you have to give your good setup away if you don't wanto , but if you feel stuck...well see what could be done via PM or here and post update if posible.

That said... Thank you everyone.  :icon_cool:

ON with the show...

Well, like I have said before and will continue to say, anyone willing to throw up a kit I'm WILLING to buy it and install it and see how it holds up, including Jeff, Jud, yourself, or anyone else. 
I'm quite serious on this too as my engine took a perfectly running rebuilt transmission and in no time it caused it interesting issues.  Hell the engine doesn't even make power/boost till 2700-3000 so I know low end torque hasn't been the only factor that has cause the transmission issues.  I really would like to get a transmission in good rebuilt condition going before I even think of throwing a new turbo on this thing, I'm afraid of what that would do if this tiny T25 can cause it to slip and not shift.

[mclaren18psi]

so are you going to build a kit cause i need one bad i cooked my fluid at the track im in ohio so intese is close but i have heard mixed things about them from all the 3800 guys and i thought of the shop in detroit that does a performace build for i think 1400 installed but i really dont havea problem rebuilding mine


are any of the hard parts in the 89tgp trans the same  as a 700r4 200r4 th350/400 or any other comon built trans?

[TurboGTU]

I been TOOO deep in my 2.3 that I have side lined the TGP. I've already took the GTU trans apart and it was the reaction ring gear that was becoming tootless. Bought a new one with a new sun gear for the DIfff as it was getting cavities. Put 5 clutches in input pack for more hold and got a black Kevlar band. THe so called "high energy" band the trans store sold me was burning.

I would think Intense can get most of the thing you need. So can "Raptor" (forgot buisness name) ..they sell a Rapter 65. THey sell the diode sprag and planets i think. The shell you could get at a trans store and the 2nd carrier you can get from the dealer or J/Y cores.

I recomend getting a CHEAP J/Y 4t65 trans and just use its guts with Intense parts. I paid $120 for mine at a you pull it J/Y with no warrenty as the fluid wans't burned nor was the differential stressed (easy to check first for a doner before pulling) That way you won't be jumping everywhere for parts.

[GPChief]

TurboGTU,

   Any updates (fingers crossed)

[TurboGTU]

 :icon_twisted:  :icon_mrgreen:
.
.
.
.
.
.
.
:icon_frown: No.  :icon_rolleyes:

I had still been playing with the thunderbird, driving the BMW and working like a dog and paying the house off.
Now that the thuderbird went down (crashed at 120mph against the wall first week this month)...I'll have time to work on the TGP.

But as far as I'm concerned..there shouldn't be any problem adapting the 65 parts. should be stright foward. Have you run into a stumbluing block?

[GPChief]

No stumbling blocks, a transmission building acquaintance thinks he has a list of parts that can help the 4T60 handle all the power we can give it.  He has built several of these trannys that have gone into V8 fieros.  With proper cooling (read protecting it from the turbos heat) he thinks it will do fine. 

It (like everything else on these cars) is just going to cost a little more than I had budgeted for.  I plan on having the drivetrain out before the new year.  Unfortunately I deploy early next year so I may not get an update :icon_sad:.

[GangstGP]

:icon_twisted:  :icon_mrgreen:
.
.
.
.
.
.
.
:icon_frown: No.  :icon_rolleyes:

I had still been playing with the thunderbird, driving the BMW and working like a dog and paying the house off.
Now that the thuderbird went down (crashed at 120mph against the wall first week this month)...I'll have time to work on the TGP.

But as far as I'm concerned..there shouldn't be any problem adapting the 65 parts. should be stright foward. Have you run into a stumbluing block?

Youcrashed at 120????????    glad you are still with us!!!!  was it fun? :laugh:


so you found that the 65 has some of the same internals as the 60 huh?..hmmm I will keep that in mind.  but how do you check real easy if the diff is good and other quick checks since I have a spare TGP tranny sitting here?

[TurboGTU]

Yea..thise types of builds get pricy real quick. But it'll be worth the effort.

Thanks "G"...Crashing at 120 was kinda exciting..I wasn't freaked out...but a little supprised the car didn't controll itself.

The differential doen't really go bad on thise trannies...the OD clutch pack and the 2nd and 3rd packs go bad. YOu can check this by checking the condition of the oil ...or whats left of the residue. If its smells burnt..it needs a rebuild. The modulator ususaly has some tell tell oil residue if all the oil has been drained. But usualy..all TGP trannies removed working or not need a rebuild because of the years of service. Checking the differential, I usually am only able to check to see if the bearings are good. I do this by trying to move the passenger side inner cv axle up and down/ side to side. If it moves alot (more than a 1/4 in)..its bad bearings.

[greyT]

Hello.  I am new here, and this thread has really picked up my interest.  Has there been any updates or further progress?  I would really like to learn the recipe for a tough 4t60 that could handle alot of power.

Don 

[sleeperred90tgp]

No updates done that I know off. :icon_cry: Sounds like he is working on a house or land to build one. Hope that pans out. I would consider that most important. Hopefully he will get back into his project and share more of his info.

Mine is on it's last legs so I have been babying it. Have to start in 1st (shift lever) get rolling and I can shift to second. Wind it out to much more than normal so when it goes into 3rd it wont slip. Forget passing gear I can hit 6 K at 50 MPH if I try that shit. Don't really know if it will take another 1/4 mile run but if I foot break the shit out of it it hauls ass other than about 5 minuets to shift from 2nd to 3rd and then it pulls like a freight train. If I try it atleast my AAA is current. :laugh: Heck my TA has more miles on a truck than I have put on it in a year. TGP has only been towed about 4 times. None being the tranny. Always manage to limp to the trans shop.

Won't be long and the TGP will have to go back to the rebuilder. Can't really complain. about 80 k on it now an it has held up better than the first one. (70k) Can't think of one thats had more abuse. ;)

Jud

[TurboGTU]

I'll be building the HD 4t60 for the beretta. Stay tuned for a 80-e swap into the TGP. :icon_eek:

[DefEddie]

I'd like to bump this thread to see what everyone came up with.

I'm rebuilding a tgp 4t60 (hopefully this saturday) and it will be other than stock.
Not extreme,but needs to hold up to daily "spirited" driving pushing ~350ish hp in a 2700lb car.(fiero)

Easiest thing for me is just pick up a 65E core,but I can get discount new also since i'm a dealer tech so might go that way.

What did you guy's find out that is holding up for you?
I'm not a trans tech,and though I diagnose and dig into the electronics and valvebodies i've stayed away from going into the case/anywhere past the pump.
What advice do you have for any particular issues I might run into?
Are there any known obvious issues I should guard against?
The friend I have walking me through the rebuild has never done any performance stuff.
The guy that usually does my trans for my race stuff is ill,so don't wish to bother him.
What do I watch out for?

Thanks for any advice.

[Prospeeder]

I was curious, is the 3T40 very strong? I wanna find Turbo stuff for my 6000, and I would just run the stock tune, think the 3T40 would last long?