Noticing a little tranny slippage on my 2014 with SC...

I think I'm sensing some slippage when I mash the pedal from a dead stop between 1st. and 2nd. It's a bit hard to say for sure because it is subtle. I also haven't been doing it much because I don't purposefully want to cause any damage. I've seen a couple of different threads about this, and I'm aware of IPT and their valve body kits, but I don't want to void my warranty this early in the game. I've also seen recommendations for Lube Gard, which looks interesting but I'm not sure how well it would perform on a new tranny. Any other suggestions? I read an article that said that there were electronic transmission tuners available but I'm not aware of any except Bully Dog, etc, and I'm not interested in that crap. I'm also wondering if it may be a simple break-in issue that may resolve itself over time. Curious to hear what others have experienced.

 

Man, there's a ton of innuendo in this post. As for your tranny, don't mash the pedal. You're treating her too rough.

 

your fine. Valve body upgrades were pretty much only done for torque converter lockup shudder on earlier models.... later models are fine as this has been fixed from toyota AFAIK.

the auto trans just simply slides through gears... it does not shift super firm.

 

Try posting in the performance section.

I'd say if ur not gunna do the vb upgrade then atlleast get a drain and fill regularly. I do every 30k.

Don't add any crap into the fluid tho...... That's usually snake oil

 

On a side note..... How in the world are u sensing slippage when mashing the pedal from a stop?

I spin past 60 when I do that

 

haha right, my buddies sc'd taco will spin 285 LT duratracs without much effort

I guess rolling into it in the first part of 1st to be at WOT without spinning at the 1st to 2nd shift is easily possible though. Again i doubt its truly slipping. and if it is, you should have warranty on it.

 

0-60 run: http://youtu.be/uvB3HtyI4vA

 

Mine will barely break the tires loose from a dead stop, and if it does it is very brief. I don't have any other mods except for the SC. Another factor is that I'm located just above 5000 feet in elevation, which would account for some power loss, although hard to quantify in tire burning. The slippage I'm describing is in the form of a shudder.

 

You have the shudder too? Have you concluded it's the TC?

 

I'm also wondering if I have the best or most appropriate re-flash. I wonder how a person would know that? Trip to the dealer, I suppose.

 

Yeah, that might be the first place to start. It wouldn't be bad to document the issue as well. I do hate going to the dealer though.

 

Really? I wasn't aware of any changes. It makes sense though. Especially if Toyota is willing to install superchargers and warranty them along with the rest of the drive-train.

 

Have you checked for a low fluid level ? very common condition .

These trucks were designed for gramma and grandpa who want that nice smooth sunday driver type of shifting . Full throttle off the line will probably have some ill effects if you are feeling a shudder as the transmission upshifts into 2nd gear .
90 percent of the supercharged members here end up going with a valve body upgrade . Unfortunately , Toyota doesnt offer a valve body package for the supercharger

 

Shudder while accelerating at WOT, from a dead stop can be numerous things. You're stressing the drivetrain to extensively at that point

-axle/wheel hop
-Traction control
-the LSD working
-engine/tranny mounts absorbing vibrations

But why "mash" the pedal from dead stop in a SC Tacoma? At 5000 feet? You need to experience a true performance vehicle, if you're getting grins from beating your mid-sized pick-up truck.

 

Yes, I did check the fluid and it is at the proper level. I've seen several of your posts and know your background and was hoping you would respond. I'm interested in doing the valve body work, but I don't want to mess up the warranty at this point. Plus, I believe I would have to do the job myself (removing/installing the VB) and I'm not anxious to do that....just yet. I've seen you recommend Lube Gard before, do you think it would have a positive effect?

 

Thanks for the concern, but I'm not mashing the pedal wherever I go. Far from it. I take care of my vehicles and tend to get a lot of life and mileage out of them. I discovered this issue from playing around a bit to see how the truck would perform, not playing hot rod. When I felt the shudder I thought it deserved a little looking into. If there is a reasonable tweak that will help the performance and longevity, then I'll do it.

 

The trans does need a tune (if capable) or valve body to improve shifting firmness and timing with the added power. No doubt about it

 

Greasing the driveshaft u-joints would be a good start.

 

I am not sure if Lube Guard will take care of your issue . Although Lube Guard is a highly friction modified supplement and works amazingly well for torque converter shudder and shift shudders , I believe you need to figure out what exactly is happening on the 1st to 2nd upshift .

All i can do from the keyboard is recommend taking the truck to a transmission shop and allow them to test ride with you in the truck to determine if it is an actual transmission concern or something else in the drive line causing the problem .A skilled test driver will tell you on the spot whats going on and how to fix the issue .
Road tests are free .
My truck is not supercharged and under full load , the 1-2 upshift is tolerable but could be cleaned up substantially with a valve body modification . For you guys with the supercharger , I wouldnt consider full throttle runs from a stand still unless a valve body modification has been done .Dealerships dont work on valve bodies other than the odd solenoid replacement ,therefore you could install the kit and they would likely never know . I believe there are 3 or 4 different companies out there now that offer complete valve bodies and 4 or 5 different companies that sell valve body kits for the do it yourself type of guy .
Trans-go is number 1
Sonnax is # 2 .
If you go to a transmission shop and they havnt heard of these manufacturers , turn your truck around and leave .

 

Thank you for the response! I think that's a good suggestion. I might make a couple of phone calls and try to get a feel for a shop that seems to be on top of their game. It's been decades since I've had any transmission work so I really haven't much of a clue who is out there. It might take some valve body work in the end and a good shop will hopefully have some recommendations.