gillbot

iTrader: (27)

Thin is kinda a tuning and kinda a trans question but I'll ask here first. What is the MAX rpm on the 4L60e? My trans seems to get lazy the higher I spin my motor.

I used to have my shift points set at 6300rpm and my limiter at 6500rpm and ran time after time without a problem. After a recent dyno trip I realized that my HP was still climbing at 6300rpm so I changed my shift point to 6600rpm and my limiter to 6800rpm. At the track today, I hit the limiter on every shift, every pass. Same 200rpm split, no changes other than moving the limiter and shift point up a few hundred rpm. Why is it hitting the limiter now?

I pulled my shift points down to 6400rpm while at the track and my last pass I still hit the limiter. (Limiter was left at 6800) Also, the trans started shifting into 2nd before I got past the tree! It's never done this before and I don't know why it's starting it now, unless I really am just spinning THAT bad!

BubaGumpShrimp

iTrader: (1)

6,800 god i hope you have a cam and springs in your ride. If its stock your getting valve float..

Mssingkid

iTrader: (7)

Any chance the trans is slipping up top?? At WOT you wouldn't even notice it that much as it would jump to the revlimiter before shifting.

gillbot

iTrader: (27)

I'm just trying to figure out why it never did this before and now all of a sudden it's doing it alot. Perhaps it is caused by wheelspin?

gillbot

iTrader: (27)

Any other ideas? Maybe it's just slipping too much due to all the power?

RevGTO

iTrader: (12)

This is from an Internal Engine thread ...

gillbot

iTrader: (27)

I dropped my shift points to 6400 from 6600, maybe I need to back it down to 6200 again but I leave SOOOOOO much power on the table that way. SIGH!

RevGTO

iTrader: (12)

I guess that's the deal when you have an A4 and a cam the moves the powerband up. Either you fail to maximize the potential of your cam or you fail to maximize the potential life of your tranny. Pick your poison ...

BlackHawk T/A

iTrader: (3)

I remember that post, and I don't agree with it. HEAT and POWER are the main killers of the transmission. Have you ever seen someone break their transmission due to RPM? Didn't think so. How many have torched bands from heat or broken hard parts from stress?

gillbot

iTrader: (27)

I know the tranny is going to break, that's a given. I'd leave my shift points at 66 if the dam thing would just SHIFT! The issue isn't me killing it, it's that iw will NOT shift and I'd like to figure out why.

RevGTO

iTrader: (12)

I've always considered it common knowledge that automatic transmissions have rev limitations. The factory limits not only power but the revs that a given transmission is built to turn. We all know what heat will do ... I edited a lot out of that post. He also said ...
The point really isn't about how many transmissions one has or hasn't seen go south ... like most stuff on the internet, people can go back and forth all day long swapping anecdotal evidence. The issue is what happens physically within a transmission at certain rpm levels. If an engineer or tranny pro would post up with some facts, that could shed some light on a question that is of immense practical consequence to all of us. If nobody like that posts up here, then maybe it'd be worth starting a new thread.

gillbot

iTrader: (27)

I just want to know what I need to do to make my tranny shift how I want it to! It USED to shift fine, now it doesn't.

BlackHawk T/A

iTrader: (3)

Heat is a product of RPM, so you'd have to take that into consideration. What is the RPM actually doing to the transmission (making it hot as hell).

gillbot

iTrader: (27)

So I'm guessing that i'll have to keep backing down the shift rpm until it finally goes?

obZidian

iTrader: (2)

well, i have the same issues and i think the best thing to do is back down the shift points...

I have my rev limiter at 7200rpm and shift between 6400 or 6700rpm.

ji guess thats to much for the 4l60e?

gillbot

iTrader: (27)

I guess that's what i'll have to do then. I was shifting at 6300, reving to 6500 and everything was fine. Then I tried shifting at 6600, reving to 6800 and it will not shift. I backed the shift rpm down to 6400 but left the rev limiter at 6800 and it still won't shift.

orion565

iTrader: (4)

sounds like what my tranny did before it blew!

you2slo

Have you gone back to the original setting yet? Did that fix the problem?

gillbot

iTrader: (27)

That's my next plan but honestly my power is still climbing at 6300 so i'd prefer not to. All I want is that 11 sec timeslip!

you2slo

It would at least let you know what the problem could be. Good luck getting that user title change.