Trouble downshifting

There is no synchronization at all in heavy truck manual transmissions. They are non synchros. YOU are the synchro'ier.

1000 to 1500 is too drastic. 15 is too #### slow. 6th is generally high range and somehwere in the 30's coming down into the low range box if I remember right. You down shift at around 1300 by kicking it into nuetral, slap the engine RPM up to at least 1600 and then use the clutch to complete the next gear down which should be right there waiting for you. The whole thing takes a few heartbeats.

What you do not do is stand or ride on the clutch. The thing is only to be used just enough to break power and make shifting possible. And even more rarely, used all the way to the floor to engage the brake to get you into a starting gear at the stop sign, stop light etc.

Any of this helping?

 

Holding clutch in too long allows transmission to lose sync with flywheel speed. If you want to double clutch,
Clutch
Shift to neutral
Release clutch
Rev up engine
Clutch to gear
Release clutch

This has to be done Pretty fast and in sync or it’s never gonna go into gear.
When double clutching down shifting, don’t pussyfoot the throttle, give it a good hard rev and it will go in

 

Sing this song in your head while double clutching.
Clutch-neutral, clutch gear

Downshifting
Clutch-neutral, rev, clutch-gear

Practice with your plunger while you are pooping on the tirlet

 

Use the Adams family show their song,

 

The Adams family . .

 

Let the clutch out is correct.
Might want to slow to 10 mph and make sure Jake is off.

 

I don't down shift until 10 and rev it and falLS right in gear ends up around 14 or 15 .... on motors from this century you dont want to be over 1500 rpm ...... cant drive it like a 4 speed chevett. .... its better not to use the clutch but the only time you hold the clutch in is when you are stopped in gear or stopped and wanting to put it in gear . when up or down shifting if you use the clutch you just bump it and release maybe a quarter of the way down at the most . its not rocket science and after awhile you will be able to do it by sound

 

Don’t just look at the road speed but also the engine rpm. It’s gonna be a bit different every time you shift. So at 15 mph in 8th you might be bumping it 1000 rpm, but at 15 mph in 7th you may only have to bump it 3-400. Just check your revs when you go to neutral then bump it a few hundred over that number and she’ll slide right in.

 

I've grown weary of trying to describe shifting, clearly, this person, and many others today, don't have a clue what's going on in the transmission, will probably never get it, and should probably just drive an automatic.