Im reading here on the DTT forum. And its confusing me. From what i understand that if you have more PSI going through out the tranny then your tranny will live longer? Also that the PSI coming out of your accumulator port should be within 5PSI for every gear.

So my question is...Is a normal guy like me able to raise the PSI to the tranny? Also would it be wise to?

Thanks for helping my brain.

 

DTT has instructions for increasing the line pressure on their website. Shanti actually faxed the instructions to me because I couldn't find them.

Helped my stock trans last 170K with the mods in my sig. Finally burnt the lock up clutch out of the TC.....

 

110k, modded since 50k, upped line pressures only, still slipping/flaring strong.

 

Anyone got a link directly to line pressure adjustment procedure. I have tried a couple of times over the past months to find it but can't seem to locate it on thier site.

 

http://www.dieseltrans.com/phpBB/viewtopic.php?t=68

i did my pressure 3 turns. my light throttle shifting later-- i believe it was about 1.5 to 1.75 turns or so, i would have personally gone a little further, but is still shifts a lot better than it did.

Tom

 

Sweet thanks alot

 

3kracker, with a full suncoast transmission you already have enough (more than stock) line pressure, plus the added benefits of the updated/upgraded internals. any more pressure than you're running now may shift too harsh for your liking, but that depends on your preference and the way the builder/installer set up the valve body.

 

I agree. I'd leave it alone.

 

On a performance tranny all modifications should be done after a talk to the manufacturer only.
And any adjustment should be done with a gauge to measure the baseline and the results.
On stock trannies too high line pressure can blow out seals. If you don't have a gauge you won't know whether you are just 1psi below blowing it or 15.... so turning the adjuster on the pressure reg will give you what ???

AlpineRAM

 

This is an interesting thread! I wasn't aware we could up the pressures ourselves. Aside from blowing the seals, are there other major pitfalls to avoid?? Does anyone know of a tranny thread with the specifications to shoot for?

I love my truck, and want it to live for a looonnnggg time.

 

When you raise the pressure, you raise the shift points. You could end up with the trans hanging in a gear and you have to lift the throttle to shift. With all the fooling and learning time, which gets expensive, you will be far ahead to buy a VB from a good shop. Set up right for your application.
call DTT. DTT

 

IMHO you can do it yourself too as long as you havve a pressure gauge set to determine whether your tranny has internal leaks etc.
The problem with upping hte line pressure is that DC didn't adjust for low pressures for fun. The stock parts like front piston seal etc are designed for this pressure and not much more. So if you up the pressure you are running towards the edge of some of the seals. If that seal blows, the line pressure may stay high, but the effective pressure acting on the piston is lower, therefore less holding force on the clutch. Upped line pressure will also change the way the governor pressure acts- so you'll need to lower the pressure sensor excitation voltage. Shift points will have to be adjusted accordingly.
j-fox is right with his comment on the pricing and the efficiency of a VB made by a professional company. (They'll also inform you on the limits of what you have in your tranny)
Any adjustment of the line pressure without checking for internal leaks and repairing them if necessary will be playing on chance. (You bet your tranny on it )

AlpineRAM

 

Great tips, Thanks! I am a "do-it-yourself" mechanic, having done all of my own service work and service work for friends and relatives for years, so anything I can learn to do on my own is great. I love reading the Tech. articles in performance magazines, and have had great success learning from others' experiences, so I really appreciate everything I am learning at this web community!!! I bought my 2001 this past June, largely based on what I could research here and at TDR, and am absolutely thrilled with my truck! Even my wife is impressed, loving the fact I get the same and sometimes better mileage than her 1999 3.8L Dodge Grand Caravan! Niether of drives like we stole our vehicles, but we don't baby them, either!

 

yeah hey guys i know this thread is pretty old...i dunno if Bill is on this thread at all but ido have acouple questions

what is the standard pressure(stock) on my tranny for example....what stock reading should i be looking for if i ever decide to increase the pressure and then im sure uv done the research on the following....how much psi can the stcok tranny (if healthy) hold before busting seals?? and what psi do u recommend??
i like hard shiting...crisp snap ur head a bit shifting...lol i dont need any smooth comfy stuff...this is a truck just for me....i take it quite easy on the truck always have and i dotn tow...its a fun mobile