I think the 4r70w broke

[rog06gt]

Any news Paul?? I have a issue with cruise control in overdrive,it does not work & i have been waiting 3 weeks for a SCT tune remedy that Len is looking after.Cruise works in 3rd but not overdrive!!!

Everything is running good, except I need my car retuned. Still doesnt give any boost in 1st gear. Sometimes when I step on it in 2nd it will either give full boost or no boost until around 4500. I dont think its the converter cause it will give boost at 3k in 2nd most of the time. My MPH gauge is way off. At 70 it says Im going 35mph. Waiting on JDM for a tune. My Cruise control doesnt work in OD either. It goes on for a second, but then it goes off right away.

Guys, aren't the cruise control and the supercharger bypass valve related to load?...
Does your engine make boost in neutral...very little right?...do you think that with all that converter slippage and torque multiplication your engine sees load? very little until it finally start to stall at around 3000+ to 4500 rpm and create load...
At partial throttle you might be able to help create load on the engine...sometimes boost (partial throttle) sometimes not (full throttle)
Your speedometer error might be due to the electronic speed sensor pulse, I think you should have a 6 pulse might be a 12 on the tranny not sure, hint your indicated speed is half of actual...
I really wish somebody else you jump in and comment on this, I'm trying to learn as much as I can before doing the swap and may be somebody can chime in...I don't pretend to hold the truth...
Cheers

 

[Born To Run]

Trans swap

Everything is running good, except I need my car retuned. Still doesnt give any boost in 1st gear. Sometimes when I step on it in 2nd it will either give full boost or no boost until around 4500. I dont think its the converter cause it will give boost at 3k in 2nd most of the time. My MPH gauge is way off. At 70 it says Im going 35mph. Waiting on JDM for a tune. My Cruise control doesnt work in OD either. It goes on for a second, but then it goes off right away.

The trans swap we did should not cause boost to be uneven,unless the ecm takes info from speedo sensor in the trans.My speedo appears to be accurate & my car seems to run fine & seems to have more power(torque).My cruise does the same thing in OD on for 1 sec then off,it has to do with the converter Len said,that is why it works in 3rd,it reads off a speed sensor in the trans.Len was to get me a patch emailed to me for my SCT,i would download then upload in my car,lets see what happens.

 

[yzfone]

I've got the Lentech with a 3200 stall and I make boost in every gear although first and second gears are useless without the drag radials. My cruise only works when the convertor is locked up, its funny that yours works only in third. I still have the ECU for a manual trans, so it makes sense to me that it works when locked up and doesnt work in third due to the computer seeing some kind of problem with the engine rpm and vehicle speed not matching due to convertor slip. Mine read half the speed until the scalars were fixed in the tune.
If I had to do it all over again, I would get exactly what I have now. I love this transmission.

 

[Born To Run]

Trans swap

I've got the Lentech with a 3200 stall and I make boost in every gear although first and second gears are useless without the drag radials. My cruise only works when the convertor is locked up, its funny that yours works only in third. I still have the ECU for a manual trans, so it makes sense to me that it works when locked up and doesnt work in third due to the computer seeing some kind of problem with the engine rpm and vehicle speed not matching due to convertor slip. Mine read half the speed until the scalars were fixed in the tune.
If I had to do it all over again, I would get exactly what I have now. I love this transmission.

I am running a non lockup converter,i think Againstallodds "Paul has one as well.The converter slip in overdrive is causing our problem.It should be corrected in the tune soon,from Lentech.

 

[rog06gt]

I am running a non lockup converter,i think Againstallodds "Paul has one as well.The converter slip in overdrive is causing our problem.It should be corrected in the tune soon,from Lentech.

Do you know if you have the same converter (stall) as againstallodds? thanks.

 

[Born To Run]

Trans swap

Do you know if you have the same converter (stall) as againstallodds? thanks.

I am not sure??

 

[PNR Welding]

I am running a 2600 - 2800 stall. I can get it to stall to 4300 on the transbrake though. It is a non lock up converter.
Randy, do you have a trans temp gauge?

 

[rog06gt]

I am running a 2600 - 2800 stall. I can get it to stall to 4300 on the transbrake though. It is a non lock up converter.
Randy, do you have a trans temp gauge?

You definitely need to keep the trans temp in check...
What size converter? 9.5"?
Cheers

 

[PNR Welding]

You definitely need to keep the trans temp in check...
What size converter? 9.5"?
Cheers

I have a 9.5 inch converter, 2800 stall, non lock up.

 

[Born To Run]

Trans swap

I am running a 2600 - 2800 stall. I can get it to stall to 4300 on the transbrake though. It is a non lock up converter.
Randy, do you have a trans temp gauge?

I have a non lock up converter,with a trans break,the stall is 4000,it is a 9.5" converter,i do not have a trans temp guage,should i get one???

 

[PNR Welding]

I have a non lock up converter,with a trans break,i think the stall is 3000,it is a 9.5" converter,i do not have a trans temp guage,should i get one???

I got one from the recommendation of Mark (ChevyKiller). I installed a electric boost gauge and it works so much better than the mechanical one. But still in 1st gear I get 4psi and it drops down to 1psi. 2nd gear shoots right up to 10psi and then hits 12psi. No matter what RPM its at in 2nd gear when I stomp the gas it goes to 10psi. This leads me to believe its NOT the converter. I think its in the tune. Ill datalog the run in first and 2nd gear later and post the results.

 

[flounderlipps]

Hey Paul
Did you get that wing on yet?
I would like to see some pics, since the only time I've seen the back of your car is when I'm pushing it off the track.

 

[fin1]

I have a non lock up converter,with a trans break,i think the stall is 3000,it is a 9.5" converter,i do not have a trans temp guage,should i get one???

It's good insurance just so you know where your temps are at the track. It also helps on those cold mornings when you want to put some heat into the trany before your run. It also helps if you hot lap or you stay on the trans brake too long. You'll know before your run if your temps are getting too high. I lost a converter w/o one and learned this the hard way.

 

[Born To Run]

Trans swap

It's good insurance just so you know where your temps are at the track. It also helps on those cold mornings when you want to put some heat into the trany before your run. It also helps if you hot lap or you stay on the trans brake too long. You'll know before your run if your temps are getting too high. I lost a converter w/o one and learned this the hard way.[/quote

Good idea,i have a boost guage & fuel pressure guage.I guess i will order a SOS 3 pod pillar now,it never ends does it??

 

[Born To Run]

Trans swap

Do you know if you have the same converter (stall) as againstallodds? thanks.

I found out today that my stall is 4000 rpm on my converter,i still have no solution for my cruise control problem.Len says SCT is working on it!

 

[KILLER06GT]

Hey Paul
Did you get that wing on yet?
I would like to see some pics, since the only time I've seen the back of your car is when I'm pushing it off the track.

HAHA now thats a lie Jim. We know youve seen it more than that.

 

[PNR Welding]

I found out today that my stall is 4000 rpm on my converter,i still have no solution for my cruise control problem.Len says SCT is working on it!

Did Len tell you that? He told me that mine is 2600-2800, but when I use the TB it will rev up to 4300.

 

[rog06gt]

I found out today that my stall is 4000 rpm on my converter,i still have no solution for my cruise control problem.Len says SCT is working on it!

Did Len tell you that? He told me that mine is 2600-2800, but when I use the TB it will rev up to 4300.

By no mean I'm a specialist on this, however I'm doing a lot of search and from I can gather 2600-2800 stall on a 9.5" converter is usually on 250 ft/lbs flywheel torque not 500 ft/lbs, no wonder they are flashing to 4000-4300 rpm...Personnally I would inquire with other converter manufacturer, Dirtydog, Yank, PI and ask their opinion...
As far as I'm concern you are loosing 1300-2000 rpm worth of torque in your powerband, ie leaving at 4300 rpm instead of 2300-3000, you guys must be running out of rpm on the top of 3rd...
All that slippage is a waste of energy and will heat up your tranny oil very quickly may be leading to early failure...
Like I said, I'm not a specialist in auto tranny or drag racing for that matter, this is just my opinion...check with other converter manufacturer...
Cheers

 

[Born To Run]

Trans swap

Did Len tell you that? He told me that mine is 2600-2800, but when I use the TB it will rev up to 4300.

Yeah,I emailed him the question as Sean Hyland asked me to confirm the stall.I thought it was 3000,but Len told me it is 4000.

 

[Born To Run]

Trans swap

By no mean I'm a specialist on this, however I'm doing a lot of search and from I can gather 2600-2800 stall on a 9.5" converter is usually on 250 ft/lbs flywheel torque not 500 ft/lbs, no wonder they are flashing to 4000-4300 rpm...Personnally I would inquire with other converter manufacturer, Dirtydog, Yank, PI and ask their opinion...
As far as I'm concern you are loosing 1300-2000 rpm worth of torque in your powerband, ie leaving at 4300 rpm instead of 2300-3000, you guys must be running out of rpm on the top of 3rd...
All that slippage is a waste of energy and will heat up your tranny oil very quickly may be leading to early failure...
Like I said, I'm not a specialist in auto tranny or drag racing for that matter, this is just my opinion...check with other converter manufacturer...
Cheers

I am not efficent in this tranny stuff either.My RWTQ= 480,are you saying i am better off with a 3000 stall or 4000 stall??