3 speed transmission and vacume TC

[howardtimber]

My 68' has a vacume TC and i recently acquired some parts vehiles so i have motors and transmissions gallore. I have decided to leave F engine in for now but am putting floor shifter scout power steering and wasngoing to leave in vacume but now that i have newer TC with shifter. Not sure whether to put newer trans with shifter transfer or will the vacume still work. I dont really understand the vacume system. Or should i go ahead and put 4 speed in??

 

[dohcdelsol93]

I have the 3 speed...really wish i had a 4 speed. The gear ratio sucks for down shifting, if i had F power rather than SBC power I'd really hate it on the street.



I immediatly switched from VAC to mechanical shift but i was already in it. If it works i'd leave it be.

I really miss the column shift, I would have loved to have kept that, the front bench seat loses it's usefulness when you have a shifter in the center of the tranny hump.

 

[Trollhole]

4speed and do it once.

 

[dohcdelsol93]

there is nothing wrong with the 3 speed...just less gearing options.

the 1st gear is a little lower.

You have to shift into 2nd before putting her in 1st or reverse


I have asperations to change mine to a 4 speed transmission but only for the overdrive...and it's not a toyota transmission.

 

[the gimpey one]

there is nothing wrong with the 3 speed...just less gearing options.

the 1st gear is a little lower.

You have to shift into 2nd before putting her in 1st or reverse


I have asperations to change mine to a 4 speed transmission but only for the overdrive...and it's not a toyota transmission.

Diesel!!!!!!

 

[Trollhole]

there is nothing wrong with the 3 speed...just less gearing options.

the 1st gear is a little lower.

You have to shift into 2nd before putting her in 1st or reverse

I have asperations to change mine to a 4 speed transmission but only for the overdrive...and it's not a toyota transmission.

And no syncros for 1st gear. Ive never had any issue with the ratios. But having to come to a stop before you put it in 1st is something you don't have to worry about with a 4 speed.

 

[ClemsonCruiser]

And no syncros for 1st gear. Ive never had any issue with the ratios. But having to come to a stop before you put it in 1st is something you don't have to worry about with a 4 speed.

You obviously haven't driven one through the mountains You will come to dread the spacing between 2nd and 3rd especially if you are running anything larger than 31s, remember stock tires on these old rigs were 28s

 

[dohcdelsol93]

And no syncros for 1st gear. Ive never had any issue with the ratios. But having to come to a stop before you put it in 1st is something you don't have to worry about with a 4 speed.

you dont have to come to a comlete stop...but it is pretty close..definately less than 5mph.

With 32" tires I sometimes have an issue with not having that extra gear. It's livable with my power range...would be miserable with a gutless F. The gearing is less than ideal when 2nd gear is too high and your moving too fast to go to 1st.

1st gear is also not low enough when towing...On a boat ramp i always put it in low to pull out my boat.

 

[IndianDoc]

Years ago in the dark age's Most heavy duty trucks and all landcruisers did not have synchro's and we shifted them all the time without stopping or even waiting to get below 5mph it was called double clutching and if you had a good ear for engine rpm you could hit first any time you wanted to, but if your ear or timing was off.....oh what a tremendous noise you got to hear, and often borken tranny was the result of a bad shift. Just my .02 but it can be done.

 

[ClemsonCruiser]

Years ago in the dark age's Most heavy duty trucks and all landcruisers did not have synchro's and we shifted them all the time without stopping or even waiting to get below 5mph it was called double clutching and if you had a good ear for engine rpm you could hit first any time you wanted to, but if your ear or timing was off.....oh what a tremendous noise you got to hear, and often borken tranny was the result of a bad shift. Just my .02 but it can be done.

I've often played around with just shifting based on rpm alignment of the gears no clutch input needed

 

[scott johnson]

If you plan on wheeling it do the 4 speed tranny and do the adapter gear and keep the transfer case that came with the 3 speed. Much better crawl ratio and you can do it all at one time and it will give you your floor shift. If you swap out the f later it will all work with several engine options with minimal problems. You will definitely love having the 4speed no matter what.

 

[dohcdelsol93]

I bet the first out of an H41 matched to the low gears of a solid case would be epic!

 

[BillWright]

I've often played around with just shifting based on rpm alignment of the gears no clutch input needed

It's a useful skill to acquire. I grew up on a 59 VW and learned to double clutch to shift into first while I was rolling (1st and reverse had no synchromesh).
Then one night when the clutch cable snapped on the other side of town I realized I could do the other gears with no clutch by just jazzing the footfeed just right.
Next time was at Bike Week Daytona on my Triumph and it worked there too.
Also did it with two other cars, a truck and a Harley (that one was at Bike Week too, in MB).

Like Doc said it's good to practice before you need it. I chipped the gears occasionally in the Volks and it would whine in first and reverse until you got it fixed. Dad put seven clutches and four trannies in that car from dbl clutching and rat-racing.

The trick is in starting and stopping but we don't get to that until later.
A country boy can survive.

 

[Trollhole]

I broke a tooth off on my first cruiser. That was back when 3spds were still expensive. Wasn't a fun sound.