Just smoked another transmission...

[Corb@CorbinShipping]

Lol smooshie very technical term

powered by this (╯°□°)╯

I looked that one up... It's in the manual... LOL

 

[Dzchey21]

Lol smooshie very technical term

powered by this (╯°□°)╯

It's similar to your cheeks lol

 

[Corb@CorbinShipping]

It's similar to your cheeks lol

LOL

 

[Charles]

What's bad is when you pull a trans with a catestrophic failure like snapped input or broken converter hub only to see that the clutches are also smoked...

So...


LOL

 

[range91]

You don't want soft shifts with blue or red clutch plates it won't live long..and in 450-550s don't those have 513 gears so the trans is working a little easier even if the truck ways 12k pounds. If the truck is used for towing and working hard try to keep it as close to stock as possible and upgrade weak points like pressure spikes and molded piston failure. Only dozen or so I have worked on have either been blown out LR snap ring which breaks the case or piston failure

 

[Fast-6.0]

The "street" truck failures we have seen are 450's. Two converters now and two input shafts. Of the units I tore apart the clutches were great.

 

[range91]

Looks like most 450 ratios were 430.. Fast6.0 what do you guys use for converters when u build these and do those seem to hold up?

 

[kyle43335]

i feel that its the rate that the converter is locked.

on/off style lockup versus slipping the clutch together. with the weight of these heavier trucks, you have to be careful.

johns 550 snapped a input shaft, and his fathers (stock) 550 stripped the splines in the converter.

 

[Twinturbostroker]

Gotta remember replacing clutches every year or two is always better than breaking shafts, converters, or gears... My little truck runs pretty soft shifting for this reason

Hmmmm.....interesting

 

[Charles]

There isn't anything stupid built into the F-450 chassis that's accounting for variances is it? Like anything that Ford may have built in to artificially raise the line pressure or something on those trucks so they could use the same trans build and shove it in a 450 and it would rock out? Then these guys change the programming and hard parts and everything gets shifted way out of whack.

Like.... if the tcu had some kind of offset built in, and then a trans with enlarged holes, increased friction count and a program with line set for a normal situation were used it would be too much.

 

[mclean]

There isn't anything stupid built into the F-450 chassis that's accounting for variances is it? Like anything that Ford may have built in to artificially raise the line pressure or something on those trucks so they could use the same trans build and shove it in a 450 and it would rock out? Then these guys change the programming and hard parts and everything gets shifted way out of whack.

Like.... if the tcu had some kind of offset built in, and then a trans with enlarged holes, increased friction count and a program with line set for a normal situation were used it would be too much.

Customs tunes should over-ride that if there was such a thing wouldn't they?

 

[Charles]

Customs tunes should over-ride that if there was such a thing wouldn't they?

Not if it were in the chassis. I'm not familiar with the 6.4 trucks enough to say...

But for an example, what if a person were to place a resistor in a sensor signal wire to alter that sensor output for a specific case. Then someone comes along and then changes the program to do the same thing the resistor did. Then the outcome would be a twofold increase in that parameter.

If there is a separate ECM, and TCU, then the TCU could be programmed separately, and not behaving as intended when the program on the ECU was written in trucks without that TCU program.


Or..... it could be something as simple as 450's having zero sidewall give in the tires, busting hubs out of converters because everything is so hooked up 100% drive all the time with no "fluff" anywhere to take shock.

 

[Corb@CorbinShipping]

I dont know about all of that, honestly. The TCM for the 250, 350, 350 drw, and 450 are all the same part #, according to my dealership in FL. As well, the all are the same part # for the front spring, as many told me that the 450 spring was stiffer, and I wanted a little softer, but not a Gasser front spring... etc...

I do know, that I like the gear head tuning. Drove 490 miles today, mostly highway, some city, and some rural, and some dirt roads... Never had an issue shifting. Even putting the edal down a bit, the shifts never made my foot bounce, or had a neck snapping feel to them. They were not "smooshie" either though... LOL

 

[6.4psd916]

Matts tunes are great, they firm up the more throttle you apply.

 

[tbsimmons]

Corb I do know tuning gas engines that if you have a built tranny you dont tune the tranny pressure tables the same. Reason is what you are seeing. To much pressure. Basically I would use the stock pressure tables starting out then increase slowly.


Sent from the bat phone near a drilling rig.

 

[Corb@CorbinShipping]

Corb I do know tuning gas engines that if you have a built tranny you dont tune the tranny pressure tables the same. Reason is what you are seeing. To much pressure. Basically I would use the stock pressure tables starting out then increase slowly.


Sent from the bat phone near a drilling rig.

I really like this tune... And this is just a STREET tune... The trans feels fine. I think that the trans could be softened up a little bit more, but this is a very nice running rig again.

 

[6.4psd916]

All matts tunes shift the same, amazing. There is very little if any difference between them.