Originally Posted by Workin' 4 Toys
GM IFS is for Corvettes and other cars. Leave it that way....
Axles, bearings, steering components, differential housing all weak in my perspective. I hate that torsion bar type set up, and to know a twisted piece of bar is all that keeps the entire from of the truck off the ground. Sure it rides like a car, but that is NOT why I buy a truck. THE only thing that keeps me clear out of the GM lots is that entire front end system(when we talk about trucks), If they would put a live axle under it already, give me some beefy hubs and a manual shift lever for it, I would own one or more. And I know as a fact, there would be a line of others to get them too.
I look at the underside and think to myself it might as well be a car, and I wouldn't want to haul anything with one.
Its a good grocery getter.
Okay don't take this the wrong way....................but you have been fed a bunch of misinformation just like the rest of the sheeple that dog the IFS. Most of the components you just listed as drawbacks are very similar (in some cases exactly the same) as what comes on your precious solid axle. I have worked the better part of my life in suspension and drive train repair and I have worked on all makes and models. So let's start with some facts and compare, oh say a dodge and a GM IFS.
Dodge Dana 60 axle diameter 1.31" GM 9.25 IFS Axle diameter 1.31"
Dodge Dana 60 Ring Gear diameter 9.75" GM 9.25 IFS Ring gear diameter 9.25", advantage Dodge
Dodge Dana 60 Housing Ductile Steel GM 9.25 Housing Cast Aluminium, advantage Dodge.
Both axles use a Saginaw style box for steering. GM uses a center link while Dodge/Ford use a crossover drag link with a tie rod. Same amount of tie rod ends to wear out in all trucks, no advantage to either.
Both axles use a unit bearing and no lock out hubs. Actually GM's unit bearings are larger than both dodge and ford and seem to last a bit longer. (disclaimer: I hate unit bearings and think they are a bad design verses the traditional hub/bearing setup found on earlier trucks. None the less, GMs do seem to last a bit longer but still crap out way sooner than they should. IMHO unit bearings should not be used on 3/4ton and larger trucks). All late model truck now use unit bearings so you are not going to get your hubs regardless of make. no advantage to any make.
Dodge and Ford both also use a very ill designed track bar to keep the truck moving in a straight line. It is way undersized and tends to wear out in 36-50k miles. There is simply too much stress on the track bar and nobody can seem to mfg a rod end that can handle this stress long term.
As far as I have know GM has not had one single torsion bar fail under normal use. Even if one did fail the bump stops would hold the weight of the truck temporarily.
Again if you are not lifting the truck what does it matter?? I fully understand why someone would choose the solid axle if they are into some mild off roading, desert racing, etc. but I just don't see any advantage on the street opposed to the IFS. In fact I don't see how anyone could make a case for the live axle...........it rides worse, it's heavy, it's 1950s technology. GMs IFS has the same capacity (even more in some configurations) than the solid axle Fords and Dodges. The IFS uses very similar (even the same in some cases) components as it's solid axle counterparts. I realize everyone has their own opinions but the non-IFS crowd seems to be the most uneducated crowd when it comes to actually defending the superiority of the solid axle. It usually turns into............. "because I said so and that's what my brother-in-law who is an ASE certified mechanic said."
There is one reason and only one reason Dodge and Ford continue to use the solid axle......... IT IS CHEAPER to mfg than the IFS.
Have a happy Thanksgiving