When pulling a load at 2000 RPMs and the transmission downshifts, it jumps to 3000 RPMs and instantly drops back to 2500 and settles in. A spike in RPMs like that can't be good for drive compents when pulling heavy loads!

 

Don't hold the fuel peddle to the floor when you push the clutch in!

 

it is a auto trans sorry i should have said

 

I notice mine does the same when pulling my 9000 lb travel trailer.

 

The spike is when the transmission unlocks to shift down, not too big of a deal on a free wheeling stator, thats why it unlocks before shifting down. I would be more concerned if it didn't unlock.

The drop in rpm's is when the converter locks back up in the lower gear.

 

still seems like a 1000 rpm jump in a half a second would be a lock of shock to engine-drive train an trans over a period of time this could cause some serious problems

 

If your concerned you could always not use T/H mode.
Come to think of it I don't think mine goes from 2000 RPM up to 3000 RPM. Yes rpms come up when down shifting useing T/H pulling a 12,000 lb. load but I don't think it's 1000 rpm's. Guess I'll have to check next time when I'am towing. I know I would have noticed a 1,000 rpm jump though so I don't think mine does that.

 

when it hits 3000 it instanly drops to 2500 but for a second it is at 3000