Transmission woes?

[petethepug]

Time to add a 10 speed?

2007.5-2013 GM Truck - Powertrain Swap Solutions

www.powertrainswapsolutions.com

 

[Marky Dissod]

If you manage a 10L80 conversion, 3.42 is PLENTY of axle gear!

 

[donjetman]

Where is the best place to send the fluid to?

blackstone-labs.com is the cheapest but is taking about 5 weeks to get results these days
jglubricantservices.com is my favorite for atf. Here's why and more:
https://www.tahoeyukonforum.com/threads/used-atf-lab-results.118039/

 

[donjetman]

I’m willing to do either a torque converter or a trans on this truck.

Torque Converters: https://cvcconverters.com/
or
https://www.circledspecialties.com/
or

https://gopnh.com/

I went with the gopnh.com # P4646, still going strong 70k miles & 6 yrs later.
https://www.tahoeyukonforum.com/thr...7-yukon-denali-6-2.108334/page-3#post-1293118

 

[donjetman]

I haven’t dropped the pan yet as the filter & gasket are on order. Weird can’t just go to NAPA n pick one up.

6L80 Trans filter = GM# 24236933
Here's a thread I did when I did a tranny filter change:
https://www.tahoeyukonforum.com/threads/6l80-filter-change.108378/

 

[Foggy]

It does have the 3.42. It is the plan to get a larger cooler on this thing. I generally see temps steady 190-200 in ambient temps above 60 degrees. This is According to the DIC. We all know that it can be inaccurate

The trans temp DIC reading is actually very accurate..
Your Torque Conv is generally the culprit/weakest link.
When you get ready to do your overhaul/rebuild make sure you
have a good aftermarket HD TC in hand or your local rebuilder
prob has a very good source.
After all work is done and trans has been running normally for a couple hundered
miles, then get it programmed so you won't have to do it again.
Anyone with hptuners or blackbear can take care of you.
The shift timing and torque converter settings need to be changed to get
good life out of your new trans & conv

 

[5strmtrp]

If you do rebuild / replace the transmission, do the torque converter too.
Most transmission warranties specify replacing the torque converter as a qualifying condition.
New 6L80 + old torque converter = very short-lived 6L80 with no warranty.

You didn't ask your LT1 Caprice tuner? Or your LT1 Caprice tuner didn't have a good answer?
BlackBear Performance comes highly recommended here.
PCM Performance (20 years experience) comes highly recommended by me (and 20 years of others).
There are other reputable tuners out there.
You'll likely get best results from a tuner who uses your realtime driving data to inform the finer points of your ecm & tcm tune.

I hesitate to say, it sounds to me like you may not want / need 3.73?
If that turns out to be the case, your external ATF cooler may only need a helping fan on it.
A thorough ecm & tcm tuning, among many other things, does address radiator fan cooling temp thresholds as well.

Speaking of ATF thermal management, you may want to ask about 'flipping your pill', or something ...

I miss typed this, if I’m doing the converter I’m doing the trans as well. Larger external cooler & programming to get rid of the shudder and improve line pressure etc.

My Caprice is a 2014 Caprice PPV. Essentially a Holden Statesman. Longer in body b-pillar back than the Chevy SS.
The tuner I’ve been to with this car knows his stuff, however it’s an hour n half to him for me.

Appreciate the information and suggestions

 

[5strmtrp]

Everything you ever wanted to know about the 6L80 trans can be found here:

GM 6L80 Transmission Information Thread

Hi All, Since so many of us own at least one Tahoe or Yukon equipped with a 6L80, I figured I'd start an all-encompassing transmission thread with videos, links and other information as it relates to the 6L80/90 transmissions. I'll get it going with a tear down and inspection video and go from...

www.tahoeyukonforum.com

What are 'sweating' lines' in this context? I get those in the summer when it's hot but never seen them on a vehicle...

“Sweating lines”. The trans lines from the trans to the front of the truck radiator external cooler. The fittings from hard line to flex line near the front of the motor are always oily seeping a bit. Hence what I call sweating lines.

 

[NickTransmissions]

“Sweating lines”. The trans lines from the trans to the front of the truck radiator external cooler. The fittings from hard line to flex line near the front of the motor are always oily seeping a bit. Hence what I call sweating lines.

Seepage from the transmission cooler lines is not normal hence why I had no idea what you were referring to by "sweating lines"...Do a visual inspection and replace anything that's found to be defective. You may or may not have to replace your cooler lines in part or entirely, depending on what you find.

 

[Marky Dissod]

My Caprice is a 2014 Caprice PPV. Essentially a Holden Statesman. Longer in body b-pillar back than the Chevy SS.

Don't know it as thoroughly as the mid-90s Caprice, but I know final Caprices well enough.
Best bang-for-the-buck performance sedan GM has or will ever make, sadly.

The tuner I’ve been to with this car knows his stuff, however it’s an hour n half to him for me.

If he gets the '14 Caprice PPV well enough, he can tune your '14 SSV.
Nothing beats using real-time driving data to fine-tune your ... tune.
Have him meet you halfway, each of you drive 45min toward each other ...