My goerend tranny has a "cutloose" on the 2-3 shift.... Dave's already sent me a new VB with higher line pressures to apply more force on the 2/3 shift.... now it only has the cutloose if shifting under 2k? It's not too bad unless your towing, then the 500 rpm cutloose is more than just annoying, it will almost slam you into the dash.

My TC is a 15 Blade left cut while alot of goerend TC's are 900/400? Does anyone have the same experience? I know of at least one other person experiencing similiar problem???

I may have Dave send me a different type of TC (maybe the 900/400 vs the 15 blade Left cut.

How are HTS and DTT??? are there ANY problems with shifting (say with Smarty Wild)


If I'm heavy on the throttle.. it shifts fine, its the light low RPM (under 2K) that is the problem... and towing, your not getting on it ....??????

Any suggestions......

 

DTT has a box out to control line pressures now....all shift hunt problems are eliminated

 

Will this box work with say Hts and other brands also or just DTT.

 

What do you mean by cutloose? Daily driving my tranny shifts around 1600-1700 rpms and the 1-2 shift drops about 300 rpm and the 2-3 drops maybe 200 rpm and the 3rd lockup drops maybe 100 rpm.

 

technically....i would think all brands but it may only be for sale to DTT customers....but i'm just thinking out loud. Read more here: https://www.dieseltruckresource.com/...d.php?t=153626

 

It doesn't modify line pressures, it modifies the signal the electronic TV control sees to allow running higher line pressures to keep the shuttle shifting from happening and codes, mostly. In order for it to work correctly you have to match the trans build, pressres, TC, and in some cases the right foot to achieve the results you want.

That electronic TV control is a royal pain and is probably the reason you are having the problems under light throttle and not heavy throttle. From your description, I think you would benefit from some higher pressures and use the DTT piece to limit the TV control. Just a guess, but they way the trans reacts to light throttle I feel it would work a lot better if that control is limited and the power handled thru pressure.

Good luck.

 

Again, exactly what is this "cutloose" thing you are talking about? I have a built Gorend tranny and have a small shift issue between 1st and 2nd. This problem occurs if I run a programmer (Smarty, BDDL, etc) with the low-end torque option enabled. I get a shift pattern like: 1st - 2nd - short unlock (RPMS go up) - back to 2nd. I was gonna call Dave this week to find out if this does any damage to the tranny.

Also, this shift issue seems to only happen when the RPMs are low and I am not towing anything. If I get on the pedal hard or tow my 10K-lb camper, I get excellent firm shifts from all gears.

-Ron

 

I don't know what "cutloose" means either. Flair? Are you gaining rpms between when 2nd releases and 3rd ingauges? That would be the electronic tv controller as already stated. I know that Dave has a couple (or at least ordered) to play around with.

 

Ours still have a TV cable to control pressure directly according to throttle position. The new onces have an electronic activated thingymabobber. Not sure if any 05s have them - I think they do, but all 06 and 07 trucks no longer have the manual cable.

 

So the Beta 4.4 version didn't fix the shifting issue for you? Mine shifts perfectly with that version, but not so well with the 4.3 and standard Wild versions.

Did the new VB hold 2nd gear a little longer?

 

this should be an 05+ issue, seems especially bad on 06's for some reason

 

Called 2-3 Shuttle. Seems to not be able to pick a gear. I have had a Suncoast VB and an HTS all do the same thing on '06 and up trucks with the "electric thing". Solution is to replace the 19 pound spring in the vb with the factory 14 pound (orange). This spring is located at the end of the lever inside the vb that the "electirc thing" attaches to. Shifts great once again. I have played with these in my own truck for some time now. I couldnt stand the 2-3 back and forth gear hunt.

 

I'm pretty sure the "shuttle" or "hunting" you're referring to is a separate issue from the "cutloose" or "flare" that some have when running reduced TM programs.

Mine did the gear hunting thing while stock, but hasn't done it since the tranny was built. Dave mentioned he used a stiffer than normal spring (I think in the same location you mentioned) in my VB to help hold 2nd gear longer. That seems to eliminate the cutloose issue but it holds 2nd even longer with those types of programs. Stock or with stock TM it shifts fine. It also shifts fine with the Beta 4.4.

 

The cutloose is what Dave describes it as... I called it a flare, and its different from the gear hunting... mine gear hunt when trying to maintain 25-30 mph. The flare used to be almost 1000rpm increase as the 2nd gear band engaged the 3rd gear drum... mine seamed to be accented by my Billet 3rd Drum too. Dave sent me a new VB that was drilled out a bit more to add more pressure, but even running the new Smarty Beta version, I'm still having a slight 2-500 rpm cutloose if the truck shifts from 2nd to 3rd under 2K rpms.
Dave left me a message today about the DTT shift control that he will program ( you have to know pressures, etc) and he's going to send it to me. He discussed replacing the spring, but doesn't want to get into a bind up situation if there is too much pressure which would be catastrophic to even a built tranny. I just don't know if I have the right TC (15 Blade Left cut) for any amount of towing... Dave told me that with my TC, I can tow up to 5k lbs in drive without having to use Tow/Haul or OD lockout, however when pulling my 5K boat over the weekend, when the truck shifts into OD in drive, if there is any boost built (other than on flat terrain) my turbo barks like crazy every time. It's like the RPM's drop so much it's like spooling the turbo and letting off quick (which normally causes a bark).... this is how my truck drives with this tranny when towing?