91-94 centre diff .vs. 95-97?

[alkaline747trio]

91/92 centre diff .vs. 93-97?

Which of these is superior? The newer (not A442F, what center diff. is in the 93+?) has the viscous couplings, but required the wiring of a CDL. Would a newer centre diff. in a 91/92 model with the centre diff. already wired in be surperior than a 93+, new centre diff., and no CDL or 91/92, A442F, CDL switch?

 

[cruiserdan]

Let us get out facts straight. The Viscous transfer case first appeared in the 1993 model year (as an option) and the coupler is the same for 93-thru the 97 model years for both 442 and 343 transmissions. The only difference in the 95+ transfer case is a vibration counter-weight bolted to the outside of the case on the RH side.

 

[alkaline747trio]

Ahhh.....I thought the non-VC went through 94..will change my initial post. BTW, what is the model for the 93+ then?

 

[cruiserdan]

Ahhh.....I thought the non-VC went through 94..will change my initial post.

It did on disc/drum vehicles.

 

[alkaline747trio]

Oh, so it was non-VC + SF or VC + FF in 93/94? Seems like 93-94 had a bunch of variables possible.

 

[cruiserdan]

Correct.

The VC was part of the then optional ABS/FFA/4wheel dics package. That offering became standard in the 95 model year.

 

[alkaline747trio]

Ok thanks for clearing all that up. I'm now set sans the model of the newer centre diff. and which is superior.

 

[caz]

How does the VC on my '97 work? Does it lock up, or is it bypassed totally when the CDL is locked? More specifically, if you were to remove or somehow modify it, could a true 2wd somehow be achieved (with locking hubs), enabling the 4wd with the CDL switch?

I am thinking of selling the 80 because of the milage and gas prices. I am thinking all sorts of things to help me eek out a few more mpg to let me keep my baby!

Apologies in advance if I am hijacking the thread!

CAZ

 

[alkaline747trio]

With the CDL locked, the VCs wont be doing any work because both sides will be equally spinning and equally warm. With the CDL locked, you can remove the front drive shaft and maybe (not real sure on this one) add locking hubs to the front and be 2wd, then throw in the front drive shaft when you're gonna go wheeling. With the older style diff, there is a kit to make the CDL switch your 4wd switch and add locking hubs, etc.

 

[skyshark186]

With the CDL locked, the VCs wont be doing any work because both sides will be equally spinning and equally warm. With the CDL locked, you can remove the front drive shaft and maybe (not real sure on this one) add locking hubs to the front and be 2wd, then throw in the front drive shaft when you're gonna go wheeling. With the older style diff, there is a kit to make the CDL switch your 4wd switch and add locking hubs, etc.

Uhhhh....why would locking hubs be important if you remove the driveshaft?

 

[caz]

Locking hubs would prevent the axle innards from spinning - reducing wear and helping fuel economy.

CAZ

 

[sleeoffroad]

How does the VC on my '97 work? Does it lock up, or is it bypassed totally when the CDL is locked? More specifically, if you were to remove or somehow modify it, could a true 2wd somehow be achieved (with locking hubs), enabling the 4wd with the CDL switch?

Yes, we have a kit to do that. However you loose awd, but it works as you explained. No machining required. Can be done with the transfercase in the truck.

 

[alkaline747trio]

Without the locking hubs, you still have the drag of the front axle/differential, with them you eliminate more of that drag which is why you would want 2wd, IMHO. Slee, I thought that the kit you had was only good for 91/92, did I read something wrong or has it been proven to work on all LC differentials?

 

[Grouseman]

Any guesses of how much this would help on the mpg?

SS

 

[powderpig]

You can use this kit on either model of T-case. What you also loose with the ABS systems is that it is disabled when you put the t-case into 2x and lock out the hubs. Steering gets a little vague. All this and more are in several posts that have been discussed in the past 6-9 months. Do some searching and you could gain some knowledge. Just in the past 2 weeks was a reall great discussion on AWD and such So you could clear up some of the facts about the system you have in the 80 series with the VC system. Do a litte searching. later robbie