Dodge RAM 1500 with problems. UPDATED No power when in gear.?

Question

99 ram 1500 4x4

plenum just replaced in june

The trucks been acting funny lately...not speeding up anymore past 4000 rpms...

Thought it was a tranny

but then today, i was driving down the road, and engined just revved and check engine like flashed.

checked teh codes, multiple/random cylinder misfires. Checked twice and all 8 were misfiring at some point.

cant get it above 2500 RPMs or itll just stutter and check engine light will flash.

Any other ideas?

99,917 miles on it now

60,000 pulling horse trailers.

cat's been tested...whole exhaust system is in good shape.

New plugs/wires/cap.

new tranny filter/gasket

any ideas?

after replacing the tranny filter, got it out on the road again to test it...same results past 3000rpms, but its misfiring cylinders 4 and 7 the most...

The truck will rev over 3000 is u mash it to the floor, but just lose speed. but if u just keep accelerating it'll hit 3 grand and stop revving until it shifts. u have to force it over 3000.

and if the engine does rev over 3000 it wont go anywhere, if anythin it loses speed. But i also tried reverse today, as fast as i could get it, and I had no troubles, leading me to believe its not an injection problem, maybe just a tranny?

In nuetral and park, you can rev it up as high as you want with no problems whatsoever, only when in drive.

Tranny bad? Any belts that could be tightened that could stop me from having to replaced the whole tranny?

Answer 1

the transmission only has bands in it and i doubt at this point adjusting them will help,why dont youy have a shop take a look at this one,they might be able to help it some,if the transmission is partially gone though it will have to probably come out for repair,the bands can be adjusted with it in the truck,it would be cheaper at this point to have shop check it,sounds like you may have done all that can be done for it,good luck.