Driveline Evolution Questions + info on the '89 2wd

[pepecat]

Well I recently Had my driveline rebalanced + all new servicable U joints (spicer) and HD Carrier Bearing from an authorized Spicer driveline shop. I am amazed with how smooth it was after the rebalance! They even repainted it... Anyway When I brought it in after pulling it out from under my truck in the parking lot, he just stared at me and said "what is this a custom build or somethin'?!?!" I said no I don't think so, here are the chrysler stickers. I have a Regular Cab long bed and it has a two piece w/carrier bearing and the shafts are 4"+ in diameter, they look a little bit larger than my 4" exhaust anyway. He said wow it looks like you should be able to put a one piece DL under there... and checked the spicer manual, the 4" DL needs to be a two piece if it is one inch SHORTER than ours or longer. 1 piece will not work. I don't remember exactly but I think it was about 72" or so?? well I heard that most later regular cab 2wds (4x4 too?) have one piece DL's... Are they smaller in diameter? I noticed that on some later 4x4 first gens, they have a smaller looking Driveline going back... 3" maybe stock?

well maybe chrysler was just overcompensating a little bit with the 4" driveline on the early trucks (because of that infamous cummins driveline snap on the first experimental gen trucks), but it looks cool and is bomb proof! the Driveline guy also said that the 4" is the size they put on the medium duty trucks, like Frieghtliner fl60/70/80's (that come with an optional 5. 9 btw... )

so... .

How big is YOUR driveline??? :-laf

Nick

 

[TKingsbury]

Mine has two one-piecers, but I have a transfer case taking up space for the rear too.

Travis. .

 

[Greenleaf]

My 1990 reg cab D250 has a carrier AND the drive shaft is much larger than what is found on my '92 model.



I believe that they employ the same u-joints. According the the (NAPA) catalog, all the first gen diesels use the same u-joint.



-S

 

[sdstriper]

1989 D250 one piece driveshaft here, I forget the build date now, I'll look again. They were built with one piece or two w/hanger bearing pepecat, the 4x2 D123 regular cabs w/diesel ang there was a change late 88' and another later if I remember correctly. Maybe Mysteryman can answer that one. I believe 4" was std on the D250/350 reg cabs CTD. I know there were shaft dia. of 3" and 4" avail. and single and two piece shafts were put on the D123's.

 

[MMiller]

I wonder if just the auto, 2wd with 3. 07 got the bigger shafts? Thats what its kinda looking like. Dunno how original my 90 is, but the tube is no bigger on my 90 then my 93. Theres probably more strain on the tube when you run a taller diff gear(less torque multiplication).



Michael

 

[Greenleaf]

Yep. My 90 is an auto thereby... . it has the 3. 07 rear gear. I like that word. REAR GEAR. Anyhow, tugboat always said the most impressive thing about the old 90 is the fact that the drive shaft is much bigger than the exhaust pipe.

 

[pepecat]

good inputs, guys... looks like we have shed some light on this subject, trivial as it may seem... no word of anyone breaking a shaft that I've ever heard whether it be 3 or 4"...

 

[sdstriper]

pepecat, what is your wheelbase?

 

[pepecat]

I don't know but it is a stnd cab long bed...

the shortest possible wheelbase with the cummins, I will try to find out what wheelbase this is, or maybe someone else knows?