Trans will not shift to 3rd at WOT

[JimmyXR7]

Getting on the freeway I opened it up. Trans down shifted to first, engine rev'ed to 5k and shifted. Continued to rev up to 5k+ (about 80 MPH) and stayed there.
Next morning the trans/engine did the same. Today there was some traffic so kept hammmer off and the trans shifted OK.
Is this the wiring?
Torque Converter?
Computer?
Trans fluid losing it?
Any ideas?
Thanks
Jim

[Zack]

If you have stock gears and programming the car will shift into 3rd at about 6100rpm's or about 90mph.
Its fine, keep hammering it, it likes it.

[Smokie]

Getting on the freeway I opened it up. Trans down shifted to first, engine rev'ed to 5k and shifted. Continued to rev up to 5k+ (about 80 MPH) and stayed there.
JimWhat do you mean "stayed there". If you are at WOT it won't shift into 3rd at 80 mph, not supposed to. If you mean you backed off the throttle at 80 mph and it did not shift into 3rd then there is a problem....unless you turned off O/D.

[CRUZTAKER]

Yeah...not sure here either.

You need to elaborate with your story a little more. We can't figure out what gear you finalized in. Tell us about your Maruader as well...year...model...any mods...etc.

My shifts hit at 6200 or better, and my third gear winds out at 142, but I never WOT with the OD on. You shouldn't either.

[MENINBLK]

Getting on the freeway I opened it up. Trans down shifted to first, engine rev'ed to 5k and shifted. Continued to rev up to 5k+ (about 80 MPH) and stayed there.
Next morning the trans/engine did the same. Today there was some traffic so kept hammmer off and the trans shifted OK.
Is this the wiring?
Torque Converter?
Computer?
Trans fluid losing it?
Any ideas?
Thanks
Jim

WHAT YEAR MARAUDER ?
HOW MANY MILES ?

[BillyGman]

If you have stock gears and programming the car will shift into 3rd at about 6100rpm's or about 90mph.
Its fine, keep hammering it, it likes it.Zack is correct. IF you have the factory stock rear end gear ratio (3.55:1) then your transmission will not shift into third during full throttle until after 90-95 MPH. So it doesn't sound to me like there's anything wrong. I have 4.56 gears in the rear end of my Marauder, and at full throttle, it shifts into third at 75 MPH. But with 4.56 gears in the rear, the car is reving at 6,100 RPM's in second gear at 75 MPH, and when it hits third gear at that speed, the engine revs drop to 4,000 RPM's.

If your car has the stock 3.55 gears in the rear, then at 80 MPH the engine is only reving at 5,200 RPM's in second gear, and if you're at full throttle, then you wouldn't want it shifting into third until the RPM's climb higher. With 3.55 gears, if your transmission shifted into third gear at 80 MPH, your engine revs would only be at 3,300 RPM's, and that's too low for full throttle. It wouldn't be optimal for power.

As it's already been indicated, at WOT your transmission should be shifting into third gear at 90-95 MPH. If you want to see third gear at a slower speed than that, then you'll have to ease off the gas pedal a little.

[wesman]

I had a similar situation happen to me at a racetrack, turned out to be a crappy tank of gas. It just would not pull past 5k in second. I put new gas in, prob fixed.

[metroplex]

Russ/JerseyVics turned off OD whenever he went WOT. His OD band still roasted eventually. He has gone through about 3-4 of the OD bands...

[worksuxxx]

cruztaker,

142 mph in 3rd??? What gears are you running, dont see your mods.. I have 410's and I think raps out around 118mph. That is about where my o/d kicks in. Even w/ 355's I wouldn't imagine it would go that high. I may be wrong, but let me know.. Hmmm, how does 142 mph feel anyway, have to know.

[Smokie]

With stock gears doing 140 mph is not a problem, is merely 6000 rpm's....finding the safe space to do the 140 mph is the problem.

[CRUZTAKER]

cruztaker,

142 mph in 3rd??? What gears are you running, dont see your mods.. I have 410's and I think raps out around 118mph.....
I have 4:10's. ;)

There is a link in my sig for my mods.

[JimmyXR7]

IF you have the factory stock rear end gear ratio (3.55:1) then your transmission will not shift into third during full throttle until after 90-95 MPH. So it doesn't sound to me like there's anything wrong.
If your car has the stock 3.55 gears in the rear, then at 80 MPH the engine is only reving at 5,200 RPM's in second gear, e.There was traffic today again so I could not open it up when getting on the Freeway. but the traffic cleared at the next freeway. So I floored it, Trans down shifted to 2nd, engine/car wound up to 90 MPH and shifted to third without a problem. I do not know if it was bad gas or what. hopefully It will be light traffic tomorrow with the Fourth of July comming up and I can try it again from the stoplight. Jim

[BillyGman]

There was traffic today again so I could not open it up when getting on the Freeway. but the traffic cleared at the next freeway. So I floored it, Trans down shifted to 2nd, engine/car wound up to 90 MPH and shifted to third without a problem. I do not know if it was bad gas or what. hopefully It will be light traffic tomorrow with the Fourth of July comming up and I can try it again from the stoplight. JimSounds like everything is fine Jimmy. Drive on my friend. :banana2:

[worksuxxx]

Cruz,

Saw your mods, 410's and 142mph in 3rd gear? I have 410's and only capable of 120mph in 3rd. Did I miss something?

[Black Terror]

The speed limiter has to be removed/reset by either a Chip or Reflash.
After that, 140's in 3rd gear is very possible.

[worksuxxx]

Black Terror,

Sorry, I have Lidio's tune, so my shiftpoints have been raised and speed limiter is no longer there. I am just stating my MM will only do 120 mph in 3rd gear, at about 120 mph it will shift into O/D even with the O/D turned off. I am not sure of the RPM's it is turning at 120 though, only hit that speed a couple times with the 410's and once I hit that speed I let off since I have OEM driveshaft. Possibly I am getting O/D prematurely, maybe 5000 RPM. But surely another 1200 RPM would not gain me 22 MPH to reach the claimed 142 MPH. Anybody else have Lidio's tune w/410's and familiar with those speeds?

[frdwrnch]

I have 4:10's and a tune by jerry w/stock exhaust and can regularly hit 120 w/OD off and goes 140 no problem. My "secure" test area doesn't allow me to go much farther but i feel it'll do 145.

[JimmyXR7]

I had a similar situation happen to me at a racetrack, turned out to be a crappy tank of gas. It just would not pull past 5k in second. I put new gas in, prob fixed. New tank of gas - I think the problem is solved - Thanks
The highest grade of gas available here is 91 octane.
When I purchased the MM (used) in April 05 I had to put gas in from the car dealer to drive home. I decided not to chance it and used premium 91 octane at $3.099 a gallon at the station near the dealer.
I have been using my local station which charges only $2.799 a gallon for 91. A motorcycle buddy told me the single hose on the pump holds 0.40 gallons of the previous gas used and my station has one hose for all three pump grades. He does not use gas from single hose pumps for his motorcycle. After my problem, I drove around the 6 pumps until I found pump #2 which someone had used 91 octane. I think the other people thought I was crazy!
What octane results when 8 gallons of 91 is mixed with 0.4 gallons of 87 octane?
Jim