Original engine vs swapped

[ChalkOutline]

Currently stock engine and trans, only because I have not got around to swapping it out. Will be a Diesel (4bt/6bt/6.2or.5L) with an Auto trans w-OD, 205 divorced, 1008 14bolt rear & D60 front 456 gears(I think) and stock size tires, no lift or shackle and spring over.

Check back for progress in about....................a year

[Hetzer]

5.0 Ford and ZF 5 speed trans.

[gonz]

Other: 6.2 to Spicer 3053a to divorced 205. Even with cracked/leaking/lost exhaust pipes on the diesel, swaping out my 200 to the 205 made an unbelievable difference. Watching Toolman's stock truck at HIGH ALTITUDE at the FE, if my truck was stock and running well I would keep the stock set up except for the transfercase. That motor kept running when all the others were gasping. It was seriously impresive- gonz

[moosejr]

At the moment, mine has all stock running gear except the engine was swapped out to a 292 Chevy six.
In the not-too-distant future (hopefully this summer), I am swapping in a 6bt and the axles out of a 90 dodge 1-ton, with a fuller 10-speed and divorced 205 transfer case.

[ryanroo]

Other: 6.2 to Spicer 3053a to divorced 205. Even with cracked/leaking/lost exhaust pipes on the diesel, swaping out my 200 to the 205 made an unbelievable difference. Watching Toolman's stock truck at HIGH ALTITUDE at the FE, if my truck was stock and running well I would keep the stock set up except for the transfercase. That motor kept running when all the others were gasping. It was seriously impresive- gonz

there is something to be said about the old engines. the flatty was doing well also, and was being slowed down by Daves rental TJ more than the altitude.

Ryan

[fisherman]

Swapped in a buick 350 with the stock t98 trans and international 202 transfer case.

[randall555]

my truck has a 17,000 mile engine in it and it runs perfect the only thing i can say about it is the rear main seal leaks alittle but not bad . i have another 230 and t-98 with 13,000 miles on it . I plan on putting in a 350 tuned port injection in it later this year . i really at this piont dont have any thoughts of changing the stock trans and t=case . the 350 has some performace parts in it and should be around 280 hp with 350 ft torque and with the tpi injection and tube intake runners lets the engine develope hp and torque at a somewhat low rpm level . but most likely i will put in a 383 stroker kit and a big mouth intake and larger tpi runners with roller cam with roller lifters and the engine will make around 380 hp with 500 ft torque . i think this will get the big 42x16 x16 super swamper tires turning . and love the sound of that sbc with headers and dual exhaust humming down the road !!!!

[dave]

I swapped in a 350 in my 725 and the rest of the drivetrain is stock. its not real good on the highway for long drives but works good offroad when you can drive slow. on one of my 715's Im using a 3/4 ton chevy 4x4 frame and running gear for better driveability on the highway. on the other Im totally boxing in the stock frame and contemplating using a hydraulic pivot just behind the cab to make the bed rotate independently from the cab plus 5 ton rockwells and 4 wheel steer. probably going to be running a whipple supercharged 496 with an auto od and an atlas transfer case with probably 3 gears. I built a 632 bbc but after the Col. fe, I sold it and want something with alot of power but still manageable on road too.
I road in several trucks that were stock and liked the way they did but parts are expensive and hard to find so i took the cheaper way out and parts are readily available. an overdrive tranny and a different transfer case would be a big plus in making your truck more of a highway friendly truck and you'd be better able to stay up with traffic without pushing your engine to hard.

[wolf.dose]

About in 1980 I got my M715 and completely rebuilt it the first time until October 1982 , when I was a student.
I kicked the original engine out for at least one reson: It was broken, not ready to run without major repair. By that time I could not afford it. So I changed to a German Diesel (for 1200 DM), which was a vintage engine by that time allready, but it made the neccessary rpm. This engine served me well with only 65 hp until the serviceability was over (No more major part available like injection pump housing. I got in 1986 the last complete injection pump available in Germany as a factory change part for 1800 DM. Knowing that I bougt in 1996 a new 6.2 l Detroit Diesel V8, made 1984 according to the lables (for 6000 DM out of the original box). This all new engine I got running (8 hours on my homemade test bench) over the years to prepare to fit it to my M715 (including the adaptation of a manual shift clutch and to original M715 transmission. I did not know by that time that there are offers from the states for 600 to 800 $ for these kits)) With a new overall restauration in 2002 until 2004 it got into the truck. The engine is now at 393 hours (I fixed a REO tachometer to monitor the engine rpm), of course based on the REO engine design 1500 rpm as standard for one engine hour, as said on the tachometer housing).
Performance is very well for European leagal road driving with a truck over 3.5 t GVW. Legally I'm allowed to drive 50 mph . I drive 53 to 55 mph with acceptable fuel consumtion (18 to 22 litres a 100 km), for the performance even on a hilly Autobahn that is ok, also with a loaded M101A1 trailer.
The only problem is: I have to cut down the oil change intervalls of the transmission, the transfer and of the rear axle to the changing interval of the engine, every 5000 miles, due to overheated/burned oil.
In this case I know what I'm talking about. Trucks are my job!
Greetings from Germany
Wolf

[M715VFD405]

My old Dept has 2 m715's both have 454's in them not sure on the tranny's everyone just called them "granny tranny's". They are very slow moving on the street only about 50mph tops or they tend to overheat. Offroad however they have all the power you could ask for and more stamina then even the newer trucks from other depts. I havn't got an M715 but I grew up crawling on these trucks and can't wait to find one in my area to get my hands on. When I do I think I'd like to go with a chevy 350 not sure on a tranny but I'm sure by then I'll have some idea of what to do with help from everyone here.