years ago i drove a international with a 10 speed road ranger tranny. i was able to shift without the clutch by bringing RPMs up. needed the clutch only stopping and starting. what about our cummins diesels? can these also be shifter without clutch or will damage occur? anyone out there do this?<br><br>thanks,<br>david

 

Yes,old truckers never die they just buy a new dodge

 

yes it can be done? or yes, damage will occure ??? also how high do i want my RPMs to shift each gear?<br><br>thanks again

 

What your talking about is powershifting. Yes it can be done. But let me tell you a story about a friend who did that. He broke, not bent, BROKE all the shift forks in the tranny, blew all the synchros, and did some major damage on the inside. So I don't encourage it.

 

[quote author=david h link=board=10;threadid=6221;start=0#56880 date=1035468528]
years ago i drove a international with a 10 speed road ranger tranny. i was able to shift without the clutch by bringing RPMs up. needed the clutch only stopping and starting. what about our cummins diesels? can these also be shifter without clutch or will damage occur? anyone out there do this?

thanks,
david
[/quote]

I'm thinking yes...as I was not only able to, but frequently did this with my old 1995 Chevy S-10 4 cylinder. I learned the habit driving lumber yard trucks and just carried it over to my little S-10. I don't see any reason why your truck wouldn't do the same....and I don't see how it could cause any damage. The worst thing it could do for you is make you clutch last a little longer....

Despite what Blue says....I don't think it will hurt anything. Just don't force it. When it gets to the right RPM it will just slide right on up into gear. Trying to force it IS bad though.

Hey Blue...I thought this was called &quot;speedshifting&quot;?? Am I wrong?

 

Sure you can do it. Just make sure I get to see the innards of the transmission after performing this little feat. What most people dont realize is that the OTR trucks have a NON SYNCHRO transmission. Ours is synchroed. Shifting without a clutch is one of the fastest ways to take the synchros out of a synchroed transmission.

Also, a word of caution to those running an NV4500 and attempting this. As most people know, the 3rd gear synchro is BAD about going out in this tranny. Powershifting will only shorten it even more. My question to you is WHY? If you didnt wanna use the clutch in the first place you should have got an auto.

 

I do it all the time, and can't see how it could possibly cause any damage as long as it goes smoothly into gear. Now if you don't have the revs quite right, it grinds, and you force it, that's a problem. Some people say it's bad for the synchros, but it's unclear to me how it's any worse on the synchros than a normal shift--yes, the clutch decouples the engine and transmission, but obviously things don't stop turning or there wouldn't be any reason for synchros in the first place. Meaning that since there's always rotation involved, there's always synchro wear involved to some extent.

 

[quote author=jfpointer link=board=10;threadid=6221;start=0#57020 date=1035480010]<br>I do it all the time, and can't see how it could possibly cause any damage as long as it goes smoothly into gear. Now if you don't have the revs quite right, it grinds, and you force it, that's a problem. Some people say it's bad for the synchros, but it's unclear to me how it's any worse on the synchros than a normal shift--yes, the clutch decouples the engine and transmission, but obviously things don't stop turning or there wouldn't be any reason for synchros in the first place. Meaning that since there's always rotation involved, there's always synchro wear involved to some extent.<br>[/quote]<br><br>I'm with you....I don't see the problem... ??? ??? ???<br><br>I put almost 100,000 miles on my little S-10 before I traded it in and probably at least half of that was after I learned to shift without the clutch. I never had any transmission problems.... ???

 

Powershifting, speedshifting, I'm sure it's the same thing. I've just grown up around what your describing being called as powershifting. Hoss, maybe you were lucky. Know a couple of people who have blown synchros doing that. Know a couple of people who haven't. Who knows. All I know is that I wouldn't want to do it in a truck. To long of a throw. Now on a sports car or something, I wouldn't mind AS MUCH. Still wouldn't do it though.<br><br>I know that you can easily blow synchros out. The Vette has gone through two trannies cause of this. And I've never once power/speed shifted it. Always use the clutch and always push it fully in. I wouldn't want to do it cause until you learn where that proper rpm is, you are going to grind the gears, and that's bad.

 

I do it in mine all the time no problems. over a 110k on it

 

power shifting - speed shifting -----in the old days !!!<br>it used to mean =<br> when you left the line in a drag race.<br>Gas pedal was to the floor all the way to the end.<br>shifting was done forcefully, as the revs would build to destruction if you missed a shift. This is HARD on synchros!!!!<br><br>If shifting with out a clutch is done after initial start, you wait for the engine to decrease in rpm to shift up (and Slip it in with no grinding ) going down in gears you will need to rev engine. as long as the gears are meshing, you are not tearing out synchros <br><br>yea -- I suppose I'm showing my age now ;D

 

Drove my old '74 VW bus home one night about 25 miles by syncro-shifting after the clutch cable broke.
Shifting &quot;crash-box&quot; style will kill a tranny.

 

[quote author=OkieBroncRider link=board=10;threadid=6221;start=0#57019 date=1035479984]<br>My question to you is WHY? If you didnt wanna use the clutch in the first place you should have got an auto. <br>[/quote]

 

At one time I was a milkman with a door to door route.<br>I drove it for 2 months with no clutch ( 5 spd - 2 spd axle )<br>I started it in bulldog and went from there. <br>1965 Furd 1-1/2 ton.<br>FUN - FUN - FUN<br>We call it drive shifting.<br><br> : Eddie : 8)

 

dam, guess i better stay with the clutch as i can't afford any [move]freggen headaches !!![/move] :P