[Night Owl]

I went to pass a SMV when i gave it more fuel it changed gears of course then it revved up and didnt get any faster,so i let off of it and finally made it around the car gave some more pedal still did it,i put it in nuetral back into drive then it was fine,so was it a limp?

 

[SDP-1]

sounds like the convertor was slipping.

 

[Miami Max]

I went to pass a SMV when i gave it more fuel it changed gears of course then it revved up and didnt get any faster,so i let off of it and finally made it around the car gave some more pedal still did it,i put it in nuetral back into drive then it was fine,so was it a limp?

any codes?

 

[Night Owl]

just checked with quad,no codes

 

[duramaxbd03]

either sounds like that or fuel filter

 

[Miami Max]

Doesn't sound like a Limp, normally when you limp, your tranny goes into neutral and wont change gears until you stop shut off and start again, at least thats my experience when my tranny Limped. Usually there is a code related to the tranny 0700 plus whatever code for the problem itself!

 

[nickracer9]

My truck does the same. Just revs out unless I'm in towhaul which locks the torque converter. Anyone know what causes this?

 

[Night Owl]

any other thoughts??

 

[Ridin'GMC]

It's running out of fuel. What level is the quad set at?

 

[Night Owl]

was set at 135,i turned it back to 50 now!!

 

[nickracer9]

I have a airdog lift pump and mine does it on a 80 hp tune. Don't think it's just fuel.

 

[XtremeDMax]

My truck does this when my fuel filter is dirty. It's not slipping... it's starving.

 

[Night Owl]

My truck does this when my fuel filter is dirty. It's not slipping... it's starving.

I hope that is all mine is doing,cant afford a tranny!

 

[XtremeDMax]

It's not your tranny. Change the filter and you'll be good to go. Let us know.

 

[Night Owl]

yeah,I read on another post that some put the shims in ,maybe that would help also? but i will def. replace filter

 

[jzts0214]

X2 change fuel filter.:drink

 

[Ridin'GMC]

Since you had it running at 135, it was starving for fuel when you hammer on it. If you didn't hammer on it, its a dirty fuel filter. You should keep a spare filter in the truck in case the filter plugs up on you down the road, it will save you from a tow home.

 

[silverking]

Mine revs up like that too if I am in a high gear and give it some gas it revs up like its downshifting but it doesnt seem to go any faster, I doubt its fuel though because the motor sounds fine, it just revs. Now you got me thinking....

 

[msudmax]

ill have to check that out too..today on my way to class the truck was "sliping" as I was just touchin the gas..sorta like ure going along on a snowmobile and just tapping the thumb for little burst of speed. well it didnt catch right away..but it shifts great when im just driving normal.

 

[BlackHawk]

it sounds like a slippage or quite possibly limp mode. To me this does sound like limp mode or a dirty filter.. When i had my stock allison and a PPE it did it all the time when i raged it. Felt like the damn transmission fell right out underneath my truck, and as described it would just sit there and rev, not go over 40 mph. So as this gentleman did, i stuck it in neutral put it back in drive and was good to go. Try changing the filter, get on it and if it does it again you either need a lift pump or keep away from that 135 tune.