5 by 4 shift pattern.. I need a memory jogger!!!!
Im aquiring another old GMC this weekend and was informed that it has a 5x4 in it. It has been at least 15 years since the last time I thought about how they shift. I even asked my wife if she remember since that was the 1st trans i taught her to drive but she drew a blank too. Any one who can refresh my memory enough to get it home please lemme know. Thanks
The one I have in my White has 1st(creeper) way over on the right bottom hole, then 2nd top left, third bottom left, 4th center top. 5th (direct)center bottom for the main. On the aux. overdrive is 4 in the top left hole . 3 in the bottom left hole. 2 in the bottom right hole, and 1 in the top right hole.
There is a story about a kid that sold a lawn mower to a minister. When the minister got home he couldn't get it started so he called up to find out what to do.
The kid told him sometimes you have to cuss at it some. The minister said " Son I've been a minister a long time. I don't even know how to swear anymore"
The kid said "Just keep pullin' on that rope It'll come back to ya"
They aren't all set up that way, but if you drove one before it will come back to you
the main box shifts as a regular 5 speed the aux is 1st forward by your seat then back straight for second them to the right and back up for 3 rd them forward for 4th
I am glad to see someone still interested in driving the old trannies, like the five and four. I hope I can help jog your memory.
Most of the Five and Fours of yesteryear were produced by Spicer. The Old Four and Four was everywhere it seemed. The Five speed main was not uncommon, though.
In the Spicer main boxes, there were two different varieties of main boxes: Direct and Overdrive. More common was the overdive. I will attempt to "draw" the shift patterns used by these combinations, with direct and overdrive main boxes, and the four speed auxiliary, also known as the "Brownie":
MAIN BOX(direct) MAIN BOX (OD) BROWNIE
1 2 4 5 1 3 1 4
| | | | | | | |
neutral neutral neutral
| | | | | | | |
3 5 R 2 4 R 2 3
You will note that the overdrive model had an unusual shifting pattern having high gear (overdrive) in the upper left corner of the pattern. The reasons for that are a topic for another forum.
On the Brownie, the gears were more commonly referred to by their "names", rather than their numbers. This made it easier to explain in fender talk. Those names are: 1: Double or Deep Under. 2: Under. 3: Direct. 4: Over.
So, if you are pulling the Grapevine in Third-Under, the Main box would be in third, while the Brownie would be in second (Under).
Now, to DRIVE this seemingly confusing setup was a breeze, when one understood the relationship of all those gears. Perhaps the easiest way to explain it would be this way: the MAIN box was you transmission you used to get on down the road. The AUXILIARY (Brownie) simple allowed you to "split" or divide the gears in the Main box for better versatility.
SO...You wanna get going: With a fully loaded car, start off in First-double under. Shift the brownie to under next, then direct, and then over. Now, shift the MAIN box to second (ususally about a 1000 rpm drop. You are now in Second-Over. Down-shift the Brownie to Under (you are now in Second-Under). Bring that gear up to shift RPM. Next, shift the brownie to direct, and next to over. Repeat this pattern to third and fourth gears. Fifth gear in the Overdirve models could be shifted WITHOUT a brownie split (.83 Overdrive), or with a single gear Brownie drop - to Direct (a .64 Overdrive).
This is probably mor confusing than actually DRIVING one. As a possibly more useful reference, refer to the chart below, indicating a "typical" progressive shift sequence for a 5 X 4 double overdrive transmission.
1: First Double Under
2: First Under
3: First Direct
4: First Over
5: Second Under
6: Second Direct
7: Second Over
8: Third Under
9: Third Direct
10: Third Over
11: Fourth Under
12: Fourth Direct
13: Fourth Over
14: Fifth Over
Whew! I hope this helps! I have driven many a mile using many combinations of main boxes and Brownies. In fact, the car I drive every day has an 18 speed with an 8341F Brownie. 72 forward gears, and 16 reverses... Hah!
Like I stated earlier, it is easier to explain this while actually driving one. But If it's been a while for you, I hope the above mentioned info can help.
Dave from Ducor
thanks for the memory jogger. The guy is jerking me around on the car but im still trying to get it. I refuse to pay a fortune for it when he offered it to me for free the first time. I guess I showed to much interest in it huh?
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