spin off fixes it? i dont think so

[reuter]

well finally got some time to play with the old girl last nite. went to pull into the shop, did the same not going into gear shift range inhibited deal after sitting for a few mins.
pulled the truck in after shutting it off and back on, jacked it up, changed the spin off (put a magnet on this time ) and took the truck out for a test drive and it worked perfectly. and i ran it through the paces, drive, reverse, 4wd, 2wd, everything, easy on throttle, WOT, never missed a beat. no slipping or anything.
Everyone said with the P0776 i broke the P2 planatery hub (i think thats what they were saying or cooked c2 and c3) but its hard for me to believe that it would have been fine last night....so my next thought must be electrical gremlin? maybe a wire or something has rubbed raw and only contacts when the outside temp is warmer? the trans warmed up fine and never missed a beat :banghead:....so now i have no clue what the hell is goin on

 

[Cougar281]

You could have cooked clutches. With mine, I'm not exactly sure what actually caused my P0776 to be set, wether it was the clutches slipping or what, but the only damage in mine was my C2's and C3's where burnt. C2 hub and P2 planet splines are still perfect. Still shifted fine after the code. Assuming there is damage, if you have all forward gears, the hard parts are probably not totally shot, but it's possible for the splines to be damaged.

In my case, could I have done a fluid flush and limped along for a while? Maybe, but since Mike said the 0776 is usually something serious, I chose to tear it down. Mike could say better than me, but I doubt an electrical gremlin would casue that code. For some reason, the TCM is commanding PCS2 off. Was the fluid still nice and clean, or was it burnt and/or have debris in it? Mine was nasty brown and I could see fine particles in it as it was draining out from the filter.

Here are the pics of my clutches; C3's where the worst, with C2's being next; C1, C4 & C5 where all ok.

 

[reuter]

didnt cut the filter open yet bc it was cold as hell in the shop last night but the fluid was beautiful. didnt smell burnt and no particles in fluid, i used a clean catch pan and i moved the fluid around and there wasnt anything but trans fluid. still cherry red. i cant believe ive cooked those clutches though, true im not easy on it, but with only a tuner no lift pump (waiting to go on) and it being only a few months old.

it jsut doesnt make sense to me, i know what a slipping allison feels like, when i smoked the stock trans, third gear was like neutral. this thing shifts right into gear and ran like a champ last night.....i guess time will tell how she acts tonite.

 

[d-max joe]

do you have electronic button 4wd? or shift on floor?

 

[Mike L.]

P0776 is not an electrical code. It is a clutch set that was totaly over powered. It is toast. Yank it out and fix it.

 

[LarryJewell]

i've seen that code before, right Mike

 

[Mike L.]

i've seen that code before, right Mike

Larry
That code means it's come to Jesus time for the Alli.
Only the hard core guys see this code. Everyone else will see P0735 or any other incorrect ratio codes. P0776 means you either played too hard or you put it together wrong. Either way your goose is cooked.

 

[reuter]

i have electric push button 4wd. well if its "goose is cooked" why has it not thrown a code for over a week now and i havent been taking the power down at all or being overly gentle. Still shifts strong as ever and doesnt slip. and with the fluid being as beautiful as it was (and not smelling one bit burnt) i still refuse to believe its the clutches. and if something was put together wrong why has it run so great till now? maybe im just using common sense the wrong way...

 

[paint94979]

Listen, I understand you don't want to believe that your clutches are smoked but everytime that code is thrown it is time for a refresh. I see in your sig. you have a homebuilt trans by Moss... that could be your problem right there mix matched parts aren't always the ideal setup. Listen to Mike he is the best we have for the Allison transission he knows his shit so to speak

 

[reuter]

Well cougar sent me a DTAC case for that code and one of the first things it says is to check the ignition switch voltage, which i never believed could have caused a code, but the other night i went to key on and there was nothing....then a few seconds later it came to life reset the clock and everything but started up. done it a few more times since then...im not being a jackass or anything about this, its just ive checked the things i could and my conclusions have been its not the clutches.

With the fluid being as clean and non burnt smelling or looking i just cant believe ive cooked those clutches. I am jsut trying to figure this out before sled season starts so i dont look like a fool going down the track....but if it is time for a refresh, what else can i do to it? i know things dont always go together perfect, but i have a lot done to the trans already (transgo, hot lock up valve, ats TC, ats pump kit and alto clutches) if i were to buy the SC4 kit minus the TC, i would only be using the clutches out of the kit and selling the rest. maybe this is what i will have to do, but what kind are the SC clutches then? are they really that much better than the altos?

 

[WolfLMM]

SC uses Alto as well.

 

[Mike L.]

Well cougar sent me a DTAC case for that code and one of the first things it says is to check the ignition switch voltage, which i never believed could have caused a code, but the other night i went to key on and there was nothing....then a few seconds later it came to life reset the clock and everything but started up. done it a few more times since then...im not being a jackass or anything about this, its just ive checked the things i could and my conclusions have been its not the clutches.

With the fluid being as clean and non burnt smelling or looking i just cant believe ive cooked those clutches. I am jsut trying to figure this out before sled season starts so i dont look like a fool going down the track....but if it is time for a refresh, what else can i do to it? i know things dont always go together perfect, but i have a lot done to the trans already (transgo, hot lock up valve, ats TC, ats pump kit and alto clutches) if i were to buy the SC4 kit minus the TC, i would only be using the clutches out of the kit and selling the rest. maybe this is what i will have to do, but what kind are the SC clutches then? are they really that much better than the altos?

The ignition switch cannot cause the code but what it can do if it is bad is not light up the trim solenoids which is where the pressure comes from and that will cause a big slip which can cause the P0776. This code means that an off going clutch did not release fast enough as the on coming clutch was being applied. This causes a big tie up ( 3 clutches on when only 2 should be on ) and the TCM reads this and throws the code. You may be ok but you at least put some black marks on the clutches.

 

[duratothemax]

How is everyone burning up their trannys/needing to refresh so often...Dave (cougar) yours doesnt even have that many miles on it does it??

I built mine 3 1/2 years ago; its just an old-school suncoast IV, nothing special. I have 85,000 miles on it so far and it still shifts like the day I built it. (I did have to have the converter refreshed, but the trans itself has never been opened) Ive had an aftermarket turbo for 83,000 of those miles, and a built motor/twin turbos for 15,000. Stock trans hard parts and all...

Maybe I got lucky?

 

[paint94979]

How is everyone burning up their trannys/needing to refresh so often...Dave (cougar) yours doesnt even have that many miles on it does it??

I built mine 3 1/2 years ago; its just an old-school suncoast IV, nothing special. I have 85,000 miles on it so far and it still shifts like the day I built it. (I did have to have the converter refreshed, but the trans itself has never been opened) Ive had an aftermarket turbo for 83,000 of those miles, and a built motor/twin turbos for 15,000. Stock trans hard parts and all...

Maybe I got lucky?

How many passes at the track Ben? Also would you agree that if something was not done properly in the initial rebuild that could be attributed to all of the burnt clutches?

 

[duratothemax]

somewhere close to 200 passes...and daily abuse/towing/etc. Hell its lasted through two motors.

 

[reuter]

The ignition switch cannot cause the code but what it can do if it is bad is not light up the trim solenoids which is where the pressure comes from and that will cause a big slip which can cause the P0776. This code means that an off going clutch did not release fast enough as the on coming clutch was being applied. This causes a big tie up ( 3 clutches on when only 2 should be on ) and the TCM reads this and throws the code. You may be ok but you at least put some black marks on the clutches.

Alright, now that makes sense, and i can totally agree there might be some nice black marks because when i was out trying to get consistant codes she was acting mighty funny with its shifting habits. but always the 700 and 776 codes. I am looking into this on sat along with lift pump bc now at key on the truck will just go dead, like no juice (no lights, dash dead, truck wont do anything). So i might have a bad ground or some accidental offroading might have moved some wiring in an undisired location we will see how the old girl acts after this weekend.

and thanks again Mike and Dave (and all the others looking into this ) for putting up with me, i know im just a dumb redneck farmboy with too heavy a right foot that loves black smoke. hell i work for John Deere, that ought to say something but thanks again for helping me out!!!

 

[Bentley]

How is everyone burning up their trannys/needing to refresh so often...Dave (cougar) yours doesnt even have that many miles on it does it??

I built mine 3 1/2 years ago; its just an old-school suncoast IV, nothing special. I have 85,000 miles on it so far and it still shifts like the day I built it. (I did have to have the converter refreshed, but the trans itself has never been opened) Ive had an aftermarket turbo for 83,000 of those miles, and a built motor/twin turbos for 15,000. Stock trans hard parts and all...

Maybe I got lucky?

Mine has gone 100,000 miles with out a hickup. Same build as you ben, same time and very similar abuse! Although I have only had a race tune and stock turbo...

 

[mainer]

I'll vouch for Ben's abuse.... if there is someone out there that drives a truck as hard as Ben you are few and far between.... his right foot has 2 positions the brake pedal on the floor... or the gas pedal on the floor (sometimes both at the same time now that i think of it)

but then what about jeds truck with 40k on tranny now?? with stock clutches, transgo, 1050 and 20k of an A5k

 

[Blueox03]

From my experience, these things don't start showing that they are hurt til it's mortal..... I beat mine for 160K when it gave up the ghost...and it didn't start showing signs until it was well done...Now that I rebuilt it, I realize the temps have been high for a year or two...