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Discussion Starter #1
Had the 275v4 loaded on the truck for about 4,000 miles in that it has been in a few drag racing events and just mountain and town driving..little freeway to. anyways when I floor it at 65-70 mph with the converter locked the slippage has started varying alot by that I mean it will jump all around from 2rpms of slip clear up to 22rpms. While at WOT it will just vary up and down....is it time for a new converter??? oh yeah the tranny is a bone stock job 1.
 

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Mine does the same thing (with the 310 tune). On the highway, it will vary from .25 to 5.75 rpms. Every once in a while it will spike to 12 or so when doing regular highway driving. If I do a WOT run, it will easily slip to 22 for fractions of a second.

I have never really monitored the TC when running the 275 tunes. My truck doesn't like the 275v4 much. I ran 275v3 a lot though.

08stroker250 says that is normal for me. He's been running the 310 tune for several months.
 

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Discussion Starter #4
No. My truck runs fine pulls hard and everythig (runs a 13.3) its just when I step on it and its locked up I seeing the slippage spike up to around 22ish Im just wondering if this is a sign my converter is give'in up. anyone else have input:dunno:
 

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I have seen over 100 with the 310 tune lol. My truck is still making 550 horsepower and 1120 foot lbs/tq on the dyno though. I am not to worried about it at this point.
 

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How are you guys measuring slip? There is sooo much stuff you can monitor on the DD...which command is it? Also, wondering which gauge you all prefer to use? What are the most important things to monitor?
 

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Discussion Starter #7
anyone else?? kinda trying to make a decision on wether or not I need to drop the dough on a new converter. Would the spartan tcm and suncoast solenoids help this at all? what about reloading the tune?
 

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Think Im having the same problem, when I punch it from 60mph(and it doesn't jerk the **** out of me) the revs when you get to 2500rpm will skip to 3500rpm fast, the truck will still pull pretty good all the way up to 100mph but that motor is reving up way to fast.
 

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Discussion Starter #9
i think we might need the spartan tech to enlighten us on this a bit...I dont blame spartans tuning at all id just like to know what im looking at.
 

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someone posted that anything over 10 for slip with the converter locked start looking for a new one i think
 

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How are you guys measuring slip? There is sooo much stuff you can monitor on the DD...which command is it? Also, wondering which gauge you all prefer to use? What are the most important things to monitor?
bump, bump
 

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Its under Generic OBDII parameters. TQ Slip (RPM) is the name of it. Monitor with a digital number instead of like a mechanical looking gauge. Dont be alarmed with the low gear numbers. Get out on the highway and watch it with the converter locked only. So with the 210 tune, you will need to running 75-80, roll into it, and keep it to the floor. It shouldnt get above 5 or so. If it does, dont run anything higher than the 210 tune. I only see 5 and below with the 210, but with the 275 and 310 I see real high. I have seen above 100 with the 310. But my truck is still making power 548/1118 foot lbs, so its not too bad I dont think.
 

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I have been watching this for a few days. Mine will fluctuate between 0 and 5 pretty much all the time. Including when I have let off the throttle and the boost drops. Obviously if you don't have any boost, and no throttle, there isn't enough torque to slip the torque converter. That leads me to believe that the 0-5 rpm reading is fine. If my truck is cold (110* or less on the TFT), the TC slips a lot more. Once it warms up, it will hold better. Even then though, if I give it full throttle with the TC locked, it can some times slip up to 50rpms.

Suncoast converter and a super duty kit are my next expenditures.
 

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Its time for new converters guys. When you can feel the truck go and then have it feel like it shifts then its time for a new one. Mine was reading around 7 to 10 when I would get in it and lock it up. Put the new PI converter in and it stays at 1 or below now.
 

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Mine is doing worse today than yesterday. It slips up to 150+ rpms when I give it full throttle at 70 mph..

:(

I guess I will be doing it sooner than I thought.
 

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Damn!! Mine hasnt hit that high. I see no more than 3 or 4 with the 210 tune. With the production 310/TCM combo I see about 45-50 at most. With the stock Job 1 TCM, I was seeing as high as 115 or so.
 

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Mine did it before the spartan...

Obviously i couldn't measure slippage, but same scenerio, cruisen around 60-65 and stomp it and shoots to 3200 and slowly shifts to the next gear where it crawls up in speed...

But if it was the converter it would slip or not lock up in the lower gears, which I haven't had any problems with... Knock on wood!:doh:

Maybe there is some sort of torque management on these trucks in the higher gears since the internals are smaller and more likely to break in 4-5 gear...

Just a shoot in the dark, I don't know what the hell I am talking about...:hehe:
 

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Ive been running the 210 for about 400 miles now. i bounce between 0 and 6 at light to moderate throttle. i believe that this is reading the springs on the plate compensating for small torque differences.but i can see 25 rpm slippage on 3/4 throttle pulling a 11% grade 70 - 90 mph (just did it tonight playing around with a guy in a dmax and i was watching it closely to see how much i could make it slip up till then i could only make it slip 10rpm around town). don't know how much slip i seen stock. i may tune back just to see if i can get it to break loose. even at 30 rpm that is 1 revolution of slip every 2 seconds. don't know if this is actually enough slip to cause significant wear to the clutch plates.
 
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