1948 Ford F6 two speed rear end - High/Low
#17
I have one vacuum line to the speedometer, and one to the wiper motor.
I capped off the line to the tank.
#18
#19
It's attached to the engine compartment, and doesn't spin.
Ah ha! Look on the inside of the cab and you will see a big nut with a 1/8" pipe plug in the middle.
I have one vacuum line to the speedometer, and one to the wiper motor.
Correct, and the wiper hose goes all the way back to the engine manifold, correct?
I capped off the line to the tank.
I saw that. You won't be able to test your system integrity with it capped. Have you looked closely at those vacuum hoses? Are they really garden hoses?
Ah ha! Look on the inside of the cab and you will see a big nut with a 1/8" pipe plug in the middle.
I have one vacuum line to the speedometer, and one to the wiper motor.
Correct, and the wiper hose goes all the way back to the engine manifold, correct?
I capped off the line to the tank.
I saw that. You won't be able to test your system integrity with it capped. Have you looked closely at those vacuum hoses? Are they really garden hoses?
1234567890
#20
which instructions? The test? Yes.
The test will not work with the engine off. The system vacuum will drop after it is off.
According to the "test", the residual vacuum should hold the axle in high range for about ten minutes after the engine is shut off. After that it's a moot point.
The test will not work with the engine off. The system vacuum will drop after it is off.
According to the "test", the residual vacuum should hold the axle in high range for about ten minutes after the engine is shut off. After that it's a moot point.
#21
#23
#25
There is. The Eaton 1350 I have for my F-600 had a vacuum actuator on it and I changed it to an electric one. I was able to buy a complete rebuild kit for it too. Evidently it was used for many years, You would probably need a 6v motor unless you're changing to 12v.
Regards,
Rick
#26
Eaton 2 Speed: Parts & Accessories | eBay
I was surprised to learn that there was also a manual version that used a pull cable with a latching lever under the dash.
#27
Then I bought a ring and pinion from CT that he said was "a little pitted" that turned out to be severely pitted and unusable (he said the pits would "hold more oil"......yeah.....)!
So ended up getting a complete "third member" from a truck parts outfit in Seattle. The rebuild (shift) kit came from Coast Truck Parts in Ventura Ca. They actually had it "on the shelf" complete with a new 12v motor!
#28
#29
If you want more power you'll need something with a little more HP. (my F-600 came stock with a 223 cu-IN 6.......I have a 292 Y-block now)
Another fairly low cost alternative could be a much newer 300 cu-in 6. (my second choice after the 292-Y) They even put them in the F-600's in the 60's and truck wrecking yards will have them sitting on the shelves.
The other advantage of going with a 300-6 is you can also directly bolt it to a MUCH more modern ZF 5-speed trans and you can install a parking-brake unit on the back like the one I have on my E4OD. (The ZF-5 speed and tail mounted parking brake was standard equipment on the F450/550 in later years, and depending on the integral bell housing, was made to work with the diesels, 300, and modular V-8/V-10 engines etc.....)
An F-6/600 with a 2-speed Eaton, 300-6 and ZF-5 speed would be a sweet ride!
Cheers,
Rick
#30
The spur gear 4 speeds will whine pretty loud in any gear but 4th, but especially in 3rd. It is perfectly normal, part of the fun in driving these old trucks. Be sure that when you go up a hill with the axle in high range that you let your foot off the gas pedal before you crest the hill or the axle will jump out of gear when the gear pressure is off cresting the hill. Also, 3rd high and 4th low are almost identical with the 5.83-8.11 axle, so split shifting between 3rd and 4th is pointless. These engines do lose a lot of speed on hills, especially if you have anything on the truck. With a V8, 5.83 gears in high and 8.25-20 tires your truck should do 55 mph easily. I would think with your "H" six you should be able to do as well.
Mark
Mark