Thread: 4 speed strength

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So there you have it, a 4-speed that will tolerate over 700 ft/lbs for $2,499 or a 6-speed that will tolerate 650 ft/lbs for $2,699. Thanks for the help Scooter.

Warner T-10 would be my choice. The "Farmer Four" truck tranny is tough, but the gear ratios are too wierd for your use. A Muncie M-22 would work too.

yes there is trans out ther that can take it but $2699 to $2466 how can you tell me that s a m22 it is much better ?not one stock m22 or m21 ?? i would not wast my time with a stock gm m21 or m22 by the way do you know what he is putting a 4 speed in? mud truck .street truck .off road how big are the tire?? i like to see a big block that make 650 torque in a truck that is 4500+ pounds spining a set of 33 talls and see what happens if it hooks . like rigth now or side steps the clutche at 6500 rpms?yes for a price there is good stuff out there but them trans are not stock gm .i though that was the post subject /

I realy appreciate all the help and you guys gave me alot of choices. And pat I have a stock tranny know but I dont need a stock one I would like to know what it will handle. I guess we will find out because I will gernade that one before I spend the 2,500 dollars. The truck has chincy 33in street tires now but will be getting 38 or maybe 40 if I have enogh money left over. I had a set of 44 but sold them. Needed money.

that m-22 overdrive only shows 4 gears. Is it a 3 speed with over drive?

I thought the 4th gear is less than 1:1 - something like .87:1.

So - its a 4th gear overdrive - at least thats what I saw it as.

Bert

hehehe i shopuld get me one of them super rock crushers so i can shift at 8 grand teehehehehehehe

So it is a tree speed with the fourth gear being overdrive. Right

"........So it is a tree speed with the fourth gear being overdrive. Right.........."

Kind of but not quite

Normally what happens with the 4 speeds overdrive units that are based on a standard 4 speed is that the 3rd gear set (the cluster gear and 3rd gear) is replaced with an overdrive gear set. That is because there is no true 4 "gear" in these transmissions. Fourth simply locks the input and output shaft together to creating the 1 to 1 ratio.

Ford and Chrysler both took this approach in the late 70's; Ford with the RUG style top loader and Chrysler with the 833. Off the top of my head I don't remember GM doing this. I suspect that that is the same approach used by the guy building the Muncies.

In the case of both the Ford and Mopar units these trannys used an existing case, and the special cluster and OD gear (what would be 3rd gear in a standard 4 speed).

The shift lever on the side of the transmission is flipped over and a standard shifter is used (with the lever flipped over the transmission now shifts into direct (now your 3rd gear) then OD) in the normal shift pattern. This was a very cost effective way to develop an OD tranny as it's basically only a gear set change

If your looking at one of these trannys for your project keep in mind that the main reason that they were developed was for fuel economy not necessarily performance. They do have a pretty low first gear in them (usually in the 3.0 something area) and a decent 2nd gear. Unfortunately, there is usually a VERY big jump into 3rd (1:1). This is not TOO bad in something with pretty steep gears to begin with or a broad torque curve. Basically their a good tranny for a cruiser, but not the hot ticket for a race car.

Joe, is your truck a 4wd?

yes with a 1977 chevy 4 speed and a gear to gear transfercase.