Nevermind

I don't know about the exact Tcase but it uses the same gear for both axles.

Same size tires front and rear, preferrably same wear but don't have to be. The TCase drives the front and rear exactly the same, no different ratio for the front and rear.

TDG Your MAY be thinking about a Full time system, but even then I don't think so. In ALL the 4X4's I have had in the last 20 or so years I have run them all on the payment and different highway speeds and never broke anything. The only problem I have ever seen was with different sized tires, front to rear. You should check your manuals and I believe you will find that the Tcase drives front and rear from the same gearset thru a chain to the front output shaft, but driven at the same ratio/speed as the direct driven rear output shaft.

Your t case and all others for that matter, do not have a seperate ratio fro the front and rear. The only thing that changes is lo and high, high being 1 to 1 and low in the 2.75 to 1 range.

This is why equal tires size is important in a 4x4

What TCase do I have in mine anyway? NP241C? 245??? help!
On 1989-96 K and 1992-96 V-series trucks the NP241 is used on ALL models except the the 30 series trucks with dual rear wheels; the Borg-Warner 1370, 4401, or 4470 is used on 30 series trucks with dual rear wheels
That is as I also knew it and it comes from my Chilton's 1988-96 full size truck manual. The 1988-91 V-series trucks used the 208 (88) or the NP241 (89-91) on all but 1 tons. 1 tons used 205 transfer cases.

The 1988 K-series trucks used the NP241 on all models

I'm more than 100% positive, that in Part-Time 4wd systems the front driveshaft rotates at a slightly faster ratio than the rear driveshaft. Only AWD systems that are full time use a 1:1 ratio or some sort of differential.The front and rear outputs on a t case are the same ratio, exactly the same even on a AWD system. AWD is different as it uses a center diff or a clutch pack to eliminate binding like a part time case would case.

ON today's truck the Tcase is the same and the front and rear axle ratio should also be the exact same. In older trucks there might have been a different ratio in the front and rear axle, but not the Tcases, due to different makes, but still only a tooth or two different. example 4.09 front to a 4.11 rear or something like that.

Read the 4wd forums. I had peterson's 4wd or 4wheel and offroad subscriptions for ten years, I'm positive you've been given the right info.

Please lets us know what the other forum tells you. OK