how well do the transmissions hold up under alot of power

 

As-in while towing or after a lot of performance mods and being heavy-footed with it? I think I've heard suggestions for a tranny cooler for a little better longevity.

 

Towing is fine, under lots, ie boosted, power its real questionable.

Just make sure you tow in tow/haul and hot rod in o/d off.

The weak link in these tranny's is the 2nd prime gear, specifically downshifts to it under heavy load/power. The tow/haul and od off lock out this gear, so it's not an issue.

 

going to build a 5.7 hemi and put it in a 95 dakota mabey making 500 horses and a good shot of gas think a built trans will hold up to that dont really know a whole lot abot the newer trucks

 

On forums that are more geared toward the Performance Shops and major gear heads, the consensus is that 320-340 RWHP or about 430-450 at the engine is the mark where stock trannies start to tear up in 1500 & 2500 series trucks. You can basically add about 90 HP or so to a stock Hemi truck before having to think major upgrade to the tranny.
When I add the Cam to my current mods I'm going to be well into that area and don't think I haven't given a lot of thought to the added expense of bringing the tranny up to spec...

 

thanks just wanted to see even if i built one would it hold up
i know that a 4l60 in a f body with a good bit of power wont hold up know matter what even if its built