4bt into a 74 Power Wagon

[brodge]

I have a 4bt Cummins That I am getting ready to put into a 74 W200 Power Wagon Funds are low at the time and need some advice. I need to know if the 4 spd Manual transmission will hold up and if so would there be any tricks that may help in mat6ing them together.

 

[Steve Graham]

I have a 4bt Cummins That I am getting ready to put into a 74 W200 Power Wagon Funds are low at the time and need some advice. I need to know if the 4 spd Manual transmission will hold up and if so would there be any tricks that may help in mat6ing them together.

IF the 4speed in question is a cast iron case, NP435, SM420, yes it should hold up. A 4 speed will only give you a top end of about 55 mph and the engine on the governer with lots of engine noise and a loss of mileage. The economy range for the 4B is below 2000 rpm and best mileage is between 1500 and 1800 rpm.

 

[brodge]

Is that speed of 55 reguardless of gearing? I have 4. 10's now and have found a set of 3. 55's that I plan to swap to help that factor.

 

[bgilbert]

Is that speed of 55 reguardless of gearing? I have 4. 10's now and have found a set of 3. 55's that I plan to swap to help that factor.

Low revving Cummins of around 2500 (if that) wide open, non-overdrive 1:1 transmission, 4. 10 gears = slow. Punch in the numbers on one of the online calculators (Randy's Ring & Pinion) to figure your speed.



If funds are low, keep it a gasser.

 

[Steve Graham]

Is that speed of 55 reguardless of gearing? I have 4. 10's now and have found a set of 3. 55's that I plan to swap to help that factor.

Gearing is everything.

3. 05 gears, 30" tall tires would be in the ballpark, but you'd be using first gear (granny) to get moving.

Do your self a favor and run all the numbers on gears/tires sizes before you bolt it together.