Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

thingstodo · 06-13-2012, 01:53 AM

Somewhere in the web I found a site that showed a 1991 chevy S10 transfer case 'bolted on' to the side of the automatic transmission. I did my best to look under the truck when it was parked, in tall grass and it seemed like the transfer case was sort of part of the transmission. Good thing that I didn't buy anything based on that! It turned out to be WRONG.

Now that the truck is apart, I know that the transfer case is separate.

If I can use the transfer case again, it gives me the complicated sliding spline connection to the rear drive shaft, and a bearing for holding the drive shaft up. That alone would be enough to have me use it since I am not a mechanical guy. BUT I can use the transfer case as a 'low gear' as well. The transfer case seems to be between 2.6 and 2.7 to 1 in '4wheel low'. I don't plan to re-install the drive shaft to the front wheels (at least for now).

So, if I use the transfer case, what would the maximum speed be?

I was using 2200 rpm for 70 mph from an online ev calculator. I think it was for a 94 s10, but it is likely close enough for me. Using a 2.6 transfer case would drop the 2200 rpm speed to 27 mph. To go 70 mph the electric motor would have to be turning at 5720 rpm. That's pretty fast. It would not have a lot of torque at that speed, maybe 1/3 of rated.

So if I use the transfer case, the electric motor would have to be in the front of the truck, where the engine and transmission were. I had thought to install it just rear of the cab and have it directly coupled to the rear end. That would mean doing the sliding spline thing on my own ...

The electric motor is shorter than I remember, at about 26 inches. It's still big around. The space looks like at least 28 inches, maybe as much as 34 inches.

The electric motor is even heavier than I remember. I don't have anything to measure the weight. Lifting one end with a bit of a lever gives me a guess of over 600 lbs.

This is interesting. I guess it's time to make a cardboard 'mock-up' of the electric motor and see where it will fit. It would be great if I could lift it into the truck from below. Then I would not have to bother my neighbor again.

06-13-2012, 01:53 AM	#118 (permalink)
thingstodo Master EcoModder Join Date: Sep 2010 Location: Saskatoon, canada Posts: 1,488 Ford Prefect - '18 Ford F150 XLT XTR Tess - '22 Tesla Y LR Thanks: 746 Thanked 565 Times in 447 Posts	Transfer Case Somewhere in the web I found a site that showed a 1991 chevy S10 transfer case 'bolted on' to the side of the automatic transmission. I did my best to look under the truck when it was parked, in tall grass and it seemed like the transfer case was sort of part of the transmission. Good thing that I didn't buy anything based on that! It turned out to be WRONG. Now that the truck is apart, I know that the transfer case is separate. If I can use the transfer case again, it gives me the complicated sliding spline connection to the rear drive shaft, and a bearing for holding the drive shaft up. That alone would be enough to have me use it since I am not a mechanical guy. BUT I can use the transfer case as a 'low gear' as well. The transfer case seems to be between 2.6 and 2.7 to 1 in '4wheel low'. I don't plan to re-install the drive shaft to the front wheels (at least for now). So, if I use the transfer case, what would the maximum speed be? I was using 2200 rpm for 70 mph from an online ev calculator. I think it was for a 94 s10, but it is likely close enough for me. Using a 2.6 transfer case would drop the 2200 rpm speed to 27 mph. To go 70 mph the electric motor would have to be turning at 5720 rpm. That's pretty fast. It would not have a lot of torque at that speed, maybe 1/3 of rated. So if I use the transfer case, the electric motor would have to be in the front of the truck, where the engine and transmission were. I had thought to install it just rear of the cab and have it directly coupled to the rear end. That would mean doing the sliding spline thing on my own ... The electric motor is shorter than I remember, at about 26 inches. It's still big around. The space looks like at least 28 inches, maybe as much as 34 inches. The electric motor is even heavier than I remember. I don't have anything to measure the weight. Lifting one end with a bit of a lever gives me a guess of over 600 lbs. This is interesting. I guess it's time to make a cardboard 'mock-up' of the electric motor and see where it will fit. It would be great if I could lift it into the truck from below. Then I would not have to bother my neighbor again.