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Ron Elkins (207.30.240.16)

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Posted on Saturday, April 24, 2004 - 10:28 pm:   

I just bought a 1970 4905 and the trany broke in half on the way home. had it replaced in bowling green ky at a kenworth dealer. BIG mistake. $1200 labor.twice what they quoted me. the new trany grinds going into gear. grinds while shifting both up and down. is there a clutch or trany brake that needs adjusting? it's a spicer 4 speed vk7145. Thanks in advance
TWO DOGS (4.227.118.168)

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Posted on Saturday, April 24, 2004 - 10:36 pm:   

DO you know about double clutching....has to be done on the spicer
Ron Elkins (207.30.240.144)

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Posted on Saturday, April 24, 2004 - 10:54 pm:   

I have heard of it but nobody seems to be able to tell me how it is done.
TWO DOGS (4.227.118.168)

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Posted on Saturday, April 24, 2004 - 11:03 pm:   

will try to make it short note....when you are in low gear ,winding out,ready to shift,put the clutch in pull it into neutral ,let the clutch out,put the clutch back in,pull it into second...it sounds harder than it really is ...it just becomes habit...easy after a day of playing around on a deserted highway...all gears that is what you do...tell me if you understand,or want more info.
phil potter (65.110.175.155)

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Posted on Saturday, April 24, 2004 - 11:21 pm:   

1. I'm in first gear.
2a. let of accelorator.
2b. Push in clutch.
3. Shift out of first, but stop before going into second.
4. let out on clutch and put clutch back down quickly.
5. Move shifter to second.

On mine, each gear has a little different rythm. One gear, I may double clutch quickly, not really bring my foot even all the way up before going back down and finishing the shift. Going to 4th is a slower smoother action to shift with out a grind. The idea, so Iv'e been told, is to get the gears moving at the same speed for the the next gears to match up.

Going up hill and need to down shift?

I'm in 4th, going up hill, get down to 55 MPH.
1a. let off the accelerator.
1b. push in the clutch
2. take out of 4th gear
3. let out the clutch
4. rev up the engine to what I have learned through experimation in the right rpm's
5a. let off the accelorator
6b. push in the clutch
7 shift down to 3rd
8. floor it or I'll soon be doing the same thing to go down to 2nd.

It actually is a fun challenge to learn just the right moves to make your baby happy. I have a 10 year old that learned to shift as I clutch. It's a beautiful rythm.

phil
Bob (Bobb) (207.216.171.182)

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Posted on Saturday, April 24, 2004 - 11:25 pm:   

have a look at RJ's article here.. helped me get my bus home! http://www.busnut.com/artrjl2.html
TWO DOGS (4.227.118.168)

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Posted on Saturday, April 24, 2004 - 11:31 pm:   

ya' "KINDA" got the idea...it's all timeing...for right now..you need to learn by yourself...no helping hands...on the downshift...it sounds silly...but the noise your engine is makeing in third ready to go into 4th....make THAT noise when you are downshifting...kinda hum & make the engine match your hum.....something that needs to be done alone...people will be laughing at you if you have company...where are you,what state ?
Ron Elkins (207.30.240.193)

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Posted on Saturday, April 24, 2004 - 11:49 pm:   

Thanks for your help. Fort myers Beach Florida till end of may
TWO DOGS (4.227.118.168)

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Posted on Saturday, April 24, 2004 - 11:52 pm:   

also...4th gear is ROAD GEAR...(for the hiway)...1,2,3 in town...
Abajaba (12.217.192.62)

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Posted on Sunday, April 25, 2004 - 4:11 pm:   

The article on shifting is very good.

These transmissions don't have any synchronizers
so they will grind unless you double clutch.

Important things to remember are to find out how
fast you are going at the top end of 1st 2nd and
3rd gears. Then when you are slowing down you get
a couple miles per hour below these speeds and that
is the time that you shift down.

Don't hurry on your shifts and things will work
out pretty good.

In fact after a while it will be possible to
shift when you are not at a shift point because
you didn't have time to down shift, steer, signal
and whatever else at an intersection.

Read the article and then go out and have some
fun learning.
TWO DOGS (65.179.208.106)

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Posted on Sunday, April 25, 2004 - 4:24 pm:   

that's right ...it's all fun....never look at it like a JOB....
charles seaton (205.183.220.106)

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Posted on Monday, April 26, 2004 - 3:27 pm:   

My buddy (a professional) taught me how to shift in a 62 fishbowl suburban (about two years ago). Tough at first, then alot of fun.
John the newbie (199.232.240.24)

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Posted on Thursday, April 29, 2004 - 8:42 am:   

Ron;

Try counting ONE - TWO as you shift.
ONE as you clutch/shift into neutral, and
TWO as you clutch/shift into the desired up-gear.

Once you adjust your one-two pace for one noiseless shift,
all the rest will fall into place. Holding the shifter and feeling
the engine vibration will give you a better feel of the
engine speed for the downshifts also. Never force the
shift; It will either slide in or it won't.

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