tranny slip Spartan

[JBB66]

Hey guys,

Have the Spartan setup with CAT/DPF Delete (250,275,310)... love it.

How long should it take to do the relearn on the bigger tunes... to where I wouldn't see tranny slip after I get up to speed (70-75) and wot on TC lockup?

If I do have a problem with the tranny, is the torque converter the issue (being the slip)?

Suncoast torque converter the way to go? And what else? Trying to narrow down what I need to do to get the truck up and running 100% again.

Thanks in advance for the replys.

[08stroker250]

How much slip are you seeing on the DashDAQ with the converter locked?

[JBB66]

Went into 1000s - when punched around 70.

Will it do that initially during relearn process? I backed off loaded lower tune... I've noticed it seems to not down shift every now and then like it should.

[JBB66]

It seems to unlock then locks after after 1 or 2 sec.... That was on the 250.

[08stroker250]

The 250 tune will unlock fairly easily below a certain RPM. With my 3.73 gears, I have to be above 72 mph to keep it locked when I hammer it. If you're seeing 1,000 RPM of slip, your converter is not locked. You won't see that with the 275 or 310 tune.

[JBB66]

My truck is 2008 job 3 with long bed and 3.73 gears.

I'll load up 250 again and see what happens.

How much will a suncoast tq converter cost ?

[08stroker250]

Originally Posted by JBB66

My truck is 2008 job 3 with long bed and 3.73 gears.

I'll load up 250 again and see what happens.

How much will a suncoast tq converter cost ?

Get it up to about 75 mph before you put the pedal to the floor.

As for the Suncoast converter, it is $1295.00. I don't think you need one though. You saw that slip because the converter unlocked, which is normal with the 250 tune.

[Stanley F350]

Jeff can you explain a little more about the converter lock up? I am running the 275 and love it, when at easy throttle it shifts a little hard coming out of 1st gear. after the gear change does that mean the converter is locked? The more I drive the better it seems when shifting but still slips now and then when hammered from take off. Maybe axle wrap? Do I need traction bars?

[08stroker250]

With the 275 tune, the converter typically will lock up at 45 mph. Depending on throttle position, it can lock up a little later, but never higher than 50 mph. You can monitor what your converter is doing with a parameter under the generic OBD parameters. I think it's tqslip(rpm) or something close to that. I can't remember for sure.

[JBB66]

Jeff I went back out with 150 tune and figured it doesn't lock converter in until 80mph. 70 or 75 seems to downshift... About normal? When locked it was in ranges under 5.

What kind of rpms should I see on take off up to say 75 mph... I see in 1000-slightly under 1100rpm on slip guage?

Thanks for your help Jeff.