Hello I have a 2002 Camaro Z28 I had my 4l60 rebuilt at RPM and I added a new Yank 3600. My car prieviously had a Yank 3600 in it. After the new trans and convertor my shift points are off. Lock up use to hit at 45 mph now it locks up at 52 mph. Also my car hits the rev limiter on the 2/3 ****. The new Yank 3600 is looser than my other. Can my shift points be corrected by tuning? And how?

 

They can definitely be corrected with hp tuners or efi live or various others. The how becomes more difficult because they are all a little different. Without being able to look at how it's set now, also makes it difficult to explain. You can set shift points various ways, but generally speaking, to shift, it must satisfy 2 requirements. I normally set speed and rpm, at least on WOT shifts.
Do you have access to any tuning stuff? If not, perhaps someone will chime in about PC Hammer. I believe that's the free one some guys are using. I haven't touched it. It seems complicated to me, but I also don't need to use it, so I'm not very patient with new things anymore. It's a symptom of getting old. LOL

 

I use the free Bluecat software with HP Tuners to dial in the converter and shift points.

Cesar has a great YT video showing how to use the software... simple as generate the data then copy & paste.

 

Agree - this software is almost identical to the tuning software on this forum from "Cool Aid". Cool Aid has a sticky on the Transmission forum.

https://ls1tech.com/forums/automatic...tm-w-pics.html

Suggestion to OP.

If you have a tuner do this for you - make sure the tuner understands that you want the drivability tuning done with you in the car and driving and that he follows one or the other from the links above. You will understand why when you set TTC control during highway cruise (follow the steps based on how you want the car to drive). Don't leave the car with the tuner.

I'm pretty sure RPM like Performabuilt suggest that you leave line pressure etc alone because both do that when building the transmission. Be careful here. The 4l60e doesn't like extremely high rpm shifts -north of 6500.

If you don't like the loose converter pretty sure Dave at Yank will tighten it up for you. I like my Yank blower converter 3450. IMO 3600 is too loose for city cruise

For $20 you can download Maslic's manual that has a complete section devoted to the 4l60e. It's how to but Maslic also explains why.

http://www.masterenginetuner.com/

 

Thank you the tuner changed the lock up speed to 45 mph. He did adjust the line pressure a little. Ill have to see how much dont wanna tear anything up

 

Thank you for your help

 

Thank you for your response

 

Went back out to the track and my issue seems to be the 3/4 shift hesitating at wot. It was doing this before my RPM transmission rebuild. I dont understand why this issue ocured

 

As suggested in previous post - download this manual. It explains how to fix this issue or cause.

For example: on page 99 it explains that the WOT table always overrides the mph (road speed) table. That's a rule your tuner needs to know when entering values in the transmission tables. Your tuner need to review all of the values in all of the tables making sure there are not any conflicts. The rev limiter also must be considered when setting WOT values.

Same for the 3-4 shift. Check with RPM when setting the 3-4 shift. The 4l60e It might not like 6500 rpm during the 3-4 shift but is acceptable from 1-2 and 2-3.

http://www.masterenginetuner.com/

http://www.masterenginetuner.com/4l6...nsmission.html

There is also an explanation for line pressure in conjunction with shift timing for quicker shifts.

 

Thanks will do

 

Yeah if you make any kind of power, and do a WOT 3-4 shift, you might do it once, or twice, but you'll be pulling that trans out very soon after that. Those 60's just can't take it.
You shouldn't need to shift into 4th to make a 1/4 mile hit, you either have too much gear or too short of a tire or something.

 

A 4L60-E won't upshift to 4th (OD) at full throttle unless the programming's been messed with.