need advice at 100mph

[dirtdemon]

todays news :

floored it @ ~60mph , when passing 100mph ... it happend

power goes down and feels like the rev-limiter, it happend so fast that it came up twice ... stepped off the pedal and no prob anymore ??

tranny in OD, boost 15psi and ~ 4500rpm , all temperatures ok- no check engine light, no code :dunno: (and of course no DM-rec :banghead: )

after that happend (sure that fuel-delivery is not the prob, the 2nd try i watched the FPgauge - also ok ... but no kickdown this time), truck still pulls strong - what could have happend - ideas ??

... maybe tranny - no upshift or something possible ??

please help me out, feelin kinda *poo* because of that :rant:

TIA,pat.


btw.: i already rode the truck around 115 mph w/o probs - but not floored ..

 

[dgoodhue]

Re: need advice at 100mph

tranny in OD, boost 15psi and ~ 4500rpm ,


... maybe tranny - no upshift or something possible ??

4500rpm at 100mph is the top of 3rd gear (drive), so your transmission is not doing a WOT 3-4 shift. Try WOT in Drive and then doing the 3-4 shift manually at 4500 rpm.

 

[dirtdemon]

Re: need advice at 100mph

4500rpm at 100mph is the top of 3rd gear (drive), so your transmission is not doing a WOT 3-4 shift. Try WOT in Drive and then doing the 3-4 shift manually at 4500 rpm.

... i did drive along the highway in OD - so shouldn'd i've been already in 4th gear ... or do you mean i was in 4th (OD) and it shifts back to 3rd when nailed, but then it's unable to shift up - did i get you right ?

... if so, what will cure that ??

btw.: the TC-shudder is an indicator for that or not ?

TIA,pat.

 

[dgoodhue]

Re: need advice at 100mph

or do you mean i was in 4th (OD) and it shifts back to 3rd when nailed, but then it's unable to shift up - did i get you right ?

... if so, what will cure that ??

Yes, try as I said before.

Try WOT in Drive and then doing the 3-4 shift manually at 4500 rpm.

 

[dirtdemon]

Re: need advice at 100mph

ok, now i got the possible cause, but isn't there anything to fix ??

... so that things work like they should again :dunno: or is my tranny toast ??

pat.