Transfer case 2WD?
Thread Starter
|
Junior User
Joined: May 2002
Posts: 90
Likes: 0
From: Eudora USA
Transfer case 2WD?
OK due to the current fuel crisis and my continuous want for more power I came up with this idea and I would like some input.
Lets say a guy put the widely hated 2.75 gears in the 9" rear end of his 2WD truck. While doing this he also installed a NP-205 transfer case behind his C-6 automatic tranny. He then hooked up the rear yoke of the 205 to his shortend driveshaft and left the front yoke alone- not atached to anything becouse the truck is 2WD. Now wouldent this be the best of both worlds when talking about economy and preformance? One could put the transfer case in high and his final ratio would be 2.75:1 giving him good fuel economy. He could also drive around with the transfer case in low range wich would result in a final ratio of 5.5:1 giving him better proformance than 4.11 gears yet not so low that he could not still drive or drag in that range. Also this would be much cheaper than an overdrive unit. Basicaly when you start up the truck you have the choice of puting it in economy range or profrmance range.
I was thinking about this and it seemed to be to good to be true so please tell me what is wrong with this idea or if it is the perfict solution to geting good gas mileage and retaining proformance.
-Jim
Lets say a guy put the widely hated 2.75 gears in the 9" rear end of his 2WD truck. While doing this he also installed a NP-205 transfer case behind his C-6 automatic tranny. He then hooked up the rear yoke of the 205 to his shortend driveshaft and left the front yoke alone- not atached to anything becouse the truck is 2WD. Now wouldent this be the best of both worlds when talking about economy and preformance? One could put the transfer case in high and his final ratio would be 2.75:1 giving him good fuel economy. He could also drive around with the transfer case in low range wich would result in a final ratio of 5.5:1 giving him better proformance than 4.11 gears yet not so low that he could not still drive or drag in that range. Also this would be much cheaper than an overdrive unit. Basicaly when you start up the truck you have the choice of puting it in economy range or profrmance range.
I was thinking about this and it seemed to be to good to be true so please tell me what is wrong with this idea or if it is the perfict solution to geting good gas mileage and retaining proformance.
-Jim
Transfer case 2WD?
Cargo Master
Joined: Jul 2000
Posts: 2,281
Likes: 18
From: Northern California
Transfer case 2WD?
Yeah it'll work, but the ratio is 1:1 and about 2:1 and that's just too wide for it to be very useful. The 2.75 would be great for normal driving but the 5.xx would be pretty low for any real use except towing.
In your case of an auto I think this could actually workout pretty good concidering the price. I wish the NP205 had some way of making it 1:1 and 1.5:1, that would work even better.
Another thing that would help is if you went with taller tires in addition to the 2.75 gears, that would give you something in the 2.5 2.6 range and then 4.x in the low range and that would be even better.
With the auto, it should be nice and smooth too.
In your case of an auto I think this could actually workout pretty good concidering the price. I wish the NP205 had some way of making it 1:1 and 1.5:1, that would work even better.
Another thing that would help is if you went with taller tires in addition to the 2.75 gears, that would give you something in the 2.5 2.6 range and then 4.x in the low range and that would be even better.
With the auto, it should be nice and smooth too.
Thread Starter
|
Junior User
Joined: May 2002
Posts: 90
Likes: 0
From: Eudora USA
Transfer case 2WD?
I agree, for most of you guys the 5.5 for the low would be a little extreme but I am reving up to 6500 rpm with the bracket master II cam i have in my 400. Now I just have to find some parts. Do you guys know if I could just take the driveshafts and transfer case from a simmilar truck and swap it in or would the lengths be differnt for a 2wd truck.
-Jim
-Jim
Tuned
Joined: Jul 2001
Posts: 439
Likes: 0
From: Erie, Pa
Transfer case 2WD?
You would need the transfer case, and the adaptor to bolt it to the trans. There are a couple of different adaptors, so measure carefully. I would think that the driveshaft from the same style 4x4 would work. Keep in mind that you no longer have the slip in yoke in the tranny, but now you will have a slip joint in the driveshaft. I would also grab the tranny tunnel for the cab from the 4x4 as it will make more room for the shifter along with the boot. Also, grab the speedo cable from the 4x4 as the cable goes to the transfer case, instead of just the back of the tranny.
Now if there was just a way to get the 4x4 transfercase to shift while moving.
1 other thing I just thought of, I have seen a manual tranny behind an auto, same effect, but with more choices. Basicly make an adaptor to mount the auto tranny output shaft onto the input shaft of the manual. A bit longer, but the price to pay for more gear selection.
Steve S.
54 F-100
77 F-250 Supercab
79 Bronco (wife's)
99 Expedition (wife's)
Now if there was just a way to get the 4x4 transfercase to shift while moving.
1 other thing I just thought of, I have seen a manual tranny behind an auto, same effect, but with more choices. Basicly make an adaptor to mount the auto tranny output shaft onto the input shaft of the manual. A bit longer, but the price to pay for more gear selection.
Steve S.
54 F-100
77 F-250 Supercab
79 Bronco (wife's)
99 Expedition (wife's)
Thread
Thread Starter
Forum
Replies
Last Post
tbolt64
1987 - 1996 F150 & Larger F-Series Trucks
6
Jun 2, 2013 10:25 AM
BlueOvalBud
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
4
Aug 29, 2009 10:12 AM
powerplay
1987 - 1996 F150 & Larger F-Series Trucks
5
Aug 11, 2006 11:56 AM
mcguyver
Clutch, Transmission, Differential, Axle & Transfer Case
1
May 21, 2003 10:59 PM
